Eight Percent Or More Manganese Containing Patents (Class 148/329)
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Patent number: 10329650Abstract: Disclosed herein is a high manganese steel including: 0.5 to 1.2 wt % of carbon (C), 0.1 to 2.3 wt % of silicon (Si), 15 to 30 wt % of manganese (Mn), 7.0 to 13.0 wt % of aluminum (Al), 0.01 to 3.0 wt % of nickel (Ni), 0.01 to 0.5 wt % of chromium (Cr), 0.01 to 0.4 wt % of molybdenum (Mo), 0.01 to 0.5 wt % of vanadium (V), 0.005 to 0.3 wt % of niobium (Nb), 0.005 to 0.3 wt % of titanium (Ti), and remainder iron (Fe) and other inevitable impurities.Type: GrantFiled: December 12, 2016Date of Patent: June 25, 2019Assignee: Hyundai Motor CompanyInventors: Sung Chul Cha, Seong Guk Son, Seung Hyun Hong, Soon Woo Kwon
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Patent number: 10253399Abstract: An energy-storing container is made of a lightweight steel having the following chemical composition (in wt %): C 0.04-2%; Mn 14-30%; Al 1.5-12%; Si 0.3-3%; Cr 0.12-6%, and additionally one or more of the following elements: Ti, V, Nb, B, Zr, Mo, Ni, Cu, W, Co, P, N, each at up to 5% and in total at up to 10%, wherein the remainder is Fe including common steel tramp elements, wherein the concrete alloy composition is selected in order to limit the ??-martensite fraction before or after a forming process to no more than 3%, with the stipulation that the ??-martensite equivalent according to 0.1*wt % Mn+wt % C+0.05*wt % Si is between 3.4 and 10.5.Type: GrantFiled: January 21, 2016Date of Patent: April 9, 2019Assignee: SALZGITTER FLACHSTAHL GMBHInventors: Michael Braun, Manuel Otto, Zacharias Georgeou, Bianca Springub
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Patent number: 10119185Abstract: Steel for forging having high strength and superior machinability due to controlled cooling immediately after shaping by hot forging followed by tempering and having a lower specific gravity than ordinary steel for forging use, the steel containing C: 0.05 to 0.50%, Si: 0.01 to 1.50%, Mn: 3.0 to 7.0%, P: 0.001 to 0.050%, S: 0.020 to 0.200%, Al: 3.0 to 6.0%, Cr: 0.01 to 1.00%, and N: 0.0040 to 0.0200% and having a balance of Fe and unavoidable impurities.Type: GrantFiled: April 8, 2010Date of Patent: November 6, 2018Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Hiromasa Takada, Suguru Yoshida
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Patent number: 10023951Abstract: A method to increase the damping of a substrate using a face-centered cubic ferromagnetic damping material.Type: GrantFiled: June 19, 2017Date of Patent: July 17, 2018Inventor: Mo-How Herman Shen
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Patent number: 9151706Abstract: In a method of determining a fatigue crack lifetime of a low-alloy steel material coming in contact with high-pressure hydrogen in a high-pressure hydrogen environment, estimate a fatigue crack acceleration starting point KmaxT of the low-alloy steel material using a crack-growth threshold stress intensity factor KIH-R obtained through a rising load test on the low-alloy steel material in a high-pressure hydrogen environment. The high-pressure hydrogen environment of the rising load test is a high-pressure hydrogen environment which has the same pressure and atmosphere as in the high-pressure hydrogen environment in which KmaxT is estimated and in which the test temperature tolerance between both environments is ±5° C.Type: GrantFiled: March 1, 2012Date of Patent: October 6, 2015Assignee: THE JAPAN STEEL WORKS, LTD.Inventor: Yoru Wada
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Patent number: 9039961Abstract: The invention relates to a low-nickel austenitic stainless steel with high resistance to delayed cracking and the use of the steel. The steel contains in weight % 0.02-0.15% carbon, 7-15% manganese, 14-19% chromium, 0.1-4% nickel, 0.1-3% copper, 0.05-0.3% nitrogen, the balance of the steel being iron and inevitable impurities, and the chemical composition range in terms of the sum of carbon and nitrogen contents (C+N) and the measured Md3o-temperature is inside the area defined by the points ABCD which have the following values Point Md30° C. C+N % A?80 0.1 B+7 0.1 C?40 0.40 D?80 0.40.Type: GrantFiled: April 18, 2011Date of Patent: May 26, 2015Assignee: Outokumpu OyjInventors: Juho Talonen, Suresh Kodukula, Tero Taulavuori
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Publication number: 20150114526Abstract: Provided is a Fe—Mn—C-based twinning-induced plasticity (TWIP) steel which includes 13 wt % to 24 wt % of manganese (Mn), 0.4 wt % to 1.2 wt % of carbon (C), and iron (Fe) as well as other unavoidable impurities as a remainder, is manufactured by caliber rolling, has a microstructure including elongated grains that are elongated in a rolling direction, and has an average grain size of the elongated grains in a direction perpendicular to the rolling direction of 1 ?m or less.Type: ApplicationFiled: August 17, 2012Publication date: April 30, 2015Applicant: POSTECH ACADEMY-INDUSTRY FOUNDATIONInventors: Tae Kyung Lee, Chong Soo Lee, Seok Weon Song, Jae Hyung Kim, Kaneaki Tsuzaki, Motomichi Koyama
