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    Thermomechanical processing of plasma sprayed intermetallic sheets
    2.
    发明授权
    Thermomechanical processing of plasma sprayed intermetallic sheets 有权
    等离子喷涂金属间板的热机械加工

    公开(公告)号：US06332936B1

    公开(公告)日：2001-12-25

    申请号：US09399364

    申请日：1999-09-20

    申请人： Mohammad R. Hajaligol ,  Clive Scorey ,  Vinod K. Sikka ,  Seetharama C. Deevi ,  Grier Fleischhauer ,  A. Clifton Lilly, Jr. ,  Randall M. German

    发明人： Mohammad R. Hajaligol ,  Clive Scorey ,  Vinod K. Sikka ,  Seetharama C. Deevi ,  Grier Fleischhauer ,  A. Clifton Lilly, Jr. ,  Randall M. German

    IPC分类号： B22F500

    CPC分类号： C22C33/0278 ,  B22F3/18 ,  B22F5/006 ,  B22F9/082 ,  B22F2003/248 ,  B22F2009/0824 ,  B22F2009/088 ,  B22F2998/10 ,  C21D8/0205 ,  C21D8/0236 ,  C21D8/0273 ,  C22C1/0491 ,  B22F3/115 ,  B22F3/16 ,  B22F3/24

    摘要： A powder metallurgical process of preparing a sheet from a powder having an intermetallic alloy composition such as an iron, nickel or titanium aluminide. The sheet can be manufactured into electrical resistance heating elements having improved room temperature ductility, electrical resistivity, cyclic fatigue resistance, high temperature oxidation resistance, low and high temperature strength, and/or resistance to high temperature sagging. The iron aluminide has an entirely ferritic microstructure which is free of austenite and can include, in weight %, 4 to 32% Al, and optional additions such as ≦1% Cr, ≧0.05% Zr ≦2% Ti, ≦2% Mo, ≦1% Ni, ≦0.75% C, ≦0.1% B, ≦1% submicron oxide particles and/or electrically insulating or electrically conductive covalent ceramic particles, ≦1% rare earth metal, and/or ≦3% Cu. The process includes forming a non-densified metal sheet by consolidating a powder having an intermetallic alloy composition such as by roll compaction, tape casting or plasma spraying, forming a cold rolled sheet by cold rolling the non-densified metal sheet so as to increase the density and reduce the thickness thereof and annealing the cold rolled sheet. The powder can be a water, polymer or gas atomized powder which is subjecting to sieving and/or blending with a binder prior to the consolidation step. After the consolidation step, the sheet can be partially sintered. The cold rolling and/or annealing steps can be repeated to achieve the desired sheet thickness and properties. The annealing can be carried out in a vacuum furnace with a vacuum or inert atmosphere. During final annealing, the cold rolled sheet recrystallizes to an average grain size of about 10 to 30 &mgr;m. Final stress relief annealing can be carried out in the B2 phase temperature range.

    摘要翻译： 从具有金属间合金组成如粉末铁，镍或钛铝化物的粉末制备片材的粉末冶金方法。 可以将片材制造成具有改善的室温延展性，电阻率，耐循环疲劳性，耐高温氧化性，低和高温强度和/或耐高温下垂的电阻加热元件。 铁铝化物具有完全不含奥氏体的铁素体组织，并且可以以重量％计含有4至32％的Al和任选的添加物，例如<= 1％Cr，> = 0.05％Zr <= 2％Ti， = 2％Mo，<= 1％Ni，≤= 0.75％C，<= 0.1％B，≤1％亚微米级氧化物颗粒和/或电绝缘或导电共价陶瓷颗粒，≤1％稀土金属， 和/或<= 3％Cu。 该方法包括通过将具有金属间化合物组合物的粉末如通过辊压，带铸或等离子体喷涂固结形成非致密金属片，通过冷轧非致密金属片形成冷轧板，以增加 密度并减小其厚度并退火冷轧板。 粉末可以是在固结步骤之前与粘合剂进行筛分和/或共混的水，聚合物或气体雾化粉末。 在固结步骤之后，片材可以部分烧结。 可以重复冷轧和/或退火步骤以实现所需的板厚度和性能。 退火可以在真空或惰性气氛的真空炉中进行。 在最终退火期间，冷轧板再结晶至平均粒径约为10〜30μm。 最终的应力消除退火可以在B2相温度范围内进行。

