Nickel Containing Patents (Class 420/38)
-
Patent number: 7475478Abstract: A method for making structural automotive components and the like includes providing a blank of air hardenable martensitic stainless steel in the annealed condition. The steel blank has a thickness in the range of 0.5-5.0 mm., and is formed utilizing stamping, forging, pressing, or roller forming techniques or the like into the form of an automotive structural member. The automotive structural member is then hardened by application of heat, preferably to between 950° C. and 1100° C. for standard martensitic stainless steels. Thereafter, the automotive structural member is preferably cooled at a rate greater than 25° C. per minute to achieve a Rockwell C hardness of at least 39. The automotive structural member may undergo additional heat treating processes including high temperature or low temperature tempering processes which may incorporate electro-coating.Type: GrantFiled: September 11, 2006Date of Patent: January 13, 2009Assignee: KVA, Inc.Inventors: Edward J. McCrink, Danny Codd
-
Publication number: 20090010793Abstract: A method for producing cold-formable, high-strength steel strips or sheets with TWIP properties, wherein in successive working steps are carried out without interruption, uses a molten material of the following composition (mass %): C: 0.003-1.50%, Mn: 18.00-30.00%, Ni: ?10.00%, Si: ?8.00%, Al: ?10.00%, Cr: ?10.00%, N: ?0.60%, Cu: ?3.00%, P: ?0.40%, S: ?0.15%, selectively one or more components from the Se, Te, V, Ti, Nb, B, REM, Mo, W, Co, Ca and Mg group provided that the total content of Se, Te is ?0.25%, the total content of V, Ti, Nb, B, REM is ?4.00%, the total content of Mo, W, Co is ?1.50% and the total content of Ca, Mg is ?0.50%, the rest being iron and melting conditioned impurities, wherein the content of Sn, Sb, Zr, Ta and As, whose total content is equal to or less than 0.30% is included in said impurities.Type: ApplicationFiled: November 3, 2004Publication date: January 8, 2009Applicant: THYSSENKRUPP STEEL AGInventors: Jens-Ulrik Becker, Harald Hofmann, Manfred Menne, Jochen Wans
-
Publication number: 20090004040Abstract: A ferritic stainless steel sheet for forming a raw material pipe for bellows pipe is excellent in formability and high-temperature properties (high-temperature salt corrosion resistance and high-temperature fatigue properties). Specifically, the ferritic stainless steel sheet for forming a raw material pipe for bellows pipe contains 0.015% by mass or less of C, 1.0% by mass or less of Si, 1.0% by mass or less of Mn, 0.04% by mass or less of P, 0.010% by mass or less of S, 11% to 19% by mass of Cr, 0.015% by mass or less of N, 0.15% by mass or less of Al, 1.25% to 2.5% by mass of Mo, 0.3% to 0.7% by mass of Nb, 0.0003% to 0.003% by mass of B, and the balance being Fe and incidental impurities. In the ferritic stainless steel sheet for forming a raw material pipe for bellows pipe, preferably, the average crystal grain diameter D of the steel sheet is 35 ?m or less, and alternatively, the surface roughness Ra of the steel sheet is 0.40 ?m or less.Type: ApplicationFiled: May 29, 2006Publication date: January 1, 2009Applicant: JFE STEEL CORPORATIONInventors: Yasushi Kato, Yoshihiro Ozaki, Osamu Furukimi, Norimasa Hirata, Takumi Ujiro
-
Publication number: 20080292489Abstract: An austenitic stainless steel alloy includes, in weight percent: >4 to 15 Mn; 8 to 15 Ni; 14 to 16 Cr; 2.4 to 3 Al; 0.4 to 1 total of at least one of Nb and Ta; 0.05 to 0.2 C; 0.01 to 0.02 B; no more than 0.3 of combined Ti+V; up to 3 Mo; up to 3 Co; up to 1W; up to 3 Cu; up to 1 Si; up to 0.05 P; up to 1 total of at least one of Y, La, Ce, Hf, and Zr; less than 0.05 N; and base Fe, wherein the weight percent Fe is greater than the weight percent Ni, and wherein the alloy forms an external continuous scale including alumina, nanometer scale sized particles distributed throughout the microstructure, the particles including at least one of NbC and TaC, and a stable essentially single phase FCC austenitic matrix microstructure that is essentially delta-ferrite-free and essentially BCC-phase-free.Type: ApplicationFiled: July 29, 2008Publication date: November 27, 2008Applicant: UT-BATTELLE, LLCInventors: Yukinori Yamamoto, Michael L. Santella, Michael P. Brady, Philip J. Maziasz, Chain-Tsuan Liu
-
Publication number: 20080274007Abstract: The present invention relates a high-strength nonmagnetic stainless steel, containing, by weight percent, 0.01 to 0.06% of C, 0.10 to 0.50% of Si, 20.5 to 24.5% of Mn, 0.040% or less of P, 0.010% or less of S, 3.1 to 6.0% of Ni, 0.10 to 0.80% of Cu, 20.5 to 24.5% of Cr, 0.10 to 1.50% of Mo, 0.0010 to 0.0050% of B, 0.010% or less of O, 0.65 to 0.90% of N, and the remainder being Fe and inevitable impurities; the steel satisfying the following formulae (1) to (4): [Cr]+3.3×[Mo]+16×[N]?30, ??(1) {Ni}/{Cr}?0.15, ??(2) 2.0?[Ni]/[Mo]?30.0, and ??(3) [C]×1000/[Cr]?2.5, ??(4) wherein [Cr], [Mo], [N], [Ni], [Mo] and [C] represent the content of Cr, the content of Mo, the content of N, the content of Ni, the content of Mo and the content of C in the steel, respectively, and {Ni} represents the sum of [Ni], [Cu] and [N], and {Cr} represents the sum of [Cr] and [Mo].Type: ApplicationFiled: May 2, 2008Publication date: November 6, 2008Applicant: DAIDO TOKUSHUKO KABUSHIKI KAISHAInventors: Koichi Ishikawa, Tetsuya Shimizu