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Publication number: 20150020928Abstract: Provided are an austenitic steel having excellent machinability and ultra-low temperature toughness in a weld heat-affected zone including 15 wt % to 35 wt % of manganese (Mn), carbon (C) satisfying 23.6C+Mn?28 and 33.5C?Mn?23, 5 wt % or less (excluding 0 wt %) of copper (Cu), chromium (Cr) satisfying 28.5C+4.4Cr?57 (excluding 0 wt %), and iron (Fe) as well as other unavoidable impurities as a remainder, wherein a Charpy impact value of a weld heat-affected zone at ?196° C. is 41 J or more, and a method of manufacturing the steel. According to the present invention, a low-cost ultra-low temperature steel may be obtained, a stable austenite phase may be formed at low temperature, carbide formation may be effectively suppressed, and a structural steel having excellent machinability and ultra-low temperature toughness in a weld heat-affected zone may be provided.Type: ApplicationFiled: December 27, 2012Publication date: January 22, 2015Inventors: Soon-Gi Lee, Jong-Kyo Choi, Young-Hwan Park, Hee-Goon Noh, Hyun-Kwan Cho, In-Shik Suh, In-Gyu Park, Hong-Ju Lee
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Publication number: 20140261918Abstract: Improved steel compositions and methods of making the same are provided. The present disclosure provides advantageous wear resistant steel. More particularly, the present disclosure provides high manganese (Mn) steel having enhanced wear resistance, and methods for fabricating high manganese steel compositions having enhanced wear resistance. The advantageous steel compositions/components of the present disclosure improve one or more of the following properties: wear resistance, ductility, crack resistance, erosion resistance, fatigue life, surface hardness, stress corrosion resistance, fatigue resistance, and/or environmental cracking resistance. In general, the present disclosure provides high manganese steels tailored to resist wear and/or erosion.Type: ApplicationFiled: March 4, 2014Publication date: September 18, 2014Applicant: ExxonMobil Research and Engineering CompanyInventors: HyunWoo Jin, Ning Ma, Raghavan Ayer, Russell Robert Mueller, Hak-Cheol Lee, Jong-Kyo Choi, In-Shik Suh
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Publication number: 20140230971Abstract: A method for manufacturing the high strength steel sheet having excellent formability includes hot-rolling a steel slab having a chemical composition containing, by mass %, C: 0.03% or more and 0.35% or less, Si: 0.5% or more and 3.0% or less, Mn: 3.5% or more and 10.0% or less, P: 0.1% or less, S: 0.01% or less, N: 0.008% or less and the balance comprising Fe and inevitable impurities, coiling the hot-rolled steel sheet at a temperature range of the Ar1 transformation point to the Ar1 transformation point+(the Ar3 transformation point?the Ar1 transformation point)/2, cooling the coiled steel sheet down to 200° C. or lower, heating and holding the cooled steel sheet at a temperature range of the Ac1 transformation point?200° C.Type: ApplicationFiled: September 10, 2012Publication date: August 21, 2014Applicant: JFE Steel CorporationInventors: Yoshiyasu Kawasaki, Hiroshi Hasegawa, Tatsuya Nakagaito, Yasunobu Nagataki
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Patent number: 8778097Abstract: A low specific gravity and high strength steel sheet includes C of 0.2% to 0.8%, Mn of 2% to 10%, P of 0.02% or less, S of 0.015% or less, Al of 3% to 15%, and N of 0.01% or less. A ratio of Mn/Al is 0.4 to 1.0. Retained austenite in a structure is included in the range of 1% or more. The steel sheet further includes one or two or more elements selected from the group consisting of Si of 0.1% to 2.0%, Cr of 0.1% to 0.3%, Mo of 0.05% to 0.5%, Ni of 0.1% to 2.0%, Cu of 0.1% to 1.0%, B of 0.0005% to 0.003%, Ti of 0.01% to 0.2%, Zr of 0.005% to 0.2%, Nb of 0.005% to 0.2%, W of 0.1% to 1.0%, Sb of 0.005% to 0.2%, and Ca of 0.001% to 0.2%.Type: GrantFiled: October 29, 2008Date of Patent: July 15, 2014Assignee: PoscoInventors: Kwang Geun Chin, Jai Hyun Kwak
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Publication number: 20140190594Abstract: The present disclosure is directed and formulations and methods to provide alloys having relative high strength and ductility. The alloys may be provided in seamless tubular form and characterized by their particular alloy chemistries and identifiable crystalline grain size morphology. The alloys are such that they include boride pinning phases. In what is termed a Class 1 Steel the alloys indicate tensile strengths of 700 MPa to 1400 MPa and elongations of 10-70%. Class 2 Steel indicates tensile strengths of 800 MPa to 1800 MPa and elongations of 5-65%. Class 3 Steel indicates tensile strengths of 1000 MPa to 2000 MPa and elongations of 0.5-15%.Type: ApplicationFiled: January 9, 2014Publication date: July 10, 2014Inventors: Daniel James BRANAGAN, Sheng CHENG, Longzhou MA, Jason K. WALLESER, Grant G. JUSTICE, Andrew T. BALL, Kurtis CLARK, Scott LARISH, Alissa PETERSON, Patrick E. MACK, Brian D. MERKLE, Brian E. MEACHAM, Alla V. SERGUEEVA
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Publication number: 20140158257Abstract: In a method for producing a motor vehicle component and a motor vehicle component produced according to the invention a steel sheet with a stacking fault energy between 10 and 40 mJ/m2 and a manganese content between 10 and 30% is provided, which is prone to twin formation at room temperature and has at least regions with a predominantly austenitic microstructure. Regions of this steel sheet are first temperature treated to a temperature between +30° C. and ?250° C. and subsequently cold formed.Type: ApplicationFiled: November 29, 2013Publication date: June 12, 2014Applicant: Benteler Automobiltechnik GmbHInventors: Andreas Frehn, Thomas Niendorf, Christian Rüsing, Hans Jürgen Maier