    Method of manufacturing aluminide sheet by thermomechanical processing of aluminide powders
    3.
    发明授权
    Method of manufacturing aluminide sheet by thermomechanical processing of aluminide powders 失效
    通过铝化物粉末的热机械加工制造铝化物片的方法

    公开(公告)号：US06660109B2

    公开(公告)日：2003-12-09

    申请号：US09984871

    申请日：2001-10-31

    申请人： Mohammad R. Hajaligol ,  Clive Scorey ,  Vinod K. Sikka ,  Seetharama C. Deevi ,  Grier Fleishhauer ,  A. Clifton Lilly, Jr. ,  Randall M. German

    发明人： Mohammad R. Hajaligol ,  Clive Scorey ,  Vinod K. Sikka ,  Seetharama C. Deevi ,  Grier Fleishhauer ,  A. Clifton Lilly, Jr. ,  Randall M. German

    IPC分类号： C21D800

    CPC分类号： C22C33/0278 ,  B22F3/18 ,  B22F5/006 ,  B22F9/082 ,  B22F2003/248 ,  B22F2009/0824 ,  B22F2009/088 ,  B22F2998/10 ,  C21D8/0205 ,  C21D8/0236 ,  C21D8/0273 ,  C22C1/0491 ,  B22F3/115 ,  B22F3/16 ,  B22F3/24

    摘要： A powder metallurgical process of preparing a sheet from a powder having an intermetallic alloy composition such as an iron, nickel or titanium aluminide. The sheet can be manufactured into electrical resistance heating elements having improved room temperature ductility, electrical resistivity, cyclic fatigue resistance, high temperature oxidation resistance, low and high temperature strength, and/or resistance to high temperature sagging. The iron aluminide has an entirely ferritic microstructure which is free of austenite and can include, in weight %, 4 to 32% Al, and optional additions such as ≦1% Cr, ≧0.05% Zr ≦2% Ti, ≦2% Mo, ≦1% Ni, ≦0.75% C, ≦0.1% B, ≦1% submicron oxide particles and/or electrically insulating or electrically conductive covalent ceramic particles, ≦1% rare earth metal, and/or ≦3% Cu. The process includes forming a non-densified metal sheet by consolidating a powder having an intermetallic alloy composition such as by roll compaction, tape casting or plasma spraying, forming a cold rolled sheet by cold rolling the non-densified metal sheet so as to increase the density and reduce the thickness thereof and annealing the cold rolled sheet. The powder can be a water, polymer or gas atomized powder which is subjecting to sieving and/or blending with a binder prior to the consolidation step. After the consolidation step, the sheet can be partially sintered. The cold rolling and/or annealing steps can be repeated to achieve the desired sheet thickness and properties. The annealing can be carried out in a vacuum furnace with a vacuum or inert atmosphere. During final annealing, the cold rolled sheet recrystallizes to an average grain size of about 10 to 30 &mgr;m. Final stress relief annealing can be carried out in the B2 phase temperature range.

