公开(公告)号：US4844024A

公开(公告)日：1989-07-04

申请号：US213868

申请日：1988-06-30

申请人： Akira Fujiki ,  Yoshiteru Yasuda ,  Ichiro Tanimoto ,  Hiroyuki Endo ,  Yutaka Ikenoue ,  Keitaro Suzuki

发明人： Akira Fujiki ,  Yoshiteru Yasuda ,  Ichiro Tanimoto ,  Hiroyuki Endo ,  Yutaka Ikenoue ,  Keitaro Suzuki

IPC分类号： C22C38/00 ,  C22C33/02 ,  C22C38/32 ,  F01L3/02 ,  F01L3/22

CPC分类号： C22C33/0278 ,  C22C33/0292 ,  F01L3/02 ,  F01L3/22

摘要： A heat resistant and wear resistant iron-base sintered alloy to be used as the material of a valve seat and a valve face of an engine valve and a waste gate valve of a turbocharger for an internal combustion engine. The iron-base sintered alloy consists essentially of at least one of molybdenum and tungsten, ranging from 3 to 25% by weight, chromium ranging from 1 to 10% by weight, silicon ranging from 0.1 to 0.9% by weight, manganese ranging not more than 0.7% by weight, phosphorus ranging not more than 0.05% by weight, carbon ranging from 0.1 to 2.5% by weight, boron ranging from 0.5 to 2.0% by weight, intermetallic compound of TiAl ranging from 0.3 to 20% by weight, and balance including iron and impurities. In the sintered alloy, carbide, boride and/or carbide boride and TiAl are uniformly dispersed in the matrix, thereby strengthening grain boundary.

摘要翻译： 用作内燃机的涡轮增压器的发动机阀的阀座和阀面的阀面和废气闸阀的耐热耐磨铁基烧结合金。 铁基烧结合金基本上由钼和钨中的至少一种组成，范围为3至25重量％，铬为1至10重量％，硅为0.1至0.9重量％，锰不超过 0.7重量％以下的磷，0.05重量％以下的碳，0.1〜2.5重量％的碳，0.5〜2.0重量％的硼，TiAl的金属间化合物的0.3〜20重量％，以及 平衡包括铁和杂质。 在烧结合金中，碳化物，硼化物和/或碳化物硼化物和TiAl均匀分散在基体中，从而加强晶界。

公开(公告)号：US4919719A

公开(公告)日：1990-04-24

申请号：US237038

申请日：1988-08-29

申请人： Makoto Abe ,  Ichiro Tanimoto ,  Akira Fujiki ,  Keitaro Suzuki ,  Hiroyuki Endo ,  Yutaka Ikenoue

发明人： Makoto Abe ,  Ichiro Tanimoto ,  Akira Fujiki ,  Keitaro Suzuki ,  Hiroyuki Endo ,  Yutaka Ikenoue

IPC分类号： C22C33/02 ,  C22C38/00 ,  C22C38/12 ,  C22C38/44 ,  F01L3/04 ,  F02B1/04

CPC分类号： F01L3/04 ,  C22C33/0285 ,  F02B1/04

摘要： A high temperature wear resistant sintered alloy suitable for the material of a valve seat in an automotive vehicle engine. The matrix of the sintered alloy consists essentially of carbon ranging from 0.45 to 1.15% by weight, nickel ranging from 5.4 to 27% by weight, molybdenum ranging form 0.4 to 2.7% by weight, cobalt ranging from 4.2 to 7.2% by weight and balance being substantially iron. The matrix is formed of a mixture of at least one of sorbite structure and bainite structure and austenite structure. Furthermore, the matrix includes hard phase dispersed therein and containing at least silicon, molybdenum and cobalt. The sintered alloy of such a structure can exhibit high strength and wear resistance at high temperatures regardless of type of engine and kind of fuel in case of being used as the material of the valve seat, while maintaining production cost thereof lower.

摘要翻译： 适用于汽车发动机的阀座材料的高温耐磨烧结合金。 烧结合金的基体主要由碳组成，其重量范围为0.45-1.15重量％，镍含量为5.4至27重量％，钼范围为0.4至2.7重量％，钴为4.2至7.2重量％，余量为 基本上是铁的。 该基质由索氏体结构和贝氏体组织中的至少一种与奥氏体组织的混合物形成。 此外，基质包括分散在其中的硬相，并且至少含有硅，钼和钴。 这种结构的烧结合金在用作阀座的材料的情况下，不管发动机和燃料种类如何，在高温下都能表现出高的强度和耐磨性，同时保持其生产成本更低。

公开(公告)号：US4778522A

公开(公告)日：1988-10-18

申请号：US23631

申请日：1987-03-09

申请人： Yoshihiro Maki ,  Makoto Kano ,  Akira Fujiki ,  Ichiro Tanimoto ,  Hiroyuki Endo ,  Yukata Ikenoue ,  Kei Ishii