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Patent number: 8703047Abstract: As a stainless steel for a metal part for clothing ornament capable of working into a complicated form part and having such nonmagnetic properties that the worked part can cope with the detection through needle detecting device is provided a high-Mn austenitic stainless steel having a chemical composition comprising C: 0.02-0.12 mass %, Si: 0.05-1.5 mass %, Mn: 10.0-22.0 mass %, S: not more than 0.03 mass %, Ni: 4.0-12.0 mass %, Cr: 14.0-25.0 mass % and N: 0.07-0.17 mass %, provided that these components are contained so that ? cal (mass %) represented by the following equation (1) is not more than 5.5 mass %: ? cal (mass %)=(Cr+0.48Si+1.21Mo+2.2(V+Ti)+0.15Nb)?(Ni+0.47Cu+0.11Mn?0.0101Mn2+26.4C+20.1N)?4.7??(1) and having a magnetic permeability of not more than 1.003 under a magnetic field of 200 kA/m.Type: GrantFiled: February 26, 2010Date of Patent: April 22, 2014Assignee: Nippon Yakin Kogyo Co., Ltd.Inventors: Shigeru Hirata, Yuji Ikegami, Kazuhiro Yamakawa
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Publication number: 20140050941Abstract: A high strength steel sheet including, by mass, C: 0.03% or more and 0.25% or less, Si: 0.4% or more and 2.5% or less, Mn: 3.5% or more and 10.0% or less, P: 0.1% or less, S: 0.01% or less, Al: 0.01% or more and 2.5% or less, N: 0.008% or less, Si+Al: 1.0% or more, the balance being Fe and inevitable impurities. The area ratio of ferrite is 30% or more and 80% or less, the area ratio of martensite is 0% or more and 17% or less, the volume fraction of retained austenite is 8% or more, and the average grain size of retained austenite is 2 ?m or less.Type: ApplicationFiled: April 20, 2012Publication date: February 20, 2014Inventors: Yoshiyasu Kawasaki, Hiroshi Hasegawa, Shinjiro Kaneko, Yasunobu Nagataki
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Patent number: 8647450Abstract: A bead wire has a composition of Mn: 5-35 at % and Al: 5-20 at % and the remainder being Fe and inevitable impurities, in which a steel structure is an austenite single-phase structure, and achieves weight reduction and high ductility without reducing strength.Type: GrantFiled: February 22, 2007Date of Patent: February 11, 2014Assignee: Bridgestone CorporationInventors: Masami Kikuchi, Yukio Aoike, Takashi Yokoi
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Patent number: 8591672Abstract: The invention provides medical devices comprising high-strength alloys which degrade over time in the body of a human or animal, at controlled degradation rates, without generating emboli. In one embodiment the alloy is formed into a bone fixation device such as an anchor, screw, plate, support or rod. In another embodiment the alloy is formed into a tissue fastening device such as staple. In yet another embodiment, the alloy is formed into a dental implant or a stent.Type: GrantFiled: July 19, 2012Date of Patent: November 26, 2013Assignee: Bio DG, Inc.Inventors: Gordon F. Janko, Herbert R. Radisch, Thomas A. Trozera
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Publication number: 20130209833Abstract: Hot-rolled or cold-rolled steel plate, method for manufacturing same and use thereof in the automotive industry A hot-rolled or cold-rolled steel plate, characterized in that its composition is in weight percentages: 0.6%?C?0.9%; 17%?Mn?22%; 0.2%?Al?0.9%; 0.2%?Si?1.1% with 0.85%?Al+Si?1.9%; 1.2%?Cu?1.9%; S?0.030%; P?0.080%; N?0.1%; optionally: Nb?0.25% and preferably comprised between 0.070 and 0.25%; V?0.5% and preferably comprised between 0.050 and 0.5%; Ti?0.5%, and preferably comprised between 0.040 and 0.5%; Ni?2%; trace amounts Cr?2%, preferably?1%; B?0.010%, and preferably, comprised between 0.0005% and 0.010%; the remainder being iron and impurities resulting from the production. A method for manufacturing this plate, the use of this plate in the automotive industry.Type: ApplicationFiled: October 20, 2011Publication date: August 15, 2013Applicant: ARCELORMITTAL INVESTIGACION Y DESARROLLO, S.L.Inventors: Colin Scott, Philippe Cugy
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Patent number: 8454765Abstract: An austenitic, substantially ferrite-free steel alloy and a process for producing components therefrom. This Abstract is not intended to define the invention disclosed in the specification, nor intended to limit the scope of the invention in any way.Type: GrantFiled: April 15, 2011Date of Patent: June 4, 2013Assignees: Boehler Edelstahl GmbH & Co. KG, Schoeller-Bleckmann Oilfield Technology GmbHInventors: Gabriele Saller, Herbert Aigner, Josef Bernauer, Raimund Huber
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Publication number: 20130118647Abstract: A method of producing an austenitic steel strip or sheet excellent in resistance to delayed cracking and a steel produced thereby.Type: ApplicationFiled: June 10, 2011Publication date: May 16, 2013Applicant: TATA STEEL IJMUIDEN BVInventors: Basjan Berkhout, Marcus Cornelis Maria Cornelissen, Jayesh Ramjibhai Patel