-
Publication number: 20080274006Abstract: A submerged pot roll and other articles for use in galvanizing baths including a metallurgically bonded superalloy cladding layer on a steel core layer. The cladding layer improves the corrosion resistance and dross buildup of the article and improves service life while reducing costs.Type: ApplicationFiled: May 1, 2007Publication date: November 6, 2008Inventors: Mark Bright, Vinod K. Sikka, James W. Hales, Ravi Menon, Ever J. Barbero, Xingbo Liu, Jing Xu
-
Publication number: 20080233225Abstract: The invention relates to a powder metallurgically manufactured steel with a chemical composition containing, in % by weight: 0.01-2 C, 0.6-10 N, 0.01-3.0 Si, 0.01-10.0 Mn, 16-30 Cr, 0.01-5 Ni, 0.01-5.0 (Mo+W/2), 0.01-9 Co, max. 0.5 S and 0.5-14 (V+Nb/2), where the contents of N on the one hand and of (V+Nb/2) on the other hand are balanced in relation to each other such that the contents of these elements are within an area that is defined by the coordinates A?, B?, G, H, A?, where the coordinates of [N, (V+Nb/2)] are: A: [0.6,0.5]; B?: [1.6,0.5]; G: [9.8,14.0]; H: [2.6,14.0], and max. 7 of (Ti+Zr+Al), balance essentially only iron and impurities at normal amounts. The steel is intended to be used in the manufacturing of tools for injection moulding, compression moulding and extrusion of components of plastics, and for tools for cold working, which are exposed to corrosion.Type: ApplicationFiled: August 24, 2006Publication date: September 25, 2008Applicant: UDDEHOLM TOOLING AKTIEBOLAGInventors: Lennart Jonson, Odd Sandberg
-
Publication number: 20080138232Abstract: A duplex stainless steel alloy which contains in weight %: Cr 25-35%, Ni 4-10%, Mo 1-6%, N 0.3-0.6%, Mn greater than 0-3%, Si max 1.0%, C max 0.06%, Cu and/or W and/or Co 0.1-10%, W 0.1-5%, balance Fe and normally occurring impurities wherein the ferrite content is 30-70%. The alloy has a yield point in tension being min 760 MPa.Type: ApplicationFiled: November 4, 2005Publication date: June 12, 2008Inventors: Pasi Kangas, Karin Jakobsson
-
Publication number: 20080009368Abstract: A metal alloy applied to manufacture a club weight member of a golf club head includes carbon less than 0.08% by weight, silicon of about 0.5% to about 2.0% by weight, manganese of about 0.5% to about 2.0% by weight, nickel of about 5.0% to about 15.0% by weight, chromium of about 15.0% to about 30.0% by weight, tungsten of about 5.0% to about 15.0% by weight and the balance is essential iron. Accordingly, the metal alloy has a high degree of mechanical strength and extensibility, and functions as a weight material of the golf club head.Type: ApplicationFiled: July 6, 2006Publication date: January 10, 2008Inventors: Yan-Zhen Su, Huang-Min Lin
-
Patent number: 7235212Abstract: A nanocarbide precipitation strengthened ultrahigh-strength, corrosion resistant, structural steel possesses a combination of strength and corrosion resistance comprising in combination, by weight, about: 0.1 to 0.3% carbon (C), 8 to 17% cobalt (Co), 0 to 5% nickel (Ni), 6 to 12% chromium (Cr), less than 1% silicon (Si), less than 0.5% manganese (Mn), and less than 0.15% copper (Cu), with additives selected from the group comprising about: less than 3% molybdenum (Mo), less than 0.3% niobium (Nb), less than 0.8% vanadium (V), less than 0.2% tantalum (Ta), less than 3% tungsten (W), and combinations thereof, with additional additives selected from the group comprising about: less than 0.2% titanium (Ti), less than 0.2% lanthanum (La) or other rare earth elements, less than 0.15% zirconium (Zr), less than 0.005% boron (B), and combinations thereof, impurities of less than about: 0.02% sulfur (S), 0.012% phosphorus (P), 0.015% oxygen (O) and 0.Type: GrantFiled: February 8, 2002Date of Patent: June 26, 2007Assignee: Ques Tek Innovations, LLCInventors: Charles J. Kuehmann, Gregory B. Olson, Herng-Jeng Jou
-
Patent number: 7186304Abstract: A carbo-nitriding process for forming a martensitic stainless steel, which is case hardened and superior corrosion resistance over carburized process, is provided. A process for forming a martensitic stainless steel which is case hardened is provided. The process comprises the steps of providing a material consisting essentially of from 8.0 to 18 wt % chromium, cobalt up to 16 wt %, vanadium up to 5.0 wt %, molybdenum up to 8.0 wt %, nickel up to 8.0 wt %, manganese up to 4.0 wt %, silicon up to 2.0 wt %, tungsten up to 6.0 wt %, titanium up to 2.0 wt %, niobium up to 4.0 wt % and the balance iron, and carbo-nitriding to prescribed levels of C+N, to form a hard, corrosion resistance case in a fracture tough stainless steel.Type: GrantFiled: June 2, 2004Date of Patent: March 6, 2007Assignee: United Technologies CorporationInventors: Herbert A. Chin, William P. Ogden, David A. Haluck
-
