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公开(公告)号：US4671491A
公开(公告)日：1987-06-09
申请号：US743934
申请日：1985-06-12
CPC分类号： F01L3/22 , B22F7/06 , C22C33/0285 , F02B1/04 , F02F2001/008 , Y10S29/031 , Y10T29/49306 , Y10T428/12937
摘要： A valve-seat insert for internal combustion engines comprises a double-layered, sintered alloy composed of a valve-seat layer on which a valve is seated, and a base layer integrated with the valve-seat layer and adapted to be seated in a cylinder head of an engine. The valve-seat layer is composed of a sintered alloy of a high heat resistance and a high wear resistance having a composition comprising, by weight, 4 to 8% Co, 0.6 to 1.6% Cr, 4 to 8% Mo, 1 to 3% Ni, 0.3 to 1.5% C, 0.2 to 0.6% Ca, and the balance of Fe and inevitable impurities, the additives, Co, Cr and Mo being present mainly in a form of a Co-Cr-Mo hard alloy and a hard Fe-Mo alloy dispersed in the Fe matrix. The base layer is composed of a sintered alloy of a higher heat resistance and a higher creep resistance than those of the valve-seat layer and having a composition comprising, by weight, 11 to 15% Cr, 0.4 to 2.0% Mo, 0.05 to 0.3% C, and the balance of Fe and inevitable impurities. At least the valve-seat layer of the double-layered, sintered alloy is being fusion-infiltrated with copper.
摘要翻译： 一种用于内燃机的阀座插件，包括一个双层烧结合金，它由阀座上安装的阀座层和与阀座层一体化的基座层组成， 发动机的头。 阀座层由具有高耐热性和高耐磨性的烧结合金构成，其组成包括重量比为4〜8％的Co，0.6〜1.6％的Cr，4〜8％的Mo，1〜3 ％Ni，0.3〜1.5％C，0.2〜0.6％Ca，余量为Fe和不可避免的杂质，添加剂Co，Cr和Mo主要以Co-Cr-Mo硬质合金的形式存在，硬质 Fe-Mo合金分散在Fe基体中。 基层由具有比阀座层高的耐热性和较高的抗蠕变性的烧结合金组成，并且具有重量比为11〜15％的Cr，0.4〜2.0％的Mo，0.05〜 0.3％C，余量为Fe和不可避免的杂质。 至少双层烧结合金的阀座层被铜熔融渗透。
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公开(公告)号：US4734968A
公开(公告)日：1988-04-05
申请号：US933190
申请日：1986-11-21
CPC分类号： F01L3/22 , B22F7/06 , C22C33/0285 , F02B1/04 , F02F2001/008 , Y10S29/031 , Y10T29/49306 , Y10T428/12937
摘要： A valve-seat insert for internal combustion engines comprises a double-layered, sintered alloy composed of a valve-seat layer on which a valve is seated, and a base layer integrated with the valve-seat layer and adapted to be seated in a cylinder head of an engine. The valve-seat layer is composed of a sintered alloy of a high heat resistance and a high wear resistance having a composition comprising, by weight, 4 to 8% Co, 0.6 to 1.5% Cr, 4 to 8% Mo, 1 to 3% Ni, 0.3 to 1.5% C, 0.2 to 0.6% Ca, and the balance of Fe and inevitable impurities, the additives, Co, Cr and Mo being present mainly in a form of a Co-Cr-Mo hard alloy and a hard Fe-Mo alloy dispersed in the Fe matrix. The base layer is composed of a sintered alloy of a higher heat resistance and a higher creep resistance than those of the valve-seat layer and having a composition comprising, by weight, 11 to 15% Cr, 0.4 to 2.0% Mo, 0.05 to 0.3% C, and the balance of Fe and inevitable impurities. At least the valve-seat layer of the double-layered, sintered alloy is being fusion-infiltrated with copper.
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公开(公告)号：US4546737A
公开(公告)日：1985-10-15
申请号：US626124
申请日：1984-06-29
CPC分类号： F01L3/22 , B22F7/06 , C22C33/0285 , F02B1/04
摘要： A valve-seat insert for internal combustion engines comprises a double layered, sintered alloy composed of a valve-seat layer on which a valve is seated, and a base layer integrated with the valve-seat layer and adapted to be seated in a cylinder head of an engine. The valve-seat layer is composed of a sintered alloy of a high heat resistance and a high wear resistance having a composition comprising, by weight, 4 to 8% Co, 0.6 to 1.6% Cr, 4 to 8% Mo, 1 to 3% Ni, 0.3 to 1.5% C, 0.2 to 0.6% Ca, and the balance being substantially Fe, the additives, Co, Cr and Mo being present mainly in a form of a Co-Cr-Mo hard alloy and a hard Fe-Mo alloy dispersed in the Fe matrix. The base layer is composed of a sintered alloy of a higher heat resistance and a higher wear resistance than those of the valve-seat layer and having a composition comprising, by weight, 11 to 15% Cr, 0.4 to 2.0% Mo, 0.05 to 0.3% C, balance substantially Fe. The sintered alloy for the base layer may have a compositions further including 2 to 4% Cu.