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Publication number: 20130087253Abstract: A high strength steel sheet has tensile strength of at least 1470 MPa and (tensile strength×total elongation) of at least 29000 MPa·% with a composition including, by mass %, C: 0.30% to 0.73%, Si: 3.0% or less, Al: 3.0% or less, Si+Al: at least 0.7%, Cr: 0.2% to 8.0%, Mn: 10.0% or less, Cr+Mn: at least 1.0%, P: 0.1% or less, S: 0.07% or less, N: 0.010% or less, and remainder as Fe and incidental impurities; and processing the steel sheet such that microstructure satisfies area ratio of martensite with respect to the microstructure of 15% to 90%; content of retained austenite of 10% to 50%; at least 50% of the martensite is constituted of tempered martensite and area ratio of the tempered martensite with respect to the microstructure is at least 10%; and area ratio of polygonal ferrite with respect to the microstructure is 10% or less.Type: ApplicationFiled: February 28, 2011Publication date: April 11, 2013Applicant: JFE STEEL CORPORATIONInventors: Hiroshi Matsuda, Yoshimasa Funakawa, Yasushi Tanaka
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Publication number: 20130081740Abstract: A novel FeMnAlC alloy, comprising 23˜34 wt. % Mn, 6˜12 wt. % Al, and 1.4˜2.2 wt. % C with the balance being Fe, is disclosed. The as-quenched alloy contains an extremely high density of nano-sized (Fe,Mn)3AlCx carbides (??-carbides) formed within austenite matrix by spinodal decomposition during quenching. With almost equivalent elongation, the yield strength of the present alloys after aging is about 30% higher than that of the optimally aged FeMnAlC (C?1.3 wt. %) alloy systems disclosed in prior arts. Moreover, the as-quenched alloy is directly nitrided at 450˜550° C., the resultant surface microhardness and corrosion resistance in 3.5% NaCl solution are far superior to those obtained previously for the optimally nitrided commercial alloy steels and stainless steels, presumably due to the formation of a nitrided layer consisting predominantly of AlN.Type: ApplicationFiled: September 27, 2012Publication date: April 4, 2013Applicant: NATIONAL CHIAO TUNG UNIVERSITYInventor: NATIONAL CHIAO TUNG UNIVERSITY
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Publication number: 20130048150Abstract: A method for producing a workpiece having properties which are adjustable across a wall thickness or strip thickness of the workpiece, includes the steps of subjecting the workpiece to a decarburizing annealing treatment under an oxidizing atmosphere and to an accelerated cooling and/or a cold forming for generating a property gradient of the workpiece, wherein the workpiece is made of an austenitic lightweight steel which has an alloy composition which includes by weight percent 0.2% to 1% carbon, 0.05% to <15% aluminum, 0.05% to 6.0% silicon, 9% to <30% manganese, and at least one element selected from the group consisting of chromium, copper, boron, titanium, zirconium, vanadium and niobium, wherein chromium=4.0%; titanium+zirconium=0.7%; niobium+vanadium=0.5%, boron=1%, the remainder iron including common steel companion elements.Type: ApplicationFiled: February 10, 2011Publication date: February 28, 2013Applicant: SALZGITTER FLACHSTAHL GMBHInventors: Daniela John, Manuel Otto, Rune Schmidt-Jürgensen, Thomas Evertz, Zacharias Georgeou, Bianca Springub
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Publication number: 20130037179Abstract: A casting of a white cast iron alloy and a method of producing the casting are disclosed. A white cast alloy is also disclosed. The casting has a solution treated microstructure that comprises a ferrous matrix of retained austenite and chromium carbides dispersed in the matrix, with the carbides comprising 15 to 60% volume fraction of the alloy. The matrix composition comprises: manganese: 8 to 20 wt %; carbon: 0.8 to 1.5 wt %; chromium: 5 to 15 wt %; and iron: balance (including incidental impurities).Type: ApplicationFiled: February 1, 2011Publication date: February 14, 2013Applicant: WEIR MINERALS AUSTRALIA LTDInventor: Kevin Dolman
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Patent number: 8337749Abstract: An austenitic stainless steel composition including relatively low Ni and Mo levels, and exhibiting corrosion resistance, resistance to elevated temperature deformation, and formability properties comparable to certain alloys including higher Ni and Mo levels. Embodiments of the austenitic stainless steel include, in weight percentages, up to 0.20 C, 2.0-9.0 Mn, up to 2.0 Si, 15.0-23.0 Cr, 1.0-9.5 Ni, up to 3.0 Mo, up to 3.0 Cu, 0.05-0.35 N, (7.5(% C))?(% Nb+% Ti+% V+% Ta+% Zr)?1.5, Fe, and incidental impurities.Type: GrantFiled: November 2, 2009Date of Patent: December 25, 2012Assignee: ATI Properties, Inc.Inventors: David S. Bergstrom, James M. Rakowski
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Patent number: 8246762Abstract: The invention provides medical devices comprising high-strength alloys which degrade over time in the body of a human or animal, at controlled degradation rates, without generating emboli. In one embodiment the alloy is formed into a bone fixation device such as an anchor, screw, plate, support or rod. In another embodiment the alloy is formed into a tissue fastening device such as staple. In yet another embodiment, the alloy is formed into a dental implant or a stent.Type: GrantFiled: January 7, 2010Date of Patent: August 21, 2012Assignee: Bio DG, Inc.Inventors: Gordon F. Janko, Herbert R. Radisch, Jr., Thomas A. Trozera
