Patents by Inventor Wei-Di Cao
Wei-Di Cao has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 9027374Abstract: A method of processing an alloy workpiece to reduce thermal cracking may comprise spraying a metallic coating material onto at least a portion of a surface of the alloy workpiece to form a surface coating metallurgically bonded to the alloy workpiece. The surface coating may be more ductile than the alloy workpiece and reduces heat loss from the alloy workpiece.Type: GrantFiled: March 15, 2013Date of Patent: May 12, 2015Assignee: ATI Properties, Inc.Inventors: Robin M. Forbes Jones, Richard L. Kennedy, Wei-Di Cao
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Publication number: 20140260478Abstract: A method of processing an alloy workpiece to reduce thermal cracking may comprise spraying a metallic coating material onto at least a portion of a surface of the alloy workpiece to form a surface coating metallurgically bonded to the alloy workpiece. The surface coating may be more ductile than the alloy workpiece and reduces heat loss from the alloy workpiece.Type: ApplicationFiled: March 15, 2013Publication date: September 18, 2014Applicant: ATI PROPERTIES, INC.Inventors: Robin M. Forbes Jones, Richard L. Kennedy, Wei-Di Cao
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Patent number: 8394210Abstract: A nickel-base alloy having favorable toughness and thermal fatigue resistance comprises, in weight percentages based on total alloy weight: 9 to 12 chromium; 25 to 35 iron; 1 to 3 molybdenum; 3.0 to 5.5 niobium; 0.2 to 2.0 aluminum; 0.3 to 3.0 titanium; less than 0.10 carbon; no more than 0.01 boron; nickel; and incidental impurities. Also disclosed are die casting dies, other tooling, and other articles of manufacture made from or comprising the nickel-base alloy.Type: GrantFiled: May 5, 2011Date of Patent: March 12, 2013Assignee: ATI Properties, Inc.Inventors: Wei-Di Cao, Richard L. Kennedy, Michael M. Antony, John W. Smythe
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Patent number: 8313592Abstract: A thermal mechanical treatment method includes hot working a precipitation hardening martensitic stainless steel, quenching the stainless steel, and aging the stainless steel. According to certain embodiments, the thermal mechanical treatment does not include solution heat treating the stainless steel prior to aging or cryogenically cooling the stainless steel. An article includes a precipitation hardening martensitic stainless steel having a process history that includes hot working the stainless steel, quenching the stainless steel, and aging the stainless steel. According to certain embodiments, the process history does not include solution heat treating the stainless steel prior to aging or cryogenically cooling the stainless steel.Type: GrantFiled: March 15, 2011Date of Patent: November 20, 2012Assignee: ATI Properties, Inc.Inventors: Wei-Di Cao, Erin T. McDevitt
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Publication number: 20110206553Abstract: A nickel-base alloy having favorable toughness and thermal fatigue resistance comprises, in weight percentages based on total alloy weight: 9 to 12 chromium; 25 to 35 iron; 1 to 3 molybdenum; 3.0 to 5.5 niobium; 0.2 to 2.0 aluminum; 0.3 to 3.0 titanium; less than 0.10 carbon; no more than 0.01 boron; nickel; and incidental impurities. Also disclosed are die casting dies, other tooling, and other articles of manufacture made from or comprising the nickel-base alloy.Type: ApplicationFiled: May 5, 2011Publication date: August 25, 2011Applicant: ATI Properties, Inc.Inventors: Wei-Di Cao, Richard L. Kennedy, Michael M. Antony, John W. Smythe
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Publication number: 20110186190Abstract: A thermal mechanical treatment method includes hot working a precipitation hardening martensitic stainless steel, quenching the stainless steel, and aging the stainless steel. According to certain embodiments, the thermal mechanical treatment does not include solution heat treating the stainless steel prior to aging or cryogenically cooling the stainless steel. An article includes a precipitation hardening martensitic stainless steel having a process history that includes hot working the stainless steel, quenching the stainless steel, and aging the stainless steel. According to certain embodiments, the process history does not include solution heat treating the stainless steel prior to aging or cryogenically cooling the stainless steel.Type: ApplicationFiled: March 15, 2011Publication date: August 4, 2011Applicant: ATI Properties, Inc.Inventors: Wei-Di Cao, Erin T. McDevitt
