Manganese Containing Patents (Class 420/410)
-
Patent number: 9962210Abstract: A bone screw formed primarily of a magnesium alloy has a self-tapping thread, and is prestressed with a retained torsional stress oriented oppositely to the direction in which the screw is screwed into bone. The pre-stressing opposes the torsional stresses arising from screwing in the screw, thereby raising the effective strength of the screw and/or allowing for a reduction in its size/mass.Type: GrantFiled: March 3, 2016Date of Patent: May 8, 2018Assignee: BIOTRONIK AGInventors: Ullrich Bayer, Okechukwu Anopuo, Daniel Lootz
-
Publication number: 20150140352Abstract: A semifinished product for an implant and implants produced from the semifinished product, the semifinished product comprising or consisting of a region of a magnesium alloy, which is characterized by a grain size gradient of the magnesium alloy between two opposed surfaces from ?3 ?m to ?8 ?m, in each case in relation to the average grain size. Use of the semifinished product for producing corresponding implants, and also a method for producing semifinished products.Type: ApplicationFiled: October 28, 2014Publication date: May 21, 2015Inventors: Ullrich Bayer, Okechukwu Anopuo, Bernd Block
-
Publication number: 20150000800Abstract: The invention belongs to magnesium alloy design field, and relates to a low-cost high-plasticity wrought magnesium alloy. The magnesium alloy is made from the raw materials with components as follows: between 0.10% and 1.00% by mass of tin, between 0.10% and 3.00% by mass of aluminum, between 0.10% and 1.00% by mass of manganese, and commercially pure magnesium and inevitable impurities in balance. The magnesium alloy is prepared by the steps of: melting magnesium and aluminum, adding tin and then adding microalloyed element manganese, stirring, refining, casting to form ingots followed by homogenized heat treatment, and extruding to obtain a corresponding profile; or directly extruding to obtain a corresponding profile without homogenization. The invention is characterized by controlling the content of the high-cost raw material tin through using the raw material aluminum that is low in cost and low in melting point to obtain a low-cost high-plasticity wrought magnesium alloy.Type: ApplicationFiled: May 23, 2014Publication date: January 1, 2015Applicant: Chongqing UniversityInventors: Fusheng PAN, Jia SHE, Aitao TANG, Jian PENG, Xianhua CHEN
-
Publication number: 20140271333Abstract: Disclosed are a magnesium mother alloy, a manufacturing method thereof, a metal alloy using the same, and a method of manufacturing the metal alloy. In particular, there are provided a magnesium mother alloy with improved oxidation and ignition properties, and a manufacturing method thereof, and also provided a metal alloy with low cost that is suitable for design purposes using the magnesium mother alloy, and a method of manufacturing the metal alloy. The magnesium mother alloy includes a plurality of magnesium grains, and scandium dissolved in the magnesium grains, or a scandium compound crystallized at grain boundaries which are not inside but outside the magnesium grains. Also, the metal alloy suitable for design purposes is manufactured at low cost by adding the magnesium mother alloy containing scandium into a magnesium alloy or an aluminum alloy.Type: ApplicationFiled: May 27, 2014Publication date: September 18, 2014Applicant: Korea Institute of Industrial TechnologyInventors: Shea Kwang Kim, Jung Ho Seo, In Kyum Kim
-
Patent number: 8808423Abstract: Provided is a manufacturing method of a magnesium-based alloy for high temperature. The manufacturing method includes melting a magnesium (Mg) or magnesium alloy into a liquid phase, adding calcium oxide (CaO) 1.4 times the weight of a final calcium (Ca) target composition onto a surface of a melt in which the magnesium or the magnesium alloy is melted, forming a targeted amount of Ca in the magnesium or magnesium alloy through a reduction reaction between the melt and the added CaO. Specifically, the amount of Ca formed is in the range of 0.8 wt % to 2.4 wt %, and a final composition of the Mg alloy includes 6.0-8.0 wt % of aluminum (Al), 0.1-0.3 wt % of manganese (Mn), 0.2-0.3 wt % of strontium (Sr), less than 0.04 wt of zinc (Zn), less than 0.9 wt of tin (Sn), and a balance being Mg.Type: GrantFiled: March 18, 2011Date of Patent: August 19, 2014Assignee: Korea Institute of Industrial TechnologyInventors: Shae K. Kim, Jung-Ho Seo
-