Patent number: 7160399Abstract: A nanocarbide precipitation strengthened ultrahigh-strength, corrosion resistant, structural steel possesses a combination of strength and corrosion resistance comprising in combination, by weight, about: 0.1 to 0.3% carbon (C), 8 to 17% cobalt (Co), 0 to 10% nickel (Ni), 6 to 12% chromium (Cr), less than 1% silicon (Si), less than 0.5% manganese (Mn), and less than 0.15% copper (Cu), with additives selected from the group comprising about: less than 3% molybdenum (Mo), less than 0.3% niobium (Nb), less than 0.8% vanadium (V), less than 0.2% tantalum (Ta), less than 3% tungsten (W), and combinations thereof, with additional additives selected from the group comprising about: less than 0.2% titanium (Ti), less than 0.2% lanthanum (La) or other rare earth elements, less than 0.15% zirconium (Zr), less than 0.005% boron (B), and combinations thereof, impurities of less than about: 0.02% sulfur (S), 0.012% phosphorus (P), 0.015% oxygen (O) and 0.Type: GrantFiled: February 6, 2003Date of Patent: January 9, 2007Assignee: QuesTek Innovations LLCInventors: Charles J. Kuehmann, Gregory B. Olson, Herng-Jeng Jou
-
Patent number: 6881280Abstract: An iron-based corrosion resistant and wear resistant alloy is addressed. The alloy contains (in weight percent) 1.1-1.4% carbon, 11-14.25% chromium, 4.75-6.25% molybdenum, 3.5-4.5% tungsten, 0-3% cobalt, 1.5-2.5% niobium, 1-1.75% vanadium, 0-2.5% copper, up to 1.0% silicon, up to 0.8% nickel, up to 0.6% manganese, and the balance iron. The alloy is suitable for use in valve seat insert applications.Type: GrantFiled: August 15, 2002Date of Patent: April 19, 2005Assignee: L.E. Jones CompanyInventor: Cong Yue Qiao
-
Patent number: 6841122Abstract: A hot working die steel contains 0.05-0.25% C, 0.30% or less Si, 0.03% or less Mn, 1.0% or less Ni, 5.0-13.0 % Cr, 2.0% or less Mo, 1.0-8.0% W, 1.0-10.0% Co, 0.003-0.020% B, 0.005-0.050% N, and the balance consisting essentially of Fe and unavoidable impurities. If desired, the hot working die steel may further contain 0.01-1.0% V and 0.01-1.0% of at least one kind selected from Nb and Ta.Type: GrantFiled: April 29, 2002Date of Patent: January 11, 2005Assignee: The Japan Steel Works, Ltd.Inventors: Rinzo Kayano, Eiji Maeda
-
Publication number: 20040258554Abstract: A corrosion and erosion resistant alloy comprising as mandatory elements besides iron, in % by weight, about 31 to about 48 chromium, about 0.01 to about 0.7 nitrogen, about 0.5 to about 30 manganese and about 0.3 to about 2.5 carbon. This abstract is neither intended to define the invention disclosed in this specification nor intended to limit the scope of the invention in any way.Type: ApplicationFiled: January 30, 2004Publication date: December 23, 2004Inventor: Roman Radon
-
Publication number: 20040206427Abstract: An austenitic stainless steel which comprises, on the percent by mass basis, C: 0.03-0.12%, Si: 0.2 -2%, Mn: 0.1-3%, P: 0.03% or less, S: 0.01% or less, Ni: more than 18% and less than 25%, Cr: more than 22% and less than 30%, Co: 0.04-0.8%, Ti: 0.002% or more and less than 0.01%, Nb: 0.1-1%, V:0.01 -1%, B: more than 0.0005% and 0.2% or less, sol. Al: 0.0005% or more and less than 0.03%, N: 0.1-0.35% and 0 (Oxygen): 0.001-0.008%, with the balance being Fe and impurities can be utilized as materials such as steel tubes used as a superheater tube, reheater tube for a boiler and a furnace tube for the chemical industry, and a steel plate, a steel bar and a steel forging and the like, which are used as a heat resistant, pressure-tight member, whereby extremely large effects on the promotion of increasing high temperature and high pressure steam in a boiler for an electric power-generation can be obtained.Type: ApplicationFiled: January 21, 2004Publication date: October 21, 2004Inventors: Atsuro Iseda, Hiroyuki Semba
-
Publication number: 20040042926Abstract: A high-Si stainless steel excellent in various characteristics, inclusive of strength, corrosion resistance, workability and castability, consists of, on the mass % basis, Si: 2 to 5%, Cr: 8 to 25%, Ni: 4 to 16%, Mn: not more than 5%, Cu: not more than 4%, Co: not more than 8%, Mo: not more than 4%, Nb: not more than 3%, Ta: not more than 3%, Ti: not more than 3%, W: not more than 4%, V: not more than 4%, B: not more than 0.01%, Mg: not more than 0.01%, Ca: not more than 0.01%, rare earth elements: not more than 0.01%, the balance being Fe. Impurities in this steel are as follows: C: not more than 0.04%, P: not more than 0.03%, S: not more than 0.02%, Al: not more than 0.03%, N (nitrogen): not more than 0.05%, O (oxygen): not more than 0.005%, and H (hydrogen): not more than 0.0003%.Type: ApplicationFiled: September 2, 2003Publication date: March 4, 2004Inventor: Yoshiyuki Shimizu
-
Patent number: 6630103Abstract: A precipitation hardenable stainless steel having the following weight percent composition is disclosed. C 0.030 max. Mn 0.5 max. Si 0.5 max. P 0.040 max. S 0.025 max. Cr 9-13 Ni 7-9 Mo 3-6 Cu 0.75 max. Co 5-11 Ti 1.0 max. Al 1.0-1.5 Nb 1.0 max. B 0.010 max. N 0.030 max. O 0.020 max. The balance of the alloy is essentially iron and the usual impurities. One or more rare earth metals or calcium may be included in the alloy for removing and/or stabilizing phosphorus and sulfur. The alloy provides a unique combination of strength, toughness, and ductility. In accordance with another aspect of the present invention, there is described a useful article such as an aircraft structural component or a golf club head that is formed, at least in part, from the aforesaid alloy.Type: GrantFiled: March 26, 2002Date of Patent: October 7, 2003Assignee: CRS Holding, Inc.Inventors: James W. Martin, Theodore Kosa