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Publication number: 20120145286Abstract: Hadfield steel and a method for obtaining the same, which steel has better mechanical properties than basic Hadfield steel, without detriment to any of them, which has a homogenous grain size distribution, thus allowing new applications, having the following chemical composition: 0.90 to 1.35% by weight of C, 11.00 to 14.00% by weight of Mn, 0.80% maximum by weight of Si, 0.07% maximum by weight of P, 0.05% maximum by weight of S and an amount of hafnium greater than or equal to 0.01% and less than 0.1% by weight, the rest being iron and impurities associated with iron, and where the percentages are expressed by weight with respect to the total weight of the steel.Type: ApplicationFiled: December 14, 2011Publication date: June 14, 2012Applicant: FUNDACION TECNALIA RESEARCH & INNOVATIONInventor: Patricia CABALLERO OGUIZA
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Publication number: 20110308673Abstract: A hot-rolled austenitic manganese steel strip having a chemical composition in percent by weight of 0.4%?C?1.2%, 12.0%?Mn?25.0%, P?0.01% and Al?0.05% has a product of elongation at break in % and tensile strength in MPa of above 65,000 MPa %, in particular above 70,000 MPa %. A cold-rolled austenitic manganese steel strip having the same chemical composition achieves a product of elongation at break in % and tensile strength in MPa of above 75,000 MPa %, in particular above 80,000 MPa %.Type: ApplicationFiled: May 11, 2011Publication date: December 22, 2011Applicant: voestalpine Stahl GmbHInventors: Reinhold Schneider, Ludovic Samek, Enno Arenholz, Klemens Mraczek, Mario Hartl
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Patent number: 8052924Abstract: There is provided a high strength steel plate with high manganese having excellent burring workability, which is used for structural members, bumper reinforcing materials and impact absorbing materials of automobiles, etc. The high strength steel plate includes, by weight: C: 0.2 to 1.0%, Mn: 10 to 25%, Al: 0.3 to 3.0%, S: 0.05% or less, P: 0.05% or less, and the balance of Fe and inevitable impurities, wherein the chemical elements satisfactorily have a grain size of 18 ?m or more. The high strength steel plate can be useful to facilitate formation of automobile parts since it has excellent physical properties such as elongation and hole expansibility as well as strength.Type: GrantFiled: December 20, 2007Date of Patent: November 8, 2011Assignee: PoscoInventors: Sung Kyu Kim, Kwang Geun Chin
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Patent number: 7976650Abstract: The invention relates to a process for manufacturing a corrosion-resistant cold-rolled sheet of iron-carbon-manganese austenitic steel, comprising the following steps: a sheet whose chemical composition comprises, the contents being expressed by weight: 0.35%?C?1.05%, 16%?Mn?24%, the balance of the composition consisting of iron and inevitable impurities resulting from its smelting, is provided; said sheet is cold-rolled; and a recrystallization annealing treatment is carried out on said sheet in a furnace containing a gas chosen from gases that are reducing with respect to iron, the parameters of said annealing being chosen in such a way that said sheet is covered on both its sides with an essentially amorphous (Fe,Mn)O oxide sublayer and with an external crystalline manganese oxide (MnO) layer, the total thickness of these two layers being equal to or greater than 0.5 microns.Type: GrantFiled: October 10, 2005Date of Patent: July 12, 2011Assignee: ARCELOR FranceInventors: Pascal Drillet, Daniel Bouleau
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Publication number: 20100258218Abstract: The present invention features a high-strength and light TWIP steel sheet which can be used to manufacture vehicle body parts, and a method of manufacturing the same.Type: ApplicationFiled: October 2, 2009Publication date: October 14, 2010Applicants: HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATIONInventors: Seung Hyun Hong, Se Jin Ko
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Patent number: 7799148Abstract: Iron-carbon-manganese austenitic steel sheet, the chemical composition of which comprises, the contents being expressed by weight: 0.45%?C?0.75%; 15%?Mn?26%; Si?3%; Al?0.050%; S?0.030%; P?0.080%; N?0.1%; at least one metal element chosen from vanadium, titanium, niobium, chromium and molybdenum, where 0.050%?V?0.50%; 0.040%?Ti?0.50; 0.070%?Nb?0.50%; 0.070%?Cr?2%; 0.14%?Mo?2%; and, optionally, one or more elements chosen from 0.0005%?B?0.003%; Ni?1%; Cu?5%, the balance of the composition consisting of iron and inevitable impurities resulting from the smelting, the amounts of said at least one metal element in the form of precipitated carbides, nitrides or carbonitrides being: 0.030%?Vp?0.150%; 0.030%?Tip?0.130%; 0.040%?Nbp?0.220%; 0.070%?Crp?0.6%; 0.14%?Mop?0.44%.Type: GrantFiled: January 10, 2006Date of Patent: September 21, 2010Assignee: Arcelor FranceInventors: Colin Scott, Philippe Cugy, Maurita Roscini, Anne Dez, Dominique Cornette