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Patent number: 7985304Abstract: A nickel-base alloy having favorable toughness and thermal fatigue resistance comprises, in weight percentages based on total alloy weight: 9 to 20 chromium; 25 to 35 iron; 1 to 3 molybdenum; 3.0 to 5.5 niobium; 0.2 to 2.0 aluminum; 0.3 to 3.0 titanium; less than 0.10 carbon; no more than 0.01 boron; nickel; and incidental impurities. Also disclosed are die casting dies, other tooling, and other articles of manufacture made from or comprising the nickel-base alloy.Type: GrantFiled: April 19, 2007Date of Patent: July 26, 2011Assignee: ATI Properties, Inc.Inventors: Wei-Di Cao, Richard L. Kennedy, Michael M. Antony, John W. Smythe
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Patent number: 7931758Abstract: A thermal mechanical treatment method includes hot working a precipitation hardening martensitic stainless steel, quenching the stainless steel, and aging the stainless steel. According to certain embodiments, the thermal mechanical treatment does not include solution heat treating the stainless steel prior to aging or cryogenically cooling the stainless steel. An article includes a precipitation hardening martensitic stainless steel having a process history that includes hot working the stainless steel, quenching the stainless steel, and aging the stainless steel. According to certain embodiments, the process history does not include solution heat treating the stainless steel prior to aging or cryogenically cooling the stainless steel.Type: GrantFiled: July 28, 2008Date of Patent: April 26, 2011Assignee: ATI Properties, Inc.Inventors: Wei-Di Cao, Erin T. McDevitt
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Patent number: 7901519Abstract: A precipitation hardenable martensitic stainless steel that includes, in percent by weight, 11.0 to 12.5 percent chromium, 1.0 to 2.5 percent molybdenum, 0.15 to 0.5 percent titanium, 0.7 to 1.5 percent aluminum, 0.5 to 2.5 percent copper, 9.0 to 11.0 percent nickel, up to 0.02 percent carbon, up to 2.0 percent tungsten, and up to 0.001 percent boron. Articles formed from the stainless steel and methods of forming the same are also disclosed.Type: GrantFiled: December 10, 2003Date of Patent: March 8, 2011Assignee: ATI Properties, Inc.Inventor: Wei-Di Cao
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Publication number: 20100018615Abstract: A thermal mechanical treatment method includes hot working a precipitation hardening martensitic stainless steel, quenching the stainless steel, and aging the stainless steel. According to certain embodiments, the thermal mechanical treatment does not include solution heat treating the stainless steel prior to aging or cryogenically cooling the stainless steel. An article includes a precipitation hardening martensitic stainless steel having a process history that includes hot working the stainless steel, quenching the stainless steel, and aging the stainless steel. According to certain embodiments, the process history does not include solution heat treating the stainless steel prior to aging or cryogenically cooling the stainless steel.Type: ApplicationFiled: July 28, 2008Publication date: January 28, 2010Applicant: ATI Properties, Inc.Inventors: Wei-Di Cao, Erin T. McDevitt
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Patent number: 7531054Abstract: Embodiments of the present disclosure relate to nickel-base alloys and methods of direct aging nickel-base alloys. More specifically, certain embodiments of the present disclosure relate to methods of direct aging 718Plus® nickel-base alloy to impart improved mechanical properties, such as, but not limited to, tensile strength, yield strength, low cycle fatigue, fatigue crack growth, and creep and rupture life to the alloys. Other embodiments of the present disclosure relate to direct aged 718Plus® nickel-base alloy, and articles of manufacture made therefrom, having improved mechanical properties, such as, but not limited to, tensile strength, yield strength, low cycle fatigue, fatigue crack growth, and creep and rupture life.Type: GrantFiled: September 6, 2005Date of Patent: May 12, 2009Assignee: ATI Properties, Inc.Inventors: Richard L. Kennedy, Wei-Di Cao