-
Publication number: 20030138342Abstract: A martensitic stainless steel sheet having superior corrosion resistance, toughness at the weld zones, and workability. The composition of the steel sheet is, on a mass basis: less than about 0.02% of carbon; about 1.0% or less of silicon; less than about 1.5% of manganese; about 0.04% or less of phosphorus; about 0.01% or less of sulfur; about 0.1% or less of aluminum; about 1.5% or more and less than about 4.0% of nickel; about 11% or more and less than about 15% of chromium; about 0.5% or more and less than about 2.0% of molybdenum; and less than about 0.02% of nitrogen, the balance being iron and unavoidable impurities, wherein 15.0%≦[Cr]+1.5×[Mo]+1.2×[Ni]≦20.0%; [C]+[N]<0.030%; [Ni]+0.5×([Mn]+[Mo])+30×[C]>3.0%; and 8.Type: ApplicationFiled: December 23, 2002Publication date: July 24, 2003Applicant: Kawasaki Steel CorporationInventors: Junichiro Hirasawa, Takumi Ujiro, Osamu Furukimi
-
Patent number: 6592685Abstract: The invention relates to a transformation controlled nitride precipitation hardening heat-treatable steel with the following composition (data in wt. %): 15-18 Cr, max. 0.5 Mn, 4-10 Ni, max. 15 Co, max. 4 W, max. 4 Mo, 0.5-1 V, at least one of Nb, Ta, Hf and Zr totaling between 0.001-0.1, 0.001-0.05 Ti, max. 0.5 Si, max. 0.05 C, 0.13-0.25 N, max. 4 Cu, rest iron and usual impurities, under the condition that the weight ratio of vanadium to nitrogen V/N is in the range between 3.5 and 4.2. The invention also relates to a heat treatment process for this steel. Very good strength, ductility and also corrosion resistance can be attained.Type: GrantFiled: December 5, 2001Date of Patent: July 15, 2003Assignee: Alstom (Switzerland) LtdInventor: Alkan Goecmen
-
Publication number: 20030103860Abstract: An iron-based corrosion resistant and wear resistant alloy is addressed. The alloy contains (in weight percent) 1.1-1.4% carbon, 11-14.25% chromium, 4.75-6.25% molybdenum, 3.5-4.5% tungsten, 0-3% cobalt, 1.5-2.5% niobium, 1-1.75% vanadium, 0-2.5% copper, up to 1.0% silicon, up to 0.8% nickel, up to 0.6% manganese, and the balance iron. The alloy is suitable for use in valve seat insert applications.Type: ApplicationFiled: August 15, 2002Publication date: June 5, 2003Inventor: Cong Yue Qiao
-
Publication number: 20030072671Abstract: A nanocarbide precipitation strengthened ultrahigh-strength, corrosion resistant, structural steel possesses a combination of strength and corrosion resistance comprising in combination, by weight, about: 0.1 to 0.3% carbon (C), 8 to 17% cobalt (Co), 0 to 5% nickel (Ni), 6 to 12% chromium (Cr), less than 1% silicon (Si), less than 0.5% manganese (Mn), and less than 0.15% copper (Cu), with additives selected from the group comprising about: less than 3% molybdenum (Mo), less than 0.3% niobium (Nb), less than 0.8% vanadium (V), less than 0.2% tantalum (Ta), less than 3% tungsten (W), and combinations thereof, with additional additives selected from the group comprising about: less than 0.2% titanium (Ti), less than 0.2% lanthanum (La) or other rare earth elements, less than 0.15% zirconium (Zr), less than 0.005% boron (B), and combinations thereof, impurities of less than about: 0.02% sulfur (S), 0.012% phosphorus (P), 0.015% oxygen (O) and 0.Type: ApplicationFiled: February 8, 2002Publication date: April 17, 2003Applicant: QuesTek Innovations Ltd.Inventors: Charles J. Kuehmann, Gregory B. Olson, Herng-Jeng Jou
-
Publication number: 20030049153Abstract: A precipitation hardenable stainless steel having the following weight percent composition is disclosed. 1 C 0.030 max. Mn 0.5 max. Si 0.5 max. P 0.040 max. S 0.025 max. Cr 9-13 Ni 7-9 Mo 3-6 Cu 0.75 max. Co 5-11 Ti 1.0 max. Al 1.0-1.5 Nb 1.0 max. B 0.010 max. N 0.030 max. O 0.020 max.Type: ApplicationFiled: March 26, 2002Publication date: March 13, 2003Inventors: James W. Martin, Theodore Kosa
-
Publication number: 20020182099Abstract: A hot working die steel contains 0.05-0.25% C, 0.30% or less Si, 0.30% or less Mn, 1.0% or less Ni, 5.0-13.0% Cr, 2.0% or less Mo, 1.0-8.0% W, 1.0-10.0% Co, 0.003-0.020% B, 0.005-0.050% N, and the balance consisting essentially of Fe and unavoidable impurities. If desired, the hot working die steel may further contain 0.01-1.0% V and 0.01-1.0% of at least one kind selected from Nb and Ta.Type: ApplicationFiled: April 29, 2002Publication date: December 5, 2002Applicant: THE JAPAN STEEL WORKS, LTD.Inventors: Rinzo Kayano, Eiji Maeda
-
Patent number: 6485679Abstract: A heat resistant austenitic stainless steel with high strength at elevated temperatures, good steam oxidation resistance, good fire side corrosion resistance, and a sufficient structural stability, suitable for use in boilers operating at high temperatures has a composition (by weight) of. 0.04 to 0.10% carbon (C), not more than 0.4% silicon (Si), not more than 0.6% manganese (MN), 20 to 27% chromium (Cr), 22.5 to 32% nickel (Ni), not more than 0.5% molybdenum (Mo), 0,20 to 0.60% niobium (Nb), 0.4 to 4.0% tungsten (W), 0.10 to 0.30% nitrogen (N), 0.002 to 0.008% boron (B), less than 0.05% aluminium (Al), at least one of the elements Mg and Ca in amounts less than 0.010% Mg and less than 0.010% Ca, and the balance being iron and inevitable impuities.Type: GrantFiled: February 16, 2000Date of Patent: November 26, 2002Assignee: Sandvik ABInventors: Ann Sundström, Goucai Chai