Patent number: 8657973Abstract: Magnesium-based alloy wire excelling in strength and toughness, its method of manufacture, and springs in which the magnesium-based alloy wire is utilized are made available. The magnesium-based alloy wire contains, in mass %, 0.1 to 12.0% Al, and 0.1 to 1.0% Mn, and is provided with the following constitution. Diameter d that is 0.1 mm or more and 10.0 mm or less; length L that is 1000d or more; tensile strength that is 250 MPa or more; necking-down rate that is 15% or more; and elongation that is 6% or more. Such wire is produced by draw-forming it at a working temperature of 50° C. or more, and by heating it to a temperature of 100° C. or more and 300° C. or less after the drawing process has been performed.Type: GrantFiled: October 2, 2012Date of Patent: February 25, 2014Assignees: Sumitomo Electric Industries, Ltd., Sumitomo (SEI) Steel Wire Corp.Inventors: Yukihiro Oishi, Nozomu Kawabe
-
Publication number: 20140050608Abstract: A method for reducing impurities in magnesium comprises: combining a zirconium-containing material with a molten low-impurity magnesium including no more than 1.0 weight percent of total impurities in a vessel to provide a mixture; holding the mixture in a molten state for a period of time sufficient to allow at least a portion of the zirconium-containing material to react with at least a portion of the impurities and form intermetallic compounds; and separating at least a portion of the molten magnesium in the mixture from at least a portion of the intermetallic compounds to provide a purified magnesium including greater than 1000 ppm zirconium. A purified magnesium including at least 1000 ppm zirconium and methods for producing zirconium metal using magnesium reductant also are disclosed.Type: ApplicationFiled: August 14, 2012Publication date: February 20, 2014Applicant: ATI PROPERTIES, INC.Inventors: Scott Coffin, Arnel M. Fajardo
-
Publication number: 20130213528Abstract: A magnesium alloy member capable of achieving a mechanical strength and a high-temperature fatigue strength sufficient for a compressor for in automotive air conditioners The magnesium alloy member is formed by subjecting a cast material of a magnesium alloy containing, on the basis of mass %, from 0.3% to 10% calcium (Ca), from 0.2% to 15% aluminum (Al), and from 0.05% to 1.5% manganese (Mn), and containing calcium (Ca) and aluminum (Al) at a calcium/aluminum mass ratio of from 0.6 to 1.7, with the balance being magnesium (Mg) and inevitable impurities to plastic working (extrusion processing) at from 250° C. to 500° C. This makes it possible to obtain a magnesium alloy member having a room-temperature 0.2% proof stress of 300 MPa or more and a 150° C. fatigue strength of 100 MPa or greater.Type: ApplicationFiled: October 28, 2011Publication date: August 22, 2013Inventors: Sueji Hirawatari, Hidenori Hosoi, Tsuyoshi Fukui, Makoto Fukushima, Shigeharu Kamado, Tomoyuki Honma
-
Patent number: 8475608Abstract: Magnesium-based hydrogen storage alloys having metallic magnesium (Mg) and a magnesium-containing intermetallic compound (MgxMy wherein y is 1?x) and containing not less than 60 mass-% of magnesium in total, and having a phase of a primarily crystallized magnesium-containing intermetallic compound in its solidification structure.Type: GrantFiled: November 25, 2005Date of Patent: July 2, 2013Assignee: Japan Metals and Chemicals Co., Ltd.Inventors: Masahito Osawa, Hidenori Tomioka, Naoyoshi Terashita, Noboru Hayami, Shigeru Tsunokake
-
Patent number: 8308878Abstract: Magnesium-based alloy wire excelling in strength and toughness, its method of manufacture, and springs in which the magnesium-based alloy wire is utilized are made available. The magnesium-based alloy wire contains, in mass %, 0.1 to 12.0% Al, and 0.1 to 1.0% Mn, and is provided with the following constitution. Diameter d that is 0.1 mm or more and 10.0 mm or less; length L that is 1000 d or more; tensile strength that is 250 MPa or more; necking-down rate that is 15% or more; and elongation that is 6% or more. Such wire is produced by draw-forming it at a working temperature of 50° C. or more, and by heating it to a temperature of 100° C. or more and 300° C. or less after the drawing process has been performed.Type: GrantFiled: May 16, 2002Date of Patent: November 13, 2012Assignees: Sumitomo Electric Industries, Ltd., Sumitomo (SEI) Steel Wire Corp.Inventors: Yukihiro Oishi, Nozomu Kawabe
-