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Patent number: 7527702Abstract: Embodiments of the present invention relate to nickel-base alloys, and in particular 718-type nickel-base alloys, having a desired microstructure that is predominantly strengthened by ??-phase precipitates and comprises an amount of at least one grain boundary precipitate. Other embodiments of the present invention relate to methods of heat treating nickel-base alloys, and in particular 718-type nickel-base alloys, to develop a desired microstructure that can impart thermally stable mechanical properties. Articles of manufacture using the nickel-base alloys and methods of heat treating nickel-base alloys according to embodiments of the present invention are also disclosed.Type: GrantFiled: October 6, 2006Date of Patent: May 5, 2009Assignee: ATI Properties, Inc.Inventors: Wei-Di Cao, Richard L. Kennedy
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Patent number: 7491275Abstract: Embodiments of the present invention relate to nickel-base alloys, and in particular 718-type nickel-base alloys, having a desired microstructure that is predominantly strengthened by ??-phase precipitates and comprises an amount of at least one grain boundary precipitate. Other embodiments of the present invention relate to methods of heat treating nickel-base alloys, and in particular 718-type nickel-base alloys, to develop a desired microstructure that can impart thermally stable mechanical properties. Articles of manufacture using the nickel-base alloys and methods of heat treating nickel-base alloys according to embodiments of the present invention are also disclosed.Type: GrantFiled: October 6, 2006Date of Patent: February 17, 2009Assignee: ATI Properties, Inc.Inventors: Wei-Di Cao, Richard L. Kennedy
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Publication number: 20080257457Abstract: A nickel-base alloy having favorable toughness and thermal fatigue resistance comprises, in weight percentages based on total alloy weight: 9 to 20 chromium; 25 to 35 iron; 1 to 3 molybdenum; 3.0 to 5.5 niobium; 0.2 to 2.0 aluminum; 0.3 to 3.0 titanium; less than 0.10 carbon; no more than 0.01 boron; nickel; and incidental impurities. Also disclosed are die casting dies, other tooling, and other articles of manufacture made from or comprising the nickel-base alloy.Type: ApplicationFiled: April 19, 2007Publication date: October 23, 2008Applicant: ATI Properties, Inc.Inventors: Wei-Di Cao, Richard L. Kennedy, Michael M. Antony, John W. Smythe
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Patent number: 7387692Abstract: Alloy tool steels of the present invention may be suitable for metalworking tools, bearings, gears, and specialized automotive parts, such as camshafts and lifters. A steel alloy, comprising: by weight, 0.5 to 1% carbon; 0.5 to 2.0% vanadium; 1.0 to 2.0% aluminum; 0.2 to 1.0% silicon; chromium; molybdenum; manganese; and iron. Further embodiments of the alloy tool steel consisting essentially of: by weight, 0.5 to 1% carbon; 0.5 to 1.5% vanadium; 1.0 to 2.0% aluminum; 0.2 to 1.0% silicon; 3.5 to 4.5% chromium; 0.1 to 0.5% manganese; 3.5 to 4.5% molybdenum; less than 0.05% nitrogen and the balance iron. In certain embodiments, the alloy tool steel comprises a ratio of the weight percentage of aluminum to the weight percentage of silicon in the range of 1.7 to 2.2.Type: GrantFiled: January 9, 2006Date of Patent: June 17, 2008Assignee: ATI Properties, Inc.Inventor: Wei-Di Cao