-
Patent number: 6485678Abstract: A unique iron base alloy for wear resistant applications, characterized in one aspect by its hardening ability when exposed to a certain temperature range, is useful for valve seat insert applications. The alloy also possesses excellent wear resistance, hot hardness and oxidation resistance. The alloy comprises less than 0.1 wt % carbon; about 18 to about 32 wt % molybdenum, about 6 to about 15 wt % chromium, about 1.5 to about 3% silicon, about 8 to about 15 wt % cobalt and at least 40% iron, with less than 0.5 wt % nickel. In another aspect, for lower temperature applications, the cobalt is optional, the nickel content can be up to 14 wt %, but the molybdenum must be in the range of about 29% to about 36%. In one further aspect, for higher temperature applications, the cobalt is optional, but may be used up to 15 wt %, nickel must be used at a level of between about 3 and about 14 wt %, and the molybdenum will be in the range of about 26 to about 36 wt %.Type: GrantFiled: June 20, 2000Date of Patent: November 26, 2002Assignee: Winsert Technologies, Inc.Inventors: Xuecheng Liang, Gary R. Strong
-
Patent number: 6479013Abstract: A method of casting non-ferrous metals such as aluminum, magnesium, or zinc alloys uses casting components made from a tool steel comprising effective amounts of carbon, silicon, manganese, chromium, molybdenum, and vanadium, optional amounts of cobalt and increased level of molybdenum. Using the tool steel as a casting component, particularly as a mold, provides improvements in corrosion resistance, oxidation resistance, softening resistance, degradation resistance and deformation resistance. The tool steel casting component has a chromium oxide layer which is formed, in one mode, during the casting operation, to enhance the life and durability of the casting component and improve its casting performance.Type: GrantFiled: August 10, 2000Date of Patent: November 12, 2002Assignee: Sumitomo Metal Industries, Ltd.Inventors: Tomoaki Sera, Masahide Umino, Kunio Kondo
-
Patent number: 6464804Abstract: The invention relates to a martensitic-hardenable heat-treated steel, having the following composition (data in % by weight): 9 to 13% Cr, 0.001 to 0.25% Mn, 2 to 7% Ni, 0.001 to 8% Co, at least one of W and Mo in total between 0.5 and 4%, 0.5 to 0.8% V, at least one of Nb, Ta, Zr and Hf in total between 0.001 and 0.1%, 0.001 to 0.05% Ti, 0.001 to 0.15% Si, 0.01 to 0.1% C, 0.12 to 0.18% N, at most 0.025% P, at most 0.015% S, at most 0.01% Al, at most 0.0012% Sb, at most 0.007% Sn, at most 0.012% As, remainder iron and customary impurities, and the proviso that the ratio by weight of vanadium to nitrogen V/N lies in the range between 3.5 and 4.2. After solution annealing at 1050 to 1250° C., cooling to a temperature below 300° C., tempering treatment, partial or complete reaustenitization at 600 to 900° C., cooling to a temperature below 300° C. and annealing at a temperature from 550 to 650° C., it has a high resistance to heat combined, at the same time, with a high ductility.Type: GrantFiled: May 4, 2001Date of Patent: October 15, 2002Assignee: Alstom (Switzerland) LtdInventors: Alkan Goecmen, Peter Ernst
-
Patent number: 6426039Abstract: Ferritic stainless steel comprising all three of Co, V, and B, having a Co content of about 0.01 mass % to about 0.3 mass %, a V content of about 0.01 mass % to about 0.3 mass %, and a B content of about 0.0002 mass % to about 0.0050 mass %, and having superior secondary working embrittleness resistance and superior high temperature fatigue characteristics.Type: GrantFiled: June 27, 2001Date of Patent: July 30, 2002Assignee: Kawasaki Steel CorporationInventors: Junichiro Hirasawa, Atsushi Miyazaki, Mineo Muraki, Susumu Satoh
-
Patent number: 6419453Abstract: The main object of the present invention is to provide a steam turbine rotor shaft whose high-temperature strength is excellent at a selected temperature of 650 degrees C. A steam turbine rotor shaft comprising 0.05% to 0.20% by weight of carbon, 0.20% or less by weight of silicon, 0.05% to 1.5% by weight of manganese, 0.01% to 1.0% by weight of nickel, 9.0% to 13.0% by weight of chrome, 0.05% to 2.0% by weight of molybdenum, 0.5% to 5.0% by weight of tungsten, 0.05% to 0.30% by weight of vanadium, 0.01% to 0.20% by weight of niobium, 0.5% to 10.0% by weight of cobalt, 0.01% to 0.1% by weight of nitrogen, 0.001% to 0.030% by weight of boron, 0.0005% to 0.006% by weight of aluminum, and the remaining parts substantially comprising iron and inevitable impurities.Type: GrantFiled: March 5, 2001Date of Patent: July 16, 2002Assignees: Hitachi, Ltd., The Japan Steel Works, Ltd.Inventors: Yutaka Fukui, Hiroyuki Doi, Masahiko Arai, Ryo Hiraga, Kenichiro Nomura, Toshio Fujita, Yasuhiko Tanaka
-
Publication number: 20020061257Abstract: Disclosed is an austenitic stainless cast steel which has such a good heat resistance as can be used at a high temperature higher than 950° C. and a good machinability. The stainless cast steel consists essentially of, by weight %, C: 0.2-0.4%, Si: 0.5-2.0%, Mn: 0.5-2.0%, P: up to 0.10%, S: 0.04-0.2%, Ni: 8.0-42.0%, Cr: 15.0-28.0%, W: 0.5-7.0%, Nb: 0.5-2.0%, Al: up to 0.02%, Ti: up to 0.05%, N: up to 0.15%, Se: 0.001-0.50% and the balance of Fe and inevitable impurities.Type: ApplicationFiled: September 20, 2001Publication date: May 23, 2002Inventors: Shuji Hamano, Michio Okabe