Publication number: 20120107171Abstract: A magnesium alloy sheet having good press formability, a magnesium alloy structural member produced by pressing the sheet, and a method for producing a magnesium alloy sheet are provided. The magnesium alloy sheet is composed of a magnesium alloy containing Al and Mn. When a region from a surface of the alloy sheet to 30% of the thickness of the alloy sheet in a thickness direction of the magnesium alloy sheet is defined as a surface region and when a 200 ?m2 sub-region is arbitrarily selected from this surface region, the number precipitated impurity grains containing both Al and Mg and having a maximum diameter of 0.5 to 5 ?m is 5 or less. When a 50 ?m2 subregion is arbitrarily selected from the surface region, the number of crystallized impurity grains containing both Al and Mn and having a maximum diameter of 0.1 to 1 ?m is 15 or less. In the grains of the crystallized phases, the mass ratio Al/Mn of Al to Mn is 2 to 5.Type: ApplicationFiled: June 8, 2010Publication date: May 3, 2012Applicant: Sumitomo Electric Industries, Ltd.Inventors: Takahiho Kitamura, Yukihiro Oishi, Nozomu Kawabe
-
Publication number: 20110236251Abstract: Provided is a manufacturing method of a magnesium-based alloy for high temperature. The manufacturing method includes melting a magnesium (Mg) or magnesium alloy into a liquid phase, adding calcium oxide (CaO) 1.4 times the weight of a final calcium (Ca) target composition onto a surface of a melt in which the magnesium or the magnesium alloy is melted, forming a targeted amount of Ca in the magnesium or magnesium alloy through a reduction reaction between the melt and the added CaO. Specifically, the amount of Ca formed is in the range of 0.8 wt % to 2.4 wt %, and a final composition of the Mg alloy includes 6.0-8.0 wt % of aluminum (Al), 0.1-0.3 wt % of manganese (Mn), 0.2-0.3 wt % of strontium (Sr), less than 0.04 wt of zinc (Zn), less than 0.9 wt of tin (Sn), and a balance being Mg.Type: ApplicationFiled: March 18, 2011Publication date: September 29, 2011Applicant: KOREA INSTITUTE OF INDUSTRIAL TECHNOLOGYInventors: Shae K. KIM, Jung-Ho SEO
-
Publication number: 20110220251Abstract: A magnesium alloy according to the present invention comprises: Al in an amount of from 2 to 6%; Ca in an amount making a compositional ratio (i.e., Ca/Al) being from 0.5 to 1.5; Mn in an amount of from 0.1 to 0.7%; strontium (Sr) in an amount of from 1 to 6%; and the balance being magnesium (Mg), and inevitable impurities and/or a modifying element; when the entirety is taken as 100% by mass. By means of this setting, Mg alloys, which are also good in terms of high-temperature characteristics, such as creep resistance and heat conductivity, in addition to ordinary-temperature characteristics, are obtained.Type: ApplicationFiled: November 6, 2009Publication date: September 15, 2011Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKIInventors: Yuki Okamoto, Kyoichi Kinoshita, Motoharu Tanizawa, Hiroya Akatsuka
-
Publication number: 20110176955Abstract: A heat-resistant magnesium alloy according to the present invention has Mg as the major component, includes Al, Ca and Mg, and has a metallic structure that comprises Mg crystalline grains and grain-boundary crystallized substances being crystallized out in a grain boundary between the Mg crystalline particles. The grain-boundary crystallized substances comprise a mixed crystal phase of a Laves-phase compound with a type-“C14” crystalline structure, and another Laves-phase compound with a type-“C36” crystalline structure. Moreover, a relative angle between a normal vector to the hexagonal-system basal plane of the Mg crystalline grains and another normal vector to the hexagonal-system basal plane of the grain-boundary crystallized substances is from 88 deg. to 92 deg. at an interface between the Mg crystalline grains and the grain-boundary crystallized substances at least.Type: ApplicationFiled: September 29, 2009Publication date: July 21, 2011Applicant: Kabushiki Kaisha Toyota JidoshokkiInventors: Tsukasa Sugie, Yoshihiro Nakagaki, Masanori Inuida, Kyoichi Kinoshita, Motoharu Tanizawa
-
Publication number: 20100273023Abstract: A method of forming a coated article is disclosed. The method involves heating a magnesium alloy component, positioning the component in a mold such that a gap exists between component outer surfaces and mold inner surfaces, and heating a magnesium-containing alloy material above its melting temperature, which is lower than that of the component. The material is formed from magnesium alloyed with i) the component element, but at a higher concentration, ii) at least one element that is different than the component element, or iii) the component element and at least one other element. The method further includes introducing the material into the gap, thereby covering at least the outer surfaces of the component, and cooling the material to form a substantially evenly distributed solidified coating on the outer surfaces of the component. The coating has a higher wear and/or corrosion resistance than that of the magnesium alloy component.Type: ApplicationFiled: April 28, 2009Publication date: October 28, 2010Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.Inventors: Guangling Song, Bob R. Powell, JR.