摘要翻译： 一种用于内燃机的阀座插件包括一个双层烧结合金，其由阀座上安置的阀座层和与阀座层一体化的基座层组成，并且适于安装在气缸盖中 的发动机。 阀座层由具有高耐热性和高耐磨性的烧结合金构成，其组成包括重量比为4〜8％的Co，0.6〜1.6％的Cr，4〜8％的Mo，1〜3 ％Ni，0.3〜1.5％C，0.2〜0.6％Ca，余量实质上为Fe，添加剂Co，Cr和Mo主要以Co-Cr-Mo硬质合金和硬质Fe- Mo合金分散在Fe基体中。 基层由具有比阀座层高的耐热性和较高的耐磨性的烧结合金组成，并且具有重量比为11〜15％的Cr，0.4〜2.0％的Mo，0.05〜 0.3％C，余量基本上为Fe。 用于基层的烧结合金可以具有进一步包含2至4％Cu的组成。
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公开(公告)号：US4915735A
公开(公告)日：1990-04-10
申请号：US180819
申请日：1988-05-10
申请人： Naoki Motooka
发明人： Naoki Motooka
CPC分类号： C22C33/0228 , C22C33/0285
摘要： A wear-resistant sintered alloy comprising an Cr-C-Fe base alloy in which 0.5 to 3% by weight of CaF.sub.2 and 5 to 20% by weight of hard particles having particle size of 44 to 150 .mu.m and a mean value of Vickers hardness of 800 to 2000 are dispersed. This wear-resistant sintered alloy is produced by a method comprising the steps of adding 1.2 to 2% by weight of carbon powder, 0.5 to 3% by weight of calcium fluoride powder, and 5 to 20% by weight of hard metal powder having the particle size of 44 to 150 .mu.m and a mean value of Vickers hardness of 800 to 2000, to an Fe-Cr-C base alloy powder containing 10 to 20% by weight of Cr and 0.8 to 1.5% by weight of C, mixing them, molding the resultant mixed powder into a desired shaped, and then sintering the compact in the temperature range of from 1180.degree. to 1260.degree. C. in a non-oxidizing atmosphere. The sintered alloy is useful as a material for parts required to have the heat resistance and wear resistance.
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公开(公告)号：US5125811A
公开(公告)日：1992-06-30
申请号：US623660
申请日：1990-12-28
申请人： Nobuya Amano , Naoki Motooka
发明人： Nobuya Amano , Naoki Motooka
CPC分类号： C22C33/0278 , F01C21/0809 , F05B2280/10 , F05C2201/0448 , Y10T29/49245 , Y10T29/49336
摘要： A compressor vane of a sintered iron-base alloy composed of an iron-base matrix containing hard carbides uniformly dispersed therein, characterized in that the sintered iron-base alloy consists essentially of 0.7 to 1.5% by weight C, 3.0 to 5.0% by weight Cr, 0 to 10.0% by weight Mo, 1 to 20.0% by weight W, 0.5 to 6.0% by weight V, 0 to 15.0% by weight Co and the balance iron and inevitable impurities, and that the compressor vane is produced by molding under a pressure of 5 to 8 ton/cm.sup.2 and then sintering at a temperature of less than 1250.degree. C. so as to control particle size of the hard carbide to not more than 5 .mu.m, as well as to control the theoretical relative density to 80 to 90%, and to control the macro-hardness to 10 to 45 in the Rockwell C scale.
摘要翻译： PCT No.PCT / JP90 / 00561 Sec。 371 1990年12月28日第 102（e）1990年12月28日PCT 1990年4月27日PCT。一种烧结铁基合金的压缩机叶片，由含有均匀分散在其中的硬质碳化物的铁基基体组成，其特征在于，烧结铁基 合金基本上由0.7〜1.5重量％的C，3.0〜5.0重量％的Cr，0〜10.0重量％的Mo，1〜20.0重量％的W，0.5〜6.0重量％的V，0〜15.0重量％ Co和余量为铁和不可避免的杂质，并且压缩机叶片通过在5至8吨/ cm2的压力下成型制备，然后在低于1250℃的温度下烧结，以控制硬度的颗粒尺寸 碳化物不超过5微米，并将理论相对密度控制在80〜90％，并将洛氏C级的宏观硬度控制在10〜45。
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