-
Publication number: 20020051909Abstract: Cobalt-based alloys are provided for use as a positive electrode current collector in a solid cathode, nonaqueous liquid electrolyte, alkali metal anode active electrochemical cell. The cobalt-based alloys are characterized by chemical compatibility with aggressive cell environments, high corrosion resistance and resistance to fluorination and passivation at elevated temperatures, thus improving the longevity and performance of the electrochemical cell. The cell can be of either a primary or a secondary configuration.Type: ApplicationFiled: July 12, 2001Publication date: May 2, 2002Inventors: Christine A. Frysz, Sally Ann Smesko, Peter A. Kreidler, W. Richard Brown, Esther S. Takeuchi
-
Publication number: 20020007876Abstract: Ferritic stainless steel comprising all three of Co, V, and B, having a Co content of about 0.01 mass % to about 0.3 mass %, a V content of about 0.01 mass % to about 0.3 mass %, and a B content of about 0.0002 mass % to about 0.0050 mass %, and having superior secondary working embrittleness resistance and superior high temperature fatigue characteristics.Type: ApplicationFiled: June 27, 2001Publication date: January 24, 2002Applicant: Kawasaki Steel CorporationInventors: Junichiro Hirasawa, Atsushi Miyazaki, Mineo Muraki, Susumu Satoh
-
Patent number: 6306544Abstract: Cobalt-based alloys are provided for use as a positive electrode current collector in a solid cathode, nonaqueous liquid electrolyte, alkali metal anode active electrochemical cell. The cobalt-based alloys are characterized by chemical compatibility with aggressive cell environments, high corrosion resistance and resistance to fluorination and passivation at elevated temperatures, thus improving the longevity and performance of the electrochemical cell. The cell can be of either a primary or a secondary configuration.Type: GrantFiled: February 25, 1999Date of Patent: October 23, 2001Assignee: Wilson Greatbatch Ltd.Inventors: Christine A. Frysz, Sally Ann Smesko, Peter A. Kreidler, W. Richard Brown, Esther S. Takeuchi
-
Patent number: 6290904Abstract: This invention relates to welding materials for high-Cr steels which exhibit higher toughness and improved creep characteristics. Specifically, this invention relates to a welding material for high-Cr steels which contains, on a weight percentage basis, 0.03 to 0.12% C, up to 0.3% Si, 0.2 to 1.5% Mn, up to 0.02% P, up to 0.01% S, 8 to 13% Cr, 0.5 to 3% Mo, up to 0.75% Ni, 0.15 to 0.3% V, up to 0.01% Nb, 0.05 to 0.3% Ta, 0.1 to 2.5% W, 0.01 to 0.75% Cu, up to 0.03% Al, 0.002 to 0.005% B, up to 0.015% N, and up to 0.01% O, the balance being Fe and incidental impurities. It also relates to such welding materials wherein W is optionally excluded from the aforesaid composition, wherein W is excluded and 0.1 to 3% Co is added, or wherein 0.1 to 3% Co is added to the aforesaid composition.Type: GrantFiled: January 20, 1999Date of Patent: September 18, 2001Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Takayuki Kawano, Kaneyasu Ishikawa, Nobuhiko Nishimura, Iwami Ishihara, Mitsushige Kumou, Tamao Takatsu, Takashi Inami
-
Patent number: 6221183Abstract: A high-strength low-thermal-expansion alloy consisting of, by weight, 0.06 to 0.50% C, 25 to 65% in total of one or both of 65% or less Co and less than 30% Ni, and balance of Fe as a main component, other optional elements and unavoidable impurities, and having a primary phase of austenite phase and martensite phase induced by working. A wire is made from the alloy.Type: GrantFiled: November 15, 1993Date of Patent: April 24, 2001Assignee: Hitachi Metals, Ltd.Inventors: Koji Sato, Rikizo Watanabe, Takehiro Ohno, Yoshiki Masugata, Minoru Takuwa, Shigeaki Sato, Yoshimi Senda
-
Patent number: 6207103Abstract: Fe—Cr—Si steel sheet having an excellent corrosion resistance and high toughness and method for manufacturing the same; the amount of Cr is about 10-30 wt %, the total amount of C and N is not more than about 100 ppm and the remainder consists of Fe and incidental impurities; when a cast piece of this steel is subjected to hot rolling to roll into a thickness of not more than about 3 mm, the hot rolled sheet can be subjected to cold rolling or to warm rolling without annealing.Type: GrantFiled: July 29, 1998Date of Patent: March 27, 2001Assignee: Kawasaki Steel CorporationInventors: Shigeaki Takajo, Takako Yamashita, Akihiro Matsuzaki, Osamu Kondo
-
Patent number: 6193469Abstract: A high toughness heat-resistant steel, a turbine rotor formed of this steel and a method of producing the turbine rotor are described. The heat-resistant steel has a composition consisting essentially of: 0.05 to 0.30 wt % C, 0 to 0.20 wt % Si, 0 to 1.0 wt % Mn, 8.0 to 14.0 wt % Cr, 0.5 to 3.0 wt % Mo, 0.10 to 0.50 wt % V, 2.0 to 5.0 wt % Ni, 0.01 to 0.50 wt % Nb, 0.01 to 0.08 wt % N, 0.001 to 0.020 wt % B, balance Fe and unavoidable impurities. The steel has excellent characteristics in not only tensile strength and toughness at a relatively low temperature condition of a steam turbine such as high/low pressure combined type one but also creep rupture strength at a high temperature condition of this turbine.Type: GrantFiled: March 24, 1998Date of Patent: February 27, 2001Assignee: Kabushiki Kaisha ToshibaInventors: Yoichi Tsuda, Ryuichi Ishii, Masayuki Yamada