-
Publication number: 20100254849Abstract: An object of the invention is to provide a magnesium alloy having high strength and sufficient formability. A magnesium alloy mainly contains magnesium and has high tensile strength and high compression strength. The crystal grain structure of the alloy has a high angle grain boundary, and the inside of the crystal grain surrounded by the high angle grain boundary is composed of subgrains.Type: ApplicationFiled: October 2, 2008Publication date: October 7, 2010Inventors: Toshiji Mukai, Hidetoshi Somekawa, Tadanobu Inoue, Alok Singh
-
Publication number: 20100054985Abstract: The present invention relates to a magnesium aluminum alloy with enhanced creep resistance. The alloy contains barium and calcium in low proportions, and possesses a higher creep resistance in comparison to alloys containing rare earth elements. The alloy may additionally include zinc, tin, lithium, manganese, yttrium, neodymium, cerium and/or praseodymium in proportions of up to 7% by weight, respectively.Type: ApplicationFiled: August 13, 2009Publication date: March 4, 2010Applicant: Gkss-Forschungszentrum Geesthacht GmbHInventors: HAJO DIERINGA, Norbert Hort, Karl U. Kainer
-
Patent number: 7547411Abstract: Magnesium-based alloys are provided which exhibit improved resistance to creeping and to corrosion, as well as improved strength, and good castability. The alloys are suitable for applications at both ambient and elevated temperatures.Type: GrantFiled: May 23, 2007Date of Patent: June 16, 2009Assignees: Dead Sea manesium Ltd., Volkswagen AGInventors: Boris Bronfin, Nir Moscovitch, Mark Katzir, Soenke Schumann, Rudolph Boehm
-
Publication number: 20080311423Abstract: The invention is to provide a magnesium alloy material such as a magnesium alloy cast material or a magnesium alloy rolled material, excellent in mechanical characteristics and surface precision, a producing method capable of stably producing such material, a magnesium alloy formed article utilizing the rolled material, and a producing method therefor. The invention provides a producing method for a magnesium alloy material, including a melting step of melting a magnesium alloy in a melting furnace to obtain a molten metal, a transfer step of transferring the molten metal from the melting furnace to a molten metal reservoir, and a casting step of supplying a movable mold with the molten metal from the molten metal reservoir, through a pouring gate, and solidifying the molten metal to continuously produce a cast material. In a process from the melting step to the casting step, parts contacted by the molten metal are formed by a low-oxygen material having an oxygen content of 20 mass % or less.Type: ApplicationFiled: June 28, 2005Publication date: December 18, 2008Inventors: Masatada Numano, Yoshihiro Nakai, Toshiya Ikeda, Taichiro Nishikawa
-
Publication number: 20080304997Abstract: Disclosed is a wrought magnesium alloy having excellent strength and extrusion or rolling formability, and a method of producing the same. The wrought magnesium alloy comprises 0.1-1.5 at % group IIIa, 1.0-4.0 at % group IIIb, 0.35 at % or less of one selected from the group consisting of groups IIa, IVa, VIIa, IVb, and a mixture thereof, 1.0 at % or less of group IIb, and a balance of Mg and unavoidable impurities and thus has a second phase composite microstructure. The wrought magnesium alloy of the present invention has high strength, toughness, and formability in addition to the electromagnetic wave shield ability of magnesium. Accordingly, the wrought magnesium alloy is a material useful to portable electronic goods, such as notebook personal computers, mobile phones, digital cameras, camcorders, CD players, PDA, or MP3 players, automotive parts, such as engine room hoods, oil pans, or inner panel of door, or structural parts for airplane.Type: ApplicationFiled: March 11, 2005Publication date: December 11, 2008Applicant: PRIMOMETAL CO., LTD.Inventor: Kang-Hyung Kim
-
Patent number: 7445751Abstract: A die castable magnesium based alloy comprising, by weight, between about 3 and 10% aluminum, between about 0.5 and 2.5% calcium, up to about 1.5% silicon, up to about 0.7% zinc, and the remainder being magnesium. The alloy has been found to exhibit more favorable castability and creep resistance than comparative magnesium based alloys.Type: GrantFiled: January 13, 2006Date of Patent: November 4, 2008Assignee: Chrysler LLCInventor: Randy S. Beals