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Patent number: 7749431Abstract: A high-strength stainless steel, having good mechanical properties and corrosion resistance in a high-pressure hydrogen gas environment, is used as a container or other device for high-pressure hydrogen gas, and consists of, by mass %, C: not more than 0.04%, Si: not more than 1.0%, Mn: 7 to 30%, Cr: 15 to 22%, Ni: 5 to 20%, V: 0.001 to 1.0%, N: 0.20 to 0.50% and Al: not more than 0.10%, and the balance Fe and impurities. Among the impurities, P is not more than 0.030%, S is not more than 0.005%, and Ti, Zr and Hf are not more than 0.01% respectively, and the contents of Cr, Mn and N satisfy the relationship, 2.5Cr+3.4Mn?300N. The weld metal of the welded joint of the container or other device made of the said stainless steel satisfies the relationship, ?11?Nieq?1.1×Creq??8.Type: GrantFiled: April 18, 2005Date of Patent: July 6, 2010Assignee: Sumitomo Metal Industries, Ltd.Inventors: Masaaki Igarashi, Hiroyuki Semba, Mitsuo Miyahara, Kazuhiro Ogawa, Tomohiko Omura
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Patent number: 7708841Abstract: An austenitic, substantially ferrite-free steel alloy and a process for producing components therefrom. This Abstract is not intended to define the invention disclosed in the specification, nor intended to limit the scope of the invention in any way.Type: GrantFiled: December 2, 2004Date of Patent: May 4, 2010Assignees: Boehler Edelstahl GmbH & Co KG, Schoeller-Bleckmann Oilfield Technology GmbHInventors: Gabriele Saller, Herbert Aigner, Josef Bernauer, Raimund Huber
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Publication number: 20100037993Abstract: The present invention provides a TWIP steel sheet that has an austenite matrix structure and includes 15-25 wt % of manganese. The TWIP steel sheet has a recrystallization texture in which brass orientation is suppressed and {3 5 2} <2 2 1> is developed as its main orientation during heat treatment subsequent to cold rolling, and has an average plastic strain ratio of 1.2 or more, preferably 1.5 or more. Since this TWIP steel sheet has high workability and strength, complicated vehicle body components can be easily manufactured through a press molding process without cracking or rupturing.Type: ApplicationFiled: November 24, 2008Publication date: February 18, 2010Applicants: HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATIONInventors: So Youn Kim, Seung Hyun Hong
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Patent number: 7658883Abstract: Novel carbon-plus-nitrogen corrosion-resistant ferrous and austenitic alloys, apparatus incorporating an inventive alloy, and methods of making and using the apparatus are described. The corrosion-resistant ferrous and austenitic alloys comprise no greater than about 4 wt. % nickel, are characterized by a strength greater than about 700 MPa (100 ksi), and, when being essentially free of molybdenum (<0.3 wt. %), have minimum Pitting Resistance Equivalence (PRE) numbers of 20 and minimum Measure of Alloying for Corrosion Resistance numbers (MARC) of 30 because of the use of both carbon and nitrogen. The ferrous and austenitic alloys are particularly formulated for use in oilfield operations, especially sour oil and gas wells and reservoirs. This abstract allows a searcher or other reader to quickly ascertain the subject matter of the disclosure. It will not be used to interpret or limit the scope or meaning of the claims.Type: GrantFiled: December 18, 2006Date of Patent: February 9, 2010Assignee: Schlumberger Technology CorporationInventors: Manuel Marya, Rashmi Bhavsar
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Publication number: 20100012233Abstract: Disclosed herein is an ultra high strength TWIP steel sheet having an austenite matrix texture, comprising 0.15˜0.30 wt % of carbon, 0.01˜0.03 wt % of silicon, 15˜25 wt % of manganese, 1.2˜3.0 wt % of aluminum, 0.020 wt % or less of phosphorus, 0.001˜0.002 wt % of sulfur, and residual iron and other inevitable impurities, wherein the TWIP steel sheet is cold-rolled at a reduction ratio of 35˜40% per pass under a condition of 180˜220 Mpa in front and rear tension, and thus has an average plastic strain ratio of 1.2 or more. The ultra high strength TWIP steel sheet has an improved average plastic strain ratio and excellent formability because it has a developed Goss orientation.Type: ApplicationFiled: March 9, 2009Publication date: January 21, 2010Applicant: HYUNDAI MOTOR COMPANYInventor: Seung Hyun Hong
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Publication number: 20090308499Abstract: An austenitic steel sheet excellent in resistance to delayed cracking, the composition of said steel comprising, in weight: 0,35%<C<1,05%, 15%<Mn<26%, Si<3%, Al<0,050%, S<0,030%, P<0,080%, N<0,1%, at least one metallic element X chosen among vanadium, titanium, niobium, molybdenum, chromium: 0,050%<V<0,50%, 0,040%?Ti<0,50%, 0,070%<Nb<0,50%, 0,14%<Mo<2%, 0,070%<Cr<2% and optionally, one or several elements chosen among 0,0005%<B<0,010%, Ni<2%, Cu<5%, the remainder being iron and unavoidable impurities inherent to fabrication, including hydrogen, the quantity Xp of said at least one metallic element under the form of carbides, nitrides or carbonitrides being, in weight: 0,030%<VP<0,40%, 0,030%<Tip<0,50%, 0,040%<Nbp<0,40%, 0,14%<Mop<0,44%, 0,070%<Crp<0,6%, the hydrogen content IImax designating the maximal hydrogen content that can be measured from a series of at least five specimens, and the quantity Xp, in weight, bType: ApplicationFiled: July 6, 2007Publication date: December 17, 2009Applicants: ARCELORMITTAL FRANCE, THYSSENKRUPP STEEL AGInventors: Colin Scott, Philippe Cugy, Christian Allely