    摘要翻译： 从具有金属间合金组成如粉末铁，镍或钛铝化物的粉末制备片材的粉末冶金方法。 可以将片材制造成具有改善的室温延展性，电阻率，耐循环疲劳性，耐高温氧化性，低和高温强度和/或耐高温下垂的电阻加热元件。 铁铝化物具有完全不含奥氏体的铁素体组织，并且可以以重量％计含有4至32％的Al和任选的添加物，例如<= 1％Cr，> = 0.05％Zr <= 2％Ti， = 2％Mo，<= 1％Ni，≤= 0.75％C，<= 0.1％B，≤1％亚微米级氧化物颗粒和/或电绝缘或导电共价陶瓷颗粒，≤1％稀土金属， 和/或<= 3％Cu。 该方法包括通过将具有金属间化合物组合物的粉末如通过辊压，带铸或等离子体喷涂固结形成非致密金属片，通过冷轧非致密金属片形成冷轧板，以增加 密度并减小其厚度并退火冷轧板。 粉末可以是在固结步骤之前与粘合剂进行筛分和/或共混的水，聚合物或气体雾化粉末。 在固结步骤之后，片材可以部分烧结。 可以重复冷轧和/或退火步骤以实现所需的板厚度和性能。 退火可以在真空或惰性气氛的真空炉中进行。 在最终退火期间，冷轧板再结晶至平均粒径约为10〜30μm。 最终的应力消除退火可以在B2相温度范围内进行。

    Iron aluminide useful as electrical resistance heating elements
    4.
    发明授权
    Iron aluminide useful as electrical resistance heating elements 失效
    铁铝化物可用作电阻加热元件

    公开(公告)号：US5620651A

    公开(公告)日：1997-04-15

    申请号：US426006

    申请日：1995-04-20

    申请人： Vinod K. Sikka ,  Seetharama C. Deevi ,  Grier S. Fleischhauer ,  Mohammad R. Hajaligol ,  A. Clifton Lilly, Jr.

    发明人： Vinod K. Sikka ,  Seetharama C. Deevi ,  Grier S. Fleischhauer ,  Mohammad R. Hajaligol ,  A. Clifton Lilly, Jr.

    IPC分类号： C22C38/00 ,  B22F3/23 ,  C22C1/04 ,  C22C33/02 ,  C22C38/06 ,  C22C38/14 ,  C22C38/54 ,  H01C7/00 ,  H01C13/00 ,  H05B3/12

    CPC分类号： C22C33/0278 ,  B22F3/23 ,  C22C1/0491 ,  C22C38/06 ,  B22F2998/00 ,  B22F2998/10 ,  B22F2999/00

    摘要： The invention relates generally to aluminum containing iron-base alloys useful as electrical resistance heating elements. The aluminum containing iron-base alloys have improved room temperature ductility, electrical resistivity, cyclic fatigue resistance, high temperature oxidation resistance, low and high temperature strength, and/or resistance to high temperature sagging. The alloy has an entirely ferritic microstructure which is free of austenite and includes, in weight %, over 4% Al, .ltoreq.1% Cr and either .gtoreq.0.05% Zr or ZrO.sub.2 stringers extending perpendicular to an exposed surface of the heating element or .gtoreq.0.1% oxide dispersoid particles. The alloy can contain 14-32% Al, .ltoreq.2% Ti, .ltoreq.2% Mo, .ltoreq.1% Zr, .ltoreq.1% C, .ltoreq.0.1% B, .ltoreq.30% oxide dispersoid and/or electrically insulating or electrically conductive covalent ceramic particles, .ltoreq.1% rare earth metal, .ltoreq.1% oxygen, .ltoreq.3% Cu, balance Fe.

    摘要翻译： 本发明一般涉及可用作电阻加热元件的含铝铁基合金。 含铝铁基合金具有改善的室温延展性，电阻率，循环耐疲劳性，耐高温氧化性，低，高温强度和/或耐高温下垂的能力。 该合金具有完全不含奥氏体的铁素体组织，其重量百分比包括超过4％的Al，≤1％的Cr和> / = 0.05％的Zr或ZrO2桁条，垂直于加热的暴露表面延伸 元素或> / = 0.1％氧化物分散质颗粒。 该合金可以含有14-32％的Al，2％Ti，2％Mo，1％Zr，1％C，0.1％B，30％ 氧化物分散质和/或电绝缘或导电共价陶瓷颗粒，1％稀土金属，1％氧，3％Cu，余量为Fe。

    Oxidation, carburization and/or sulfidation resistant iron aluminide alloy
    5.
    发明授权
    Oxidation, carburization and/or sulfidation resistant iron aluminide alloy 有权
    氧化，渗碳和/或耐硫化铁铝合金

    公开(公告)号：US06607576B1

    公开(公告)日：2003-08-19

    申请号：US09172375

    申请日：1998-10-14

    申请人： Vinod K. Sikka ,  Seetharama C. Deevi ,  Grier S. Fleischhauer ,  Mohammad R. Hajaligol ,  A. Clifton Lilly, Jr.