-
Publication number: 20080187454Abstract: A heat-resistant magnesium alloy is for casting, and includes Ca in an amount of from 1 to 15% by mass, Al in a summed amount of from 4 to 25% by mass with the amount of Ca, and the balance being Mg and inevitable impurities when the entirety is taken as 100% by mass. The heat-resistant magnesium alloy is not only inexpensive, but also effects an advantage that cracks are inhibited from occurring when being cast. For example, a process for producing heat-resistant magnesium alloy cast product includes the step of pressure pouring an alloy molten metal, which has a target composition around Mg-3% Ca-3% Al-from 0.2 to 0.3% Mn, into a cavity of metallic die, which is preheated to a die temperature of from 130 to 140° C. in advance. The process makes it possible to produce die-cast products, which are free from cast cracks.Type: ApplicationFiled: October 18, 2007Publication date: August 7, 2008Inventors: Motoharu Tanizawa, Kyoichi Kinoshita, Eiji Kishi, Katsufumi Tanaka, Yuki Okamoto, Takayuki Kato
-
Patent number: 7259124Abstract: The present invention discloses a hydrogen storage medium including a composite of an alloy and a catalyst/expandable graphite. The expandable graphite can be replaced by activated carbon. The catalyst content is 1-50% based on the weight of the medium, which can be Pd, Pt, Cu, Co or Ni. The alloy can be a Mg-based alloy, Ti-based alloy, La-based alloy, Mn-based alloy or Fe-based alloy. The present invention also discloses a process for preparing a hydrogen storage composite.Type: GrantFiled: February 7, 2005Date of Patent: August 21, 2007Assignee: Industrial Technology Research InstitiuteInventors: Pei-Shan Yen, Ching-Sung Hsiao, Kong-Wei Cheng, Jau-Chyn Huang
-
Patent number: 7041179Abstract: A magnesium based alloy containing at least 85.4 wt % Mg, 4.7 to 7.3 wt % aluminum, 0.17 to 0.60 wt % manganese, 0.0 to 0.8 wt % zinc, 1.8 to 3.2 wt % calcium, 0.3 to 2.2 wt % tin, and 0.0 to 0.5 wt % strontium. The alloy may comprising up to 0.004 wt % iron, up to 0.001 wt % nickel, up to 0.003 wt % copper, or up to 0.03 wt % silicon. In addition, the alloy may comprise up to 0.001 wt % beryllium.Type: GrantFiled: January 3, 2002Date of Patent: May 9, 2006Assignees: Dead Sea Magnesium Ltd., Volkswagen AGInventors: Boris Bronfin, Eliyahu Aghion, Frank Von Buch, Soenke Schumann, Mark Katzir
-
Patent number: 7029626Abstract: A die castable magnesium based alloy comprising, by weight, between about 3 and 10% aluminum, between about 0.5 and 2.5% calcium, up to about 1.5% silicon, up to about 0.7% zinc, and the remainder being magnesium. The alloy has been found to exhibit more favorable castability and creep resistance than comparative magnesium based alloys.Type: GrantFiled: January 26, 2004Date of Patent: April 18, 2006Assignee: DaimlerChrysler CorporationInventor: Randy S. Beals
-
Patent number: 6846451Abstract: There is provided a magnesium alloy containing mass percent Al: 5% to 7%, Ca: 2% to 4%, Mn: 0.1% to 0.8%, Sr: 0.001% to 0.05% and rare earth elements: 0.1% to 0.6%. If necessary, an allowable content is set in each of Si, Zn, Cu, Ni, Fe and Cl of the unavoidable impurities, with Si not higher than mass percent 0.01%, Zn not higher than mass percent 0.01%, Cu not higher than mass percent 0.008%, Ni not higher than mass percent 0.001%, Fe not higher than mass percent 0.004%, and Cl not higher than mass percent 0.003%. There is also provided a magnesium alloy member injected in the die by using such an alloy.Type: GrantFiled: April 16, 2002Date of Patent: January 25, 2005Assignee: The Japan Steel Works, Ltd.Inventors: Ryouhei Uchida, Kenzi Yamada, Makoto Matsuyama, Tadayoshi Tsukeda
-
Publication number: 20040163744Abstract: Magnesium-based alloy wire excelling in strength and toughness, its method of manufacture, and springs in which the magnesium-based alloy wire is utilized are made available. The magnesium-based alloy wire contains, in mass %, 0.1 to 12.0% Al, and 0.1 to 1.0% Mn, and is provided with the following constitution. Diameter d that is 0.1 mm or more and 10.0 mm or less; length L that is 1000 d or more; tensile strength that is 250 MPa or more; necking-down rate that is 15% or more; and elongation that is 6% or more. Such wire is produced by draw-forming it at a working temperature of 50° C. or more, and by heating it to a temperature of 100° C. or more and 300° C. or less after the drawing process has been performed.Type: ApplicationFiled: November 29, 2003Publication date: August 26, 2004Inventors: Yukihiro Oishi, Nozomu Kawabe