-
Patent number: 6123504Abstract: A steam turbine includes a rotor shaft, movable blades assembled on the rotor shaft, fixed blades for guiding inflow of steam to the moving blades, and an inner casing for holding the fixed blades. The rotor shaft and at least a first stage of the movable blades are made of high-strength martensitic steel comprising 0.05-0.20(%) of C, at most 0.15(%) of Si, 0.3-0.7(%) of Mn, 9.5-13(%) of Cr, 0.3-0.7(%) of Ni, 0.05-0.35(%) of V, 0.02-0.15(%) of Nb, 0.01-0.06(%) of N, 0.05-0.5(%) of Mo, 1.0-3.5(%) of W, 2-10(%) of Co and 0.0005-0.03(%) of B and at least 78(%) of Fe (the percentages being given in terms of weight). The inner casings is made of martensitic cast steel comprising 0.06-0.16(%) of C, at most 0.5(%) of Si, at most 1(%) of Mn, 0.2-1.0(%) of Ni, 8-12(%) of Cr, 0.05-0.35(%) of V, 0.01-0.15(%) of Nb, 0.01-0.1(%) of N, at most 1.5% of Mo, 1-4(%) of W and 0.0005-0.03(%) of B and at least 85(%) of Fe (the percentages being given in terms of weight).Type: GrantFiled: February 21, 1995Date of Patent: September 26, 2000Assignee: Hitachi, Ltd.Inventors: Masao Shiga, Ryo Hiraga, Takeshi Onoda, Nobuo Shimizu, Norio Yamada, Mitsuo Kuriyama, Kishio Hidaka, Shigeyoshi Nakamura, Yutaka Fukui, Toshio Fujita
-
Patent number: 6123897Abstract: A heat resistant material and a pressure vessel by use thereof, having an excellent high temperature strength so as to be applicable to steam condition of 600.degree. C. or more, are provided. Said material consists of C, Si, Cr, Ni, V, Nb, N, Mo and W in the respective weight percent, and inevitable impurities and Fe, and is further added with Cu, B and Ca and/or Mn, Mn and Cu, B and Ca, in the respective weight percent. Also, a pressure vessel is formed of said materials.Type: GrantFiled: July 23, 1999Date of Patent: September 26, 2000Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Akitsugu Fujita, Masatomo Kamata, Yasunori Tashiro, Koji Morinaka
-
Patent number: 6117388Abstract: Alloy steel containing 0.10 to 0.50 wt % of C, 0.5 wt % or less of Si, 1.5 wt % or less of Mn, 1.5 wt % or less of Ni, 3.0 to 13.0 wt % of Cr, 0 to 3.0 wt % of Mo, 1.0 to 8.0 wt % of W, 0.01 to 1.0 wt % of V, 0.01 to 1.0 wt % of Nb, 1.0 to 10.0 wt % of Co, 0.003 to 0.04 wt % of B, and 0.005 to 0.05 wt % of N, the balance comprising Fe and unavoidable impurities.Type: GrantFiled: March 5, 1999Date of Patent: September 12, 2000Assignee: The Japan Steel Works, Ltd.Inventors: Takashi Shibata, Eiji Maeda
-
Patent number: 6106766Abstract: A material for a gas turbine disk comprises 0.05 to 0.15 wt % of carbon, 0.10 wt % or less of silicon, 0.40 wt % or less of manganese, 9.0 to 12.0 wt % of chromium, 1.0 to 3.5 wt % of nickel, 0.50 to 0.90 wt % of molybdenum, 1.0 to 2.0 wt % of tungsten, 0.10 to 0.30 wt % of vanadium, 0.01 to 0.10 wt % of niobium, 0.01 to 0.05 wt % of nitrogen, and a remainder comprising iron and unavoidable impurities, wherein the contents of nickel, molybdenum and tungsten satisfy a relationship -1.5 wt %.ltoreq.Mo+W/2-Ni.ltoreq.0.7 wt %. Accordingly, unlike conventional gas turbine disk materials such as a heat resisting steel of 12Cr-type which can be used in an operation at about 400.degree. C., but has reduced toughness and high-temperature creep characteristics in an operation at about 500.degree. C., this material is allowed to have a satisfactory toughness and excellent high-temperature creep characteristics and can be suitably used at high temperatures.Type: GrantFiled: January 26, 1999Date of Patent: August 22, 2000Assignees: Kabushiki Kaisha Kobe Seiko Sho, Mitsubishi Heavy Industries, Ltd.Inventors: Hisataka Kawai, Yoshikuni Kadoya, Koji Takahashi, Ryotaro Magoshi, Yasuhiko Yasumoto, Tomohiro Tsuchiyama
-
Patent number: 6095756Abstract: This invention relates to high-Cr precision casting materials containing carbon, silicon, manganese, chromium, nickel, vanadium, niobium, nitrogen, molybdenum, tungsten, cobalt and optionally boron in specific weight proportions, the balance being iron and incidental impurities, as well as turbine blades made by a precision casting process using these materials. Thus, the present invention provides high-Cr precision casting materials which are capable of precision casting and, moreover, have excellent high-temperature strength, as well as inexpensive and highly reliable turbine blades made by using these casting materials and such turbine blades also having lighter weight.Type: GrantFiled: March 3, 1998Date of Patent: August 1, 2000Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Akitsugu Fujita, Masatomo Kamada, Hiroshi Yokota, Mitsuyoshi Tsuchiya, Yoshinori Tanaka
-
Patent number: 6030469Abstract: A fully martensitic quenching and tempering steel (AP) essentially consists of (measured in % by weight): 8 to 15% of Cr, up to 15% of Co, up to 4% of Mn, up to 4% of Ni, up to 8% of Mo, up to 6% of W, 0.5 to 1.5% of V, up to 0.15% of Nb, up to 0.04% of Ti, up to 0.4% of Ta, up to 0.02% of Zr, up to 0.02% of Hf, at most 50 ppm of B, up to 0.1% of C and 0.12-0.25% of N, the content of Mn+Ni being less than 4% and the content of Mo+W being less than 8%, the remainder being iron and usual impurities resulting from smelting.Type: GrantFiled: March 20, 1998Date of Patent: February 29, 2000Assignee: ABB Research Ltd.Inventors: Peter Ernst, Peter Uggowitzer, Markus Speidel, Alkan Gocmen