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Publication number: 20090165897Abstract: Substantially austenitic steel having high strength and good formability for cold rolling including (in weight percent): 0.05 to 1.0% C; 11.0 to 14.9% Mn; 1.0 to 5.0% Al; O to 2.5% Ni the remainder being iron and unavoidable impurities, wherein the microstructure includes at least 75% in volume of austenite, and wherein (Ni+Mn) is from 11.0 to 15.9%.Type: ApplicationFiled: February 1, 2006Publication date: July 2, 2009Applicant: Corus Staal BVInventor: Calum McEwan
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Publication number: 20080271823Abstract: Coating steel strips comprising, in % by weight, C: ?1.6%, Mn: 6-30%, Al: ?10%, Ni: ?10%, Cr: ?10%, Si: ?8%, Cu: ?3%, Nb: ?0.6%, Ti: ?0.3%, V: ?0.3%, P: ?0.1%, B: ?0.01%, the rest being iron and unavoidable impurities, and a method of forming steel strips are described. Up to now, such steel strips were not adequately coatable, with a metal coating ensuring outstanding corrosion-resistance and good welding properties. This is ensured by applying an aluminium layer to the steel strip before final annealing and applying the metal coating to said aluminium layer after final annealing.Type: ApplicationFiled: February 1, 2006Publication date: November 6, 2008Applicant: Thyssenkrupp Steel AGInventors: Harald Hofmann, Manfred Meurer, Bernd Schuhmacher, Slavcho Topalski
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Patent number: 7442264Abstract: The use is described, in the fabrication of apparatus and equipment used in refining and in petrochemicals (for example furnace, reactor or line elements), of a steel composition comprising: at most 0.25% C; more than 1% up to 10% Mn; 1.5% to 5% Si; at most 0.03% P; at most 0.03% S; 4% to 10% Cr; 0.5% to 2% Mo; at most 0.40% V; and at most 0.10% N; the complement to 100% being essentially iron. Steels comprising: at most 0.15% C; more than 2% up to 10% Mn; 1.5% to 5% Si; at most 0.03% P; at most 0.03% S; 4% to 10% Cr; more than 0.5% up to 2% Mo; at most 0.40% V; and at most 0.10% N; the complement to 100% being essentially iron; are themselves novel.Type: GrantFiled: February 27, 2004Date of Patent: October 28, 2008Assignee: Institute Francais du PetroleInventors: Francois Ropital, Xavier Longaygue
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Publication number: 20070209738Abstract: The present invention relates to a high strength and high toughness alloy with a low density and the method of making thereof. The alloy essentially comprises 15 to 33 wt % of manganese, 6 to 10 wt % of aluminum, 0.6 to 1.2 wt % of carbon, 0.1 to 1.0 wt % of silicon, and the balance of iron. The alloy has excellent properties of a density of 6.6 to 6.9 g/cm3, an elongation of 25 to 70%, and a tensile strength of 100 to 190 ksi. In particularly, and the alloy is useful for golf club heads with excellent properties. Further, the use of the alloy reduces pits and defects generated during the electroplating process of the heads. Therefore, the defect rate of the product is remarkably decreased so that the cost is reduced.Type: ApplicationFiled: October 23, 2006Publication date: September 13, 2007Applicant: National Chiao Tung UniversityInventors: Tzeng-Feng Liu, Jian-Wei Lee
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Patent number: 6908589Abstract: The purpose of the present invention is to provide high manganese cast iron containing spheroidal vanadium carbide and method for making which is nonmagnetic as well as superior mechanical properties such as wear-resistance and toughness, and further does not require a water toughing heat treatment which has been needed when nonmagnetic high manganese steel (high manganese cast steel) is obtained by crystallized spheroidal vanadium in austenite matrix, and the high manganese cast iron containing spheroidal vanadium carbide is comprised of C 1.5˜4.0 weight %, V 6˜15 weight %, Si 0.2˜4.0 weight %, Mn 10˜18 weight %, Mg 0.01˜0.1 weight %, remaining iron (Fe) and inevitable impurities, spheroidal vanadium carbide is crystallized within a structure.Type: GrantFiled: June 13, 2003Date of Patent: June 21, 2005Assignees: Osaka Prefecture, Kabushiki Kaisha Sankyogokin Chuzoasho, Okamoto Co., Ltd.Inventors: Tadashi Kitudo, Mamoru Takemura, Mituaki Matumuro, Hideto Matumoto, Takao Horie, Kazumichi Shimizu
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Patent number: 6692838Abstract: The invention includes a composition of matter which is resistant to metal dusting and a method for preventing metal dusting on metal surfaces exposed to carbon supersaturated environments.Type: GrantFiled: March 15, 2002Date of Patent: February 17, 2004Assignee: ExxonMobil Research and Engineering CompanyInventors: Trikur Anantharaman Ramanarayanan, ChangMin Chun
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Publication number: 20030145911Abstract: A steel strip or sheet steel having good cold formability and high-strength is described, comprising a light steel having (in weight-percent) C: ≦1.00%, Mn: 7.00-30.00%, Al: 1.00-10.00%, Si: >2.50-8.00%, Al+Si: >3.50-12.00%, B: >0.00-<0.01%, as well as alternately Ni: <8.00%, Cu: <3.00%, N: <0.60%, Nb: <0.30%, Ti: <0.30%, V: <0.30%, P: <0.01%, with the remainder iron and unavoidable impurities.Type: ApplicationFiled: February 6, 2003Publication date: August 7, 2003Inventors: Harald Hoffmann, Bernhard Engl, Manfred Menne, Thomas Heller, Werner Zimmermann