-
Patent number: 6719857Abstract: The present invention provides a die casting magnesium alloy having excellent heat resistance and castability, and the alloy of the present invention is a die casting magnesium alloy having excellent heat resistance and castability, comprising 2 to 6% by weight of Al, 0.3 to 2% by weight of Ca, 0.01 to 1% by weight of Sr, 0.1 to 1% by weight of Mn, the balance magnesium and unavoidable impurities. According to the present invention, more excellent effects can be obtained in the composition wherein rare earth elements are added to the composition described above.Type: GrantFiled: February 23, 2001Date of Patent: April 13, 2004Assignee: Mitsubishi Aluminum Co., Ltd.Inventors: Koichi Ohori, Yusuke Nakaura, Takeshi Sakagami
-
Patent number: 6616729Abstract: A method of grain refining cast magnesium alloy includes adding to a magnesium alloy melt containing aluminum and manganese, pure carbon powder, or a carbon source in combination with niobium pentoxide or vanadium pentoxide.Type: GrantFiled: July 30, 2002Date of Patent: September 9, 2003Assignees: Seiko Idea Center Co., Ltd.Inventors: Tetsuichi Motegi, Kiichi Miyazaki, Yoshitomo Tezuka, Kiyotaka Yoshihara, Eiji Yano
-
Patent number: 6582533Abstract: Magnesium alloys containing, by mass percent, Al: 10.0 to 13.0%, Si: 0.3 to 1.5%, Mn: 0.1 to 1.0%, and, if desired, Zn: less than 0.8%, the rest being Mg and unavoidable impurities. Neither cracking by the casting is invited nor the mechanical property is spoiled, and the fluidity can be notably improved, and it is possible to make products small in thickness and light in weight.Type: GrantFiled: February 7, 2001Date of Patent: June 24, 2003Assignee: The Japan Steel Works, Ltd.Inventors: Tadayoshi Tukeda, Akihiro Maehara, Katsuhiko Nuibe, Ryouhei Uchida
-
Publication number: 20030086811Abstract: A magnesium based alloy containing at least 86 wt % Mg; 4.8 to 9.2 wt % aluminum, 0.08 to 0.38 wt % manganese, 0.00 to 0.9 wt % zinc, 0.2 to 1.2 wt % calcium, 0.05 to 1.4 wt % strontium, and 0.00 to 0.8 wt % rare earth elements. The alloy may also comprise up to 0.02 wt % zirconium and up to 0.001 wt % beryllium.Type: ApplicationFiled: January 3, 2002Publication date: May 8, 2003Inventors: Boris Bronfin, Eliyahu Aghion, Frank Von Buch, Soenke Schumann
-
Publication number: 20030084968Abstract: A magnesium based alloy containing at least 85.4 wt % Mg, 4.7 to 7.3 wt % aluminum, 0.17 to 0.60 wt % manganese, 0.0 to 0.8 wt % zinc, 1.8 to 3.2 wt % calcium, 0.3 to 2.2 wt % tin, and 0.0 to 0.5 wt % strontium. The alloy may comprising up to 0.004 wt % iron, up to 0.001 wt % nickel, up to 0.003 wt % copper, or up to 0.03 wt % silicon. In addition, the alloy may comprise up to 0.001 wt % beryllium.Type: ApplicationFiled: January 3, 2002Publication date: May 8, 2003Inventors: Boris Bronfin, Eliyahu Aghion, Frank Von Buch, Soenke Schumann, Mark Katzir
-
Patent number: 6495267Abstract: An anodized magnesium piston including a head and skirt for an internal combustion engine. The piston includes a non-fiber-reinforced, magnesium-based alloy including up to 2.5 percent by weight rare earth metals. The piston further includes an external surface, at least a portion of which has a base layer of magnesium fluoride, magnesium oxofluoride, magnesium oxide or a mixture thereof electrochemically anodized thereto.Type: GrantFiled: October 4, 2001Date of Patent: December 17, 2002Assignee: Briggs & Stratton CorporationInventor: Jerry L. Schenkel
-
Patent number: 6395224Abstract: A magnesium alloy of the present invention includes magnesium as a main component, boron of 0.0005 weight % or more, manganese of 0.03 to 1 weight %, and substantially no zirconium or titanium. This magnesium alloy may further include aluminum of 1 to 30 weight % and/or zinc of 0.1 to 20 weight %. Because of appropriate amounts of boron and manganese contained in the magnesium alloy, the grain of the mangnesium alloy is refined.Type: GrantFiled: July 30, 1999Date of Patent: May 28, 2002Assignee: Kabushiki Kaisha Toyota Chuo KenkyushoInventors: Naohisa Nishino, Hiroshi Kawahara, Yoshihiro Shimizu