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Publication number: 20070160490Abstract: Alloy tool steels of the present invention may be suitable for metalworking tools, bearings, gears, and specialized automotive parts, such as camshafts and lifters. A steel alloy, comprising: by weight, 0.5 to 1% carbon; 0.5 to 2.0% vanadium; 1.0 to 2.0% aluminum; 0.2 to 1.0% silicon; chromium; molybdenum; manganese; and iron. Further embodiments of the alloy tool steel consisting essentially of: by weight, 0.5 to 1% carbon; 0.5 to 1.5% vanadium; 1.0 to 2.0% aluminum; 0.2 to 1.0% silicon; 3.5 to 4.5% chromium; 0.1 to 0.5% manganese; 3.5 to 4.5% molybdenum; less than 0.05% nitrogen and the balance iron. In certain embodiments, the alloy tool steel comprises a ratio of the weight percentage of aluminum to the weight percentage of silicon in the range of 1.7 to 2.2.Type: ApplicationFiled: January 9, 2006Publication date: July 12, 2007Inventor: Wei-Di Cao
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Publication number: 20070044875Abstract: Embodiments of the present disclosure relate to nickel-base alloys and methods of direct aging nickel-base alloys. More specifically, certain embodiments of the present disclosure relate to methods of direct aging 718Plus® nickel-base alloy to impart improved mechanical properties, such as, but not limited to, tensile strength, yield strength, low cycle fatigue, fatigue crack growth, and creep and rupture life to the alloys. Other embodiments of the present disclosure relate to direct aged 718Plus® nickel-base alloy, and articles of manufacture made therefrom, having improved mechanical properties, such as, but not limited to, tensile strength, yield strength, low cycle fatigue, fatigue crack growth, and creep and rupture life.Type: ApplicationFiled: September 6, 2005Publication date: March 1, 2007Inventors: Richard Kennedy, Wei-Di Cao
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Publication number: 20070029014Abstract: Embodiments of the present invention relate to nickel-base alloys, and in particular 718-type nickel-base alloys, having a desired microstructure that is predominantly strengthened by ??-phase precipitates and comprises an amount of at least one grain boundary precipitate. Other embodiments of the present invention relate to methods of heat treating nickel-base alloys, and in particular 718-type nickel-base alloys, to develop a desired microstructure that can impart thermally stable mechanical properties. Articles of manufacture using the nickel-base alloys and methods of heat treating nickel-base alloys according to embodiments of the present invention are also disclosed.Type: ApplicationFiled: October 6, 2006Publication date: February 8, 2007Applicant: ATI Properties, Inc.Inventors: Wei-Di Cao, Richard Kennedy
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Publication number: 20070029017Abstract: Embodiments of the present invention relate to nickel-base alloys, and in particular 718-type nickel-base alloys, having a desired microstructure that is predominantly strengthened by ??-phase precipitates and comprises an amount of at least one grain boundary precipitate. Other embodiments of the present invention relate to methods of heat treating nickel-base alloys, and in particular 718-type nickel-base alloys, to develop a desired microstructure that can impart thermally stable mechanical properties. Articles of manufacture using the nickel-base alloys and methods of heat treating nickel-base alloys according to embodiments of the present invention are also disclosed.Type: ApplicationFiled: October 6, 2006Publication date: February 8, 2007Applicant: ATI Properties, IncInventors: Wei-Di Cao, Richard Kennedy
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Patent number: 7156932Abstract: Embodiments of the present invention relate to nickel-base alloys, and in particular 718-type nickel-base alloys, having a desired microstructure that is predominantly strengthened by ??-phase precipitates and comprises an amount of at least one grain boundary precipitate. Other embodiments of the present invention relate to methods of heat treating nickel-base alloys, and in particular 718-type nickel-base alloys, to develop a desired microstructure that can impart thermally stable mechanical properties. Articles of manufacture using the nickel-base alloys and methods of heat treating nickel-base alloys according to embodiments of the present invention are also disclosed.Type: GrantFiled: October 6, 2003Date of Patent: January 2, 2007Assignee: ATI Properties, Inc.Inventors: Wei-Di Cao, Richard L. Kennedy