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Patent number: 6572713Abstract: An austenitic manganese steel microalloyed with nitrogen, vanadium and titanium used for castings such as mantles, bowls and jaws manufactured as wear components of crushers in the mining and aggregate industries, hammers used in scrap shredders, frogs and switches used in railway crossings and buckets and track shoes used in mining power shovels. These novel compositions exhibit a fine grain size having carbonitride precipitates that result in castings having a wear life 20-70% longer than prior art castings. The austenitic manganese steel includes, in weight percentages, the following: about 11.0% to 24.0% manganese, about 1.0% to 1.4% carbon, up to about 1% silicon, up to about 1.9% chromium, up to about 0.25% nickel, up to about 1.0% molybdenum, up to about 0.2% aluminum, up to about 0.25% copper, phosphorus and sulfur present as impurities in amounts of about 0.07% max and about 0.06% max. respectively, microalloying additions of titanium in the amounts of about 0.020-0.Type: GrantFiled: August 17, 2001Date of Patent: June 3, 2003Assignee: The Frog Switch and Manufacturing CompanyInventors: Jerzy W. Kucharczyk, Karl R. Funk, Bernd Kos
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Patent number: 6387192Abstract: The invention relates to an easily cold-workable, in particular easily deep-drawable ultra high strength austenitic lightweight construction steel with an ultimate tensile strength of up to 1100 MPa and with TRIP and TWIP characteristics, as well as its use for motor vehicle body sheetmetal components, structural components used for stiffening, as well as cryogenic containers and pipelines.Type: GrantFiled: December 29, 1999Date of Patent: May 14, 2002Inventors: Georg Frommeyer, Oliver Grässel
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Publication number: 20020048529Abstract: An austenitic manganese steel microalloyed with nitrogen, vanadium and titanium used for castings such as mantles, bowls and jaws manufactured as wear components of crushers in the mining and aggregate industries, hammers used in scrap shredders, frogs and switches used in railway crossings and buckets and track shoes used in mining power shovels. These novel compositions exhibit a fine grain size having carbonitride precipitates that result in castings having a wear life 20-70% longer than prior art castings. The austenitic manganese steel includes, in weight percentages, the following: about 11.0% to 24.0% manganese, about 1.0% to 1.4% carbon, up to about 1% silicon, up to about 1.9% chromium, up to about 0.25% nickel, up to about 1.0% molybdenum, up to about 0.2% aluminum, up to about 0.25% copper, phosphorus and sulfur present as impurities in amounts of about 0.07% max and about 0.06% max. respectively, microalloying additions of titanium in the amounts of about 0.020-0.Type: ApplicationFiled: August 17, 2001Publication date: April 25, 2002Applicant: The Frog Switch and Manufacturing CompanyInventors: Jerzy W. Kucharczyk, Karl R. Funk, Bernd Kos
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Patent number: 5634990Abstract: An Fe-Mn vibration damping alloy steel having a mixture structure of .epsilon., .alpha.' and .gamma.. The alloy steel consists of iron, manganese from 10 to 24% by weight and limited amounts of impurities. The alloy steel is manufactured by preparing an ingot at a temperature of 1000.degree. C. to 1300.degree. C. for 12 to 40 hours to homogenize the ingot and hot-rolling the homogenized ingot to produce a rolled alloy bar or plate, performing solid solution treatment on the alloy steel at 900.degree. C. to 1100.degree. C. for 30 to 60 minutes, cooling the alloy steel by air or water, and cold rolling the alloy steel at a reduction rate of greater than 0% and below 30% at around room temperature.Type: GrantFiled: August 25, 1995Date of Patent: June 3, 1997Assignee: Woojin Osk CorporationInventors: Chong-Sool Choi, Man-Eob Lee, Seung-Han Baek, Yong-Chul Son, Jeong-Cheol Kim, Joong-Hwan Jun, Young-Sam Ko
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Patent number: 5308408Abstract: A wear resisting steel of the Hadfield-type and method for its production are provided. This iron base alloy contains in its basic composition following alloying carbon, manganese, silicon and optionally chromium, and/or molybdenum, and/or tungsten. The matrix of the steel is formed by the ductile austenite. Carbides appear on the grain boundaries in the form of roundish, hard, separate precipitates. In the grain boundary zone and inside the grains are hard, needle-shaped nitride and carbonitrides to improve the wear resistance especially against abrasive wear. In accordance with the method the steel is solution heat treated at a temperature range below 1100.degree. C. (e.g., 950.degree. to below 1100.degree. C.) so that carbide, nitride and carbonitride precipitates formed in the microstructure following casting are partially but not completely dissolved.Type: GrantFiled: March 9, 1993Date of Patent: May 3, 1994Assignee: Lokomo OyInventor: Reijo Katila