    发明人： Vinod K. Sikka ,  Seetharama C. Deevi ,  Grier S. Fleischhauer ,  Mohammad R. Hajaligol ,  A. Clifton Lilly, Jr.

    IPC分类号： C22C3302

    CPC分类号： C22C33/0278 ,  B22F3/23 ,  B22F2998/00 ,  B22F2998/10 ,  B22F2999/00 ,  C22C1/0491 ,  C22C38/06 ,  B22F3/04 ,  B22F3/20 ,  B22F3/1208 ,  B22F3/18 ,  B22F3/10 ,  B22F9/082 ,  B22F3/15 ,  B22F2201/05

    摘要： The invention relates generally to aluminum containing iron-base alloys useful as electrical resistance heating elements. The aluminum containing iron-base alloys have improved room temperature ductility, electrical resistivity, cyclic fatigue resistance, high temperature oxidation resistance, low and high temperature strength, and/or resistance to high temperature sagging. The alloy has an entirely ferritic microstructure which is free of austenite and includes, in weight %, over 4% Al, ≦1% Cr and either ≧0.05% Zr or Zro2 stringers extending perpendicular to an exposed surface of the heating element or ≧0.1% oxide dispersoid particles. The alloy can contain 14-32% Al, ≦2% Ti, ≦2% Mo, ≦1% Zr, ≦1% C, ≦0.1% B. ≦30% oxide dispersoid and/or electrically insulating or electrically conductive covalent ceramic particles, ≦1% rare earth metal, ≦1% oxygen, ≦3% Cu, balance Fe.

    摘要翻译： 本发明一般涉及可用作电阻加热元件的含铝铁基合金。 含铝铁基合金具有改善的室温延展性，电阻率，循环耐疲劳性，耐高温氧化性，低，高温强度和/或耐高温下垂的能力。 该合金具有完全不含奥氏体的铁素体组织，其重量％包括超过4％的Al，≤1％的Cr和> = 0.05％的Zr或Zro2桁条，垂直于加热元件的暴露表面延伸，或 > = 0.1％氧化物分散质颗粒。 该合金可以含有14-32％的Al，<= 2％Ti，<= 2％Mo，≤1％Zr，≤1％C，<= 0.1％B. <= 30％氧化物分散质和/或电 绝缘或导电共价陶瓷颗粒，<= 1％稀土金属，<= 1％氧，<= 3％Cu，余量为Fe。

    Iron aluminide useful as electrical resistance heating elements
    6.
    发明授权
    Iron aluminide useful as electrical resistance heating elements 有权
    具有氧化物分散体的铁铝化物片的加工

    公开(公告)号：US06280682B1

    公开(公告)日：2001-08-28

    申请号：US09399355

    申请日：1999-09-20

    申请人： Vinod K. Sikka ,  Seetharama C. Deevi ,  Grier S. Fleischhauer ,  Mohammad R. Hajaligol ,  A. Clifton Lilly, Jr.

    发明人： Vinod K. Sikka ,  Seetharama C. Deevi ,  Grier S. Fleischhauer ,  Mohammad R. Hajaligol ,  A. Clifton Lilly, Jr.