-
Patent number: 6007767Abstract: A heat resistant material and a pressure vessel by use thereof, having an excellent high temperature strength so as to be applicable to steam condition of 600.degree. C. or more, are provided. Said material consists of C, Si, Cr, Ni, V, Nb, N, Mo and W in the respective weight percent, and inevitable impurities and Fe, and is further added with Cu, B and Ca and/or Mn, Mn and Cu, B and Ca, in the respective weight percent. Also, a pressure vessel is formed of said materials.Type: GrantFiled: January 16, 1998Date of Patent: December 28, 1999Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Akitsugu Fujita, Masatomo Kamata, Yasunori Tashiro, Koji Morinaka
-
Patent number: 5997806Abstract: This invention provides a heat-resisting cast steel which is a high-Cr steel material having excellent high-temperature strength and hence suitable for use as a high-temperature steam turbine casing material capable of being used even at a steam temperature of 600.degree. C. or above. This heat-resisting cast steel contains, on a weight percentage basis, 0.07 to 0.15% carbon, 0.05 to 0.30% silicon, 0.1 to 1% manganese, 8 to 10% chromium, 0.01 to 0.2% nickel, 0.1 to 0.3% vanadium, a total of 0.01 to 0.2% niobium and tantalum, 0.1 to 0.7% molybdenum, 1 to 2.5% tungsten, 0.1 to 5% cobalt and 0.03 to 0.07% nitrogen, the balance being iron and incidental impurities.Type: GrantFiled: June 24, 1998Date of Patent: December 7, 1999Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Akitsugu Fujita, Masatomo Kamada
-
Patent number: 5972287Abstract: Disclosed is a heat-resisting steel comprising 0.05 to 0.15% by weight of carbon, 0.01 to 0.1% by weight of silicon, 0.01 to 1% by weight of manganese, 8 to 11% by weight of chromium, 0.1 to 0.8% by weight of nickel, 0.1 to 0.3% by weight of vanadium, a total of 0.01 to 0.2% by weight of niobium and tantalum, 0.001 to 0.01% by weight of nitrogen, 0.01 to 0.5% by weight of molybdenum, 0.9 to 3.5% by weight of tungsten, 0.1 to 4.5% by weight of cobalt, 0.001 to 0.01% by weight of boron, and the balance being iron and incidental impurities, as well as other similar heat-resisting steels. Thus, this invention provides heat-resisting steels which are 12Cr steel-based materials having excellent high-temperature strength and can be used at steam temperatures of 593.degree. C. or above, and forged steel products such as steam turbine rotors for high-temperature use.Type: GrantFiled: June 23, 1998Date of Patent: October 26, 1999Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Akitsugu Fujita, Fujimitsu Masuyama, Masatomo Kamada
-
Patent number: 5916517Abstract: A process for making and using machine parts which in their function are exposed to severe stress from sliding superficial friction and machine parts produced thereby are described. The parts are made from an iron-based alloy which includes the following elements, in weight %: 0.35 to 1.0, preferably 0.4 to 0.8% C; up to 1.0% Si; up to 1.6%, preferably 0.3 to 1.4% Mn; 0.10 to 0.35, preferably 0.12 to 0.29% N; up to 1.0, preferably up to 0.8% Al; up to 2.8% Co; 14.0 to 25.0, preferably 16.0 to 19.0% Cr; 0.5 to 3.0, preferably 0.8 to 1.5% Mo; up to 3.0, preferably up to 1.5% Ni; 0.04 to 0.4, preferably 0.05 to 0.2% V; up to 3.0% W; up to 0.18% Nb; and up to 0.20% Ti. The total concentration of carbon and nitrogen results in a value of at least 0.5% and at most 1.2%, preferably at least 0.61% and at most 0.95%, with the remainder being iron and metallurgically required admixtures for the production of machine parts.Type: GrantFiled: November 6, 1995Date of Patent: June 29, 1999Assignee: Bohler Edelstahl GmbHInventors: Gerhard Hackl, Gunter Hochortler
-
Patent number: 5817192Abstract: This invention relates to a high-strength and high-toughness heat-resisting steel formed from a heat-resisting steel containing, on a weight percentage basis, 0.08 to 0.25% carbon, up to 0.10% silicon, up to 0.10% manganese, 0.05 to 1.0% nickel, 10.0 to 12.5% chromium, 0.6 to 1.9% molybdenum, 1.0 to 1.95% tungsten, 0.10 to 0.35% vanadium, 0.02 to 0.10% niobium, 0.01 to 0.08% nitrogen, 0.001 to 0.01% boron, and 2.0 to 8.0% cobalt, the balance being substantially iron, and having a structure consisting of a tempered martensite matrix.Type: GrantFiled: November 21, 1996Date of Patent: October 6, 1998Assignee: Mitsubishi Jukogyo Kabushiki KaishaInventors: Hisataka Kawai, Toshio Sakon, Yoshikuni Kadoya, Ichirou Tsuji, Ryotarou Magoshi
-
Patent number: RE36382Abstract: Precipitation hardenable martensitic stainless steel of high strength combined with high ductility. The Iron-based steel comprises of about 10 to 14% chromium, about 7 to 11% nickel, about 0.5 to 6% molybdenum, up to 9% cobalt, about 0.5% to 4% copper, about 0.4 to 1.4% titanium, about 0.05 to 0.6% aluminium, carbon and nitrogen not exceeding 0.05% with iron as the remainder and all other elements of the periodic table not exceeding 0.5%.Type: GrantFiled: September 4, 1997Date of Patent: November 9, 1999Assignee: Sandvik ABInventor: Anna Hultin-Stigenberg