-
Patent number: 6342180Abstract: A magnesium-based casting alloy having improved elevated temperature properties and good salt-spray corrosion resistance. The inventive alloy comprises: 1 to 12% by wt. aluminum; 0.1 to 0.6% by wt. strontium; and 0.1 to 0.5% by wt. calcium, with the balance being magnesium except for impurities commonly found in magnesium alloys.Type: GrantFiled: June 5, 2000Date of Patent: January 29, 2002Assignee: Noranda, Inc.Inventors: Michel Lefebvre, Mihriban Ozden Pekguleryuz, Pierre Labelle
-
Patent number: 6322644Abstract: A magnesium-based casting alloy having good salt-spray corrosion resistance and improved creep resistance, tensile yield strength and bolt-load retention, particularly at elevated temperatures of at least 150° C., is provided. The inventive alloy comprises, in weight percent, 2 to 9% aluminum and 0.5 to 7% strontium, with the balance being magnesium except for impurities commonly found in magnesium alloys.Type: GrantFiled: December 15, 1999Date of Patent: November 27, 2001Assignee: Norands, Inc.Inventors: Mihriban Ozden Pekguleryuz, Pierre Labelle
-
Publication number: 20010026768Abstract: Magnesium alloys containing, by mass percent, Al: 10.0 to 13.0%, Si: 0.3 to 1.5%, Mn: 0.1 to 1.0%, and, if desired, Zn: less than 0.8%, the rest being Mg and unavoidable impurities. Neither cracking by the casting is invited nor the mechanical property is spoiled, and the fluidity can be notably improved, and it is possible to make products small in thickness and light in weight.Type: ApplicationFiled: February 7, 2001Publication date: October 4, 2001Inventors: Tadayoshi Tukeda, Akihiro Maehara, Katsuhiko Nuibe, Ryouhei Uchida
-
Patent number: 6264763Abstract: A family of die castable, creep-resistant magnesium alloys has been developed for high-temperature structural applications such as automotive engines and transmission cases. These alloys contain between 3% and 6% aluminum, 1.7% and 3.3% calcium, and up to 0.2% strontium. They have demonstrated 25% greater tensile and compressive creep resistance than AE42, a commercial aluminum, rare earth containing magnesium alloy, and corrosion resistance as good as AZ91D. These alloys are estimated to cost less than AZ91D and have good castability in metal molds as used in permanent mold casting and die casting.Type: GrantFiled: April 30, 1999Date of Patent: July 24, 2001Assignee: General Motors CorporationInventors: Bob Ross Powell, Vadim Rezhets, Aihua A. Luo, Basant Lal Tiwari
-
Patent number: 5811058Abstract: A heat-resistant magnesium alloy containing, based on the total weight of the alloy, 4.5-10 wt. % of aluminum, 0.1-3 wt. % of calcium, 1-3 wt. % of a rare earth element and 0.2-1 wt. % of manganese and having a composition that the contents of aluminum, calcium and the rare earth element satisfy the relationship of the following expression (1):1.66+1.33 Ca+0.37 RE.ltoreq.Al.ltoreq.2.77+1.33 Ca+0.74 REwherein Ca, RE and Al represent the weight percentages of Ca, at least one rare earth element and aluminum contained in the alloy, respectively, in the relationship.Type: GrantFiled: February 25, 1997Date of Patent: September 22, 1998Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Tsuyoshi Baba, Kensuke Honma, Masao Ichikawa
-
Patent number: 5501748Abstract: Procedure for the production of a thixotropic magnesium alloy by adding a grain refiner combined with controlled, rapid solidification with subsequent heating to the two-phase area. It is preferable to use a solidification rate of >1.degree. C./s, more preferably >10.degree. C./s. It is essential that the solidification takes place at such a speed that growth of dendrites is avoided. Heating to the two-phase area is carried out rapidly in 1-30 minutes, preferably 2-5 minutes. By heating an alloy comprising 2-8 weight % Zn, 1.5-5 weight % RE, 0.2-0.8 weight Zr balanced with magnesium to a temperature in the two-phase area after casting, the structure will assume a form in which the .alpha.-phase is globular (RE=rare earth metal). The size of the spheres will be dependent on the temperature and the holding time at that temperature and they will be surrounded by a low-smelting matrix. It is preferable that the alloy has a grain size of not greater than <100 .mu.m, more preferably 50-100 .mu.m.Type: GrantFiled: June 10, 1993Date of Patent: March 26, 1996Assignee: Norsk Hydro A.S.Inventors: Haavard Gjestland, HAkon Westengen