    IPC分类号： B22F102

    CPC分类号： C22C33/0278 ,  B22F3/23 ,  B22F2998/00 ,  B22F2998/10 ,  B22F2999/00 ,  C22C1/0491 ,  B22F3/04 ,  B22F9/082 ,  B22F3/1208 ,  B22F3/20 ,  B22F3/15 ,  B22F3/18 ,  B22F3/10 ,  B22F2201/05

    摘要： The invention relates generally to aluminum containing iron-base alloys useful as electrical resistance heating elements. The aluminum containing iron-base alloys have improved room temperature ductility, electrical resistivity, cyclic fatigue resistance, high temperature oxidation resistance, low and high temperature strength, and/or resistance to high temperature sagging. The alloy has an entirely ferritic microstructure which is free of austenite and includes, in weight %, over 4% Al, ≦1% Cr and either ≧0.05% Zr or ZrO2 stringers extending perpendicular to an exposed surface of the heating element or ≧0.1% oxide dispersoid particles. The alloy can contain 14-32% Al, ≦2% Ti, ≦2% Mo, ≦1% Zr, ≦1% C, ≦0.1% B, ≦30% oxide dispersoid and/or electrically insulating or electrically conductive covalent ceramic particles, ≦1% rare earth metal, ≦1% oxygen, ≦3% Cu, balance Fe.

    摘要翻译： 本发明一般涉及可用作电阻加热元件的含铝铁基合金。 含铝铁基合金具有改善的室温延展性，电阻率，循环耐疲劳性，耐高温氧化性，低，高温强度和/或耐高温下垂的能力。 该合金具有完全不含奥氏体的铁素体组织，其重量％包括超过4％的Al，≤1％的Cr和> = 0.05％的Zr或ZrO2桁条，其垂直于加热元件的暴露表面延伸，或 > = 0.1％氧化物分散质颗粒。 该合金可以含有14-32％的Al，<= 2％Ti，<= 2％Mo，≤1％Zr，≤1％C，<= 0.1％B，<= 30％氧化物分散质和/或电 绝缘或导电共价陶瓷颗粒，<= 1％稀土金属，<= 1％氧，<= 3％Cu，余量为Fe。

    Method of manufacturing iron aluminide by thermomechanical processing of elemental powers
    9.
    发明授权
    Method of manufacturing iron aluminide by thermomechanical processing of elemental powers 有权
    通过元素力的热机械加工制造铁铝化物的方法

    公开(公告)号：US06284191B1

    公开(公告)日：2001-09-04

    申请号：US09399160

    申请日：1999-09-20

    申请人： Seetharama C. Deevi ,  A. Clifton Lilly, Jr. ,  Vinod K. Sikka ,  Mohammed R. Hajaligol

    发明人： Seetharama C. Deevi ,  A. Clifton Lilly, Jr. ,  Vinod K. Sikka ,  Mohammed R. Hajaligol

    IPC分类号： C22C104

    CPC分类号： C22C33/0278 ,  B22F2998/00 ,  B22F2998/10 ,  C22C1/0491 ,  C22C38/06 ,  B22F3/23 ,  B22F3/22 ,  B22F3/18

    摘要： A powder metallurgical process of preparing iron aluminide useful as electrical resistance heating elements having improved room temperature ductility, electrical resistivity, cyclic fatigue resistance, high temperature oxidation resistance, low and high temperature strength, and/or resistance to high temperature sagging. The iron aluminide has an entirely ferritic microstructure which is free of austenite and can include, in weight %, 20 to 32% Al, and optional additions such as ≦1% Cr, ≧0.05% Zr or ZrO2 stringers extending perpendicular to an exposed surface of the heating element, ≦2% Ti, ≦2% Mo, ≦1% Zr, ≦1% C, ≦0.1% B, ≦30% oxide dispersoid and/or electrically insulating or electrically conductive covalent ceramic particles, ≦1% rare earth metal, ≦1% oxygen, and/or ≦3% Cu. The process includes forming a mixture of aluminum powder and iron powder, shaping the mixture into an article such as by cold rolling the mixture into a sheet, and sintering the article at a temperature sufficient to react the iron and aluminum powders and form iron aluminide. The sintering can be followed by hot or cold rolling to reduce porosity created during the sintering step and optional annealing steps in a vacuum or inert atmosphere.

    摘要翻译： 具有改善的室温延展性，电阻率，循环耐疲劳性，高温抗氧化性，低温和高温强度和/或耐高温下垂的电阻加热元件的制备铁铝化物的粉末冶金方法。 铁铝化物具有完全不含奥氏体的铁素体组织，并且可以以重量％计包含20至32％的Al和任选的添加物，例如<= 1％Cr，> = 0.05％Zr或ZrO2桁条，垂直于 加热元件的暴露表面<= 2％Ti，<= 2％Mo，≤1％Zr，≤1％C，<= 0.1％B，≤30％氧化物分散质和/或电绝缘或电 导电共价陶瓷颗粒，<= 1％稀土金属，<= 1％氧和/或≤3％Cu。 该方法包括形成铝粉和铁粉的混合物，将混合物成型为制品，例如通过将混合物冷轧成片材，并在足以使铁和铝粉末反应并形成铁铝化物的温度下烧结制品。 烧结之后可进行热轧或冷轧，以减少在烧结步骤中产生的孔隙率和在真空或惰性气氛中任选的退火步骤。

    Method of manufacturing iron aluminide by thermomechanical processing of elemental powders
    10.
    发明授权
    Method of manufacturing iron aluminide by thermomechanical processing of elemental powders 失效
    通过元素粉末的热机械加工制造铁铝化物的方法

    公开(公告)号：US6033623A

    公开(公告)日：2000-03-07

    申请号：US679341

    申请日：1996-07-11

    申请人： Seetharama C. Deevi ,  A. Clifton Lilly, Jr. ,  Vinod K. Sikka ,  Mohammed R. Hajaligol

    发明人： Seetharama C. Deevi ,  A. Clifton Lilly, Jr. ,  Vinod K. Sikka ,  Mohammed R. Hajaligol

    IPC分类号： B21B3/00 ,  B22F3/10 ,  B22F3/24 ,  C21D6/00 ,  C22C1/04 ,  C22C33/02 ,  C22C38/00 ,  C22C38/06 ,  C22C38/54 ,  B22F3/18

    CPC分类号： C22C33/0278 ,  C22C1/0491 ,  C22C38/06 ,  B22F2998/00 ,  B22F2998/10

    摘要： A powder metallurgical process of preparing iron aluminide useful as electrical resistance heating elements having improved room temperature ductility, electrical resistivity, cyclic fatigue resistance, high temperature oxidation resistance, low and high temperature strength, and/or resistance to high temperature sagging. The iron aluminide has an entirely ferritic microstructure which is free of austenite and can include, in weight %, 20 to 32% Al, and optional additions such as .ltoreq.1% Cr, .gtoreq.05% Zr or ZrO.sub.2 stringers extending perpendicular to an exposed surface of the heating element, .ltoreq.2% Ti, .ltoreq.2% Mo, .ltoreq.1% Zr, .ltoreq.1% C, .ltoreq.0.1% B, .ltoreq.30% oxide dispersoid and/or electrically insulating or electrically conductive covalent ceramic particles, .ltoreq.1 % rare earth metal, .ltoreq.1% oxygen, and/or .ltoreq.3% Cu. The process includes forming a mixture of aluminum powder and iron powder, shaping the mixture into an article such as by cold rolling the mixture into a sheet, and sintering the article at a temperature sufficient to react the iron and aluminum powders and form iron aluminide. The sintering can be followed by hot or cold rolling to reduce porosity created during the sintering step and optional annealing steps in a vacuum or inert atmosphere.

    摘要翻译： 具有改善的室温延展性，电阻率，耐循环疲劳性，高温抗氧化性，低温高温强度和/或耐高温下垂性的电阻加热元件的制备铁铝化物的粉末冶金方法。 铁铝化物具有完全不含奥氏体的铁素体组织，并且可以以重量％计包含20至32％的Al和任选的添加物，例如垂直延伸的 / = 05％Zr或ZrO2桁条 加热元件的暴露表面，