-
Patent number: 5244515Abstract: A method of increasing intergranular stress corrosion cracking resistance of Alloy 718 in water reactor environments is described where the alloy is heat treated at a high solution annealing temperature to dissolve grain boundary precipitates formed during thermomechanical processing. A water quenching step is advantageously employed following the high solution annealing. The alloy is then aged at two separate temperatures and finally air cooled to room temperature.Type: GrantFiled: March 3, 1992Date of Patent: September 14, 1993Assignee: The Babcock & Wilcox CompanyInventor: Marie T. Miglin
-
Patent number: 5059390Abstract: A dual-phase magnesium-based alloy consisting essentially of about 7-12% lithium, about 2-6% aluminum, about 0.1-2% rare earth metal, preferably scandium, up to about 2% zinc and up to about 1% manganese. The alloy exhibits improved combinations of strength, formability and/or corrosion resistance. There is also disclosed a composite matrix whose metal phase consists essentially of the aforementioned composition.Type: GrantFiled: June 14, 1989Date of Patent: October 22, 1991Assignee: Aluminum Company of AmericaInventors: T. David Burleigh, Rebecca K. Wyss
-
Patent number: 4938809Abstract: A complex part composed of rapidly solidified magnesium base metal alloy is produced by superplastic forming at a temperature ranging from 160.degree. C. to 275.degree. C. and at a rate ranging from 0.00021 m/sec. to 0.00001 m/sec., to improve the formability thereof and allow forming to be conducted at lower temperatures. The rapidly solidified magnesium based alloy has a composition consisting essentially of the formula Mg.sub.bal Al.sub.a Zn.sub.b X.sub.c, wherein X is at least one element selected from the group consisting of manganese, cerium, neodymium, praseodymium and yttrium, "a" range from 0 to about 15 atom percent, "b" ranges from 0 to about 4 atom percent and "c" ranges from about 0.2 to 3 atom percent, the balance being magnesium and incidental impurities, with the proviso that the sum of aluminum and zinc present ranges from about 2 to 15 atom percent. Such an alloy contains fine grain size and finely dispersed magnesium-, aluminum- rare earth intermetallic phases.Type: GrantFiled: May 23, 1988Date of Patent: July 3, 1990Assignee: Allied-Signal Inc.Inventors: Santosh K. Das, Chin-Fong Chang, Derek Raybould
-
Patent number: 4765954Abstract: A rapidly solidified magnesium based alloy contains finely dispersed magnesium intermetallic phases. The alloy has the form of a filament or a powder and is especially suited for consolidation into bulk shapes having superior combination of strength, ductility and corrosion resistance.Type: GrantFiled: September 30, 1985Date of Patent: August 23, 1988Assignee: Allied CorporationInventors: Santosh K. Das, Chin-Fong Chang
-
Patent number: 4675157Abstract: A rapidly solidified magnesium based alloy contains finely dispersed magnesium intermetallic phases. The alloy has the form of a filament or a powder and is especially suited for consolidation into bulk shapes having superior mechanical properties and corrosion resistance.Type: GrantFiled: June 7, 1984Date of Patent: June 23, 1987Assignee: Allied CorporationInventors: Santosh K. Das, Derek Raybould, Richard L. Bye, Jr., Chin-Fong Chang
-
Patent number: 4543234Abstract: Magnesium alloys containing up to 12 percent of aluminum, up to 30 percent of zinc, up to 1.5 percent of silicon, not more than 0.15 percent of manganese, and from 0.0025 percent to 0.0125 percent of dissolved beryllium are disclosed. The alloys are resistant to oxidation when they are in a molten state. A method for die casting such alloys is also disclosed.Type: GrantFiled: September 29, 1982Date of Patent: September 24, 1985Assignee: N L Industries, Inc.Inventor: George S. Foerster
-
Patent number: 4332864Abstract: A magnesium alloy contains the following additives: A1 1-9%, Zn 0-4%, Sn 0.1-5%, Mn 0-1%. It is useful as an anode in cells operating with a salt water electrolyte, especially in batteries powering equipment for deep-sea use in which a pulsed power source is required.Type: GrantFiled: September 17, 1980Date of Patent: June 1, 1982Assignee: Magnesium Elektron LimitedInventors: John F. King, Stephen L. Bradshaw