发明人： Yoshihiro Maki ,  Makoto Kano ,  Akira Fujiki ,  Ichiro Tanimoto ,  Hiroyuki Endo ,  Yukata Ikenoue ,  Kei Ishii

IPC分类号： C22C38/00 ,  C22C33/02 ,  C22C38/52 ,  C22C29/06 ,  C22C29/08

CPC分类号： C22C33/0278

摘要： A wear resistant iron-base sintered alloy consists essentially of at least one selected from the group consisting of molybdenum and tungsten, ranging from 5 to 20% by weight, chromium ranging from 2 to 10% by weight, silicon ranging from 0.1 to 0.9% by weight, manganese ranging not more than 0.7% by weight, phosphorus ranging not more than 0.05% by weight, carbon ranging from 0.1 to 0.8% by weight, boron ranging from 0.5 to 2.0% by weight, and balance including iron and an impurity, so that fine multiple carbide, multiple boride, and/or multiple carbide-boride can be homogeneously dispersed as hard grains in the structure of a matrix, thereby exhibiting excellent wear resistance, scuffing resistance and pitting resistance.

摘要翻译： 耐磨铁基烧结合金主要由选自钼和钨组成的组中的至少一种组成，其范围为5-20重量％，2-10重量％的铬，0.1-0.9重量％的硅， 的锰，不超过0.7重量％，磷不超过0.05重量％，碳为0.1〜0.8重量％，硼为0.5〜2.0重量％，余量为铁和杂质 ，使得多个碳化物，多重硼化物和/或多个碳化物 - 硼化物能够在基体的结构中均匀地分散成硬质颗粒，从而表现出优异的耐磨性，耐擦伤性和耐点蚀性。

公开(公告)号：US4761344A

公开(公告)日：1988-08-02

申请号：US36485

申请日：1987-04-09

申请人： Yoshihiro Maki ,  Makoto Kano ,  Akira Fujiki ,  Ichiro Tanimoto

发明人： Yoshihiro Maki ,  Makoto Kano ,  Akira Fujiki ,  Ichiro Tanimoto

IPC分类号： B22F7/06 ,  C22C1/10 ,  C22C29/14 ,  F01L1/16 ,  F01L1/18 ,  B22F3/00

CPC分类号： B22F7/06 ,  C22C1/1084 ,  C22C29/14 ,  F01L1/16 ,  F01L1/18 ,  F01L2101/00 ,  Y10T428/12056 ,  Y10T428/12139 ,  Y10T428/12576

摘要： A rocker arm of a valve mechanism of an automotive internal combustion engine is composed of a rocker arm tip secured to a rocker arm main body. The rocker arm tip includes a sheet type sintered alloy adhered to a steel substrate. The sintered alloy includes a joining phase of martensite stainless steel, and a hard phase of boride and/or multiple boride of at least one, including iron, of elements capable of forming boride and/or multiple boride. The hard phase is homogeneously dispersed in the joining phase. The sintered alloy contains boron ranging from 3.0 to 5.0% by weight, and the hard phase ranging from 40 to 62% by weight. Additionally, the sintered alloy has a maximum grain size of the boride and/or multiple boride ranging not larger than 50 .mu.m, a Rockwell A-scale hardness number ranging not less than 80, and a deflective strength ranging not lower than 175 kgf/mm.sup.2.

摘要翻译： 汽车内燃机的阀机构的摇臂由固定在摇臂主体上的摇臂末端构成。 摇臂尖端包括粘附到钢基底上的片状烧结合金。 烧结合金包括马氏体不锈钢的接合相，和能够形成硼化物和/或多个硼化物的元素的至少一种（包括铁）的硼化物和/或多层硼化物的硬质相。 硬相在接合阶段均匀分散。 烧结合金含有3.0〜5.0重量％的硼，硬相为40〜62重量％。 此外，烧结合金的硼化物和/或多个硼化物的最大晶粒尺寸不大于50μm，洛氏A级硬度值不小于80，偏转强度不低于175kgf / mm2。

公开(公告)号：US5195473A

公开(公告)日：1993-03-23

申请号：US821908

申请日：1992-01-15

申请人： Makoto Kano ,  Ichiro Tanimoto ,  Osamu Kawamura ,  Teruo Takahashi

发明人： Makoto Kano ,  Ichiro Tanimoto ,  Osamu Kawamura ,  Teruo Takahashi

IPC分类号： C22C33/08

CPC分类号： C22C33/08

摘要： In a process of casting a rocker arm as one piece from high chrome cast iron, a Ca-Si base addition agent is added to the molten metal in an amount of 0.3 to 0.6% by weight. The agent is effective as a globulizer to round high-hardness carbide precipitates directing toward the casting surface.

摘要翻译： 在从高铬铸铁铸造摇臂作为一体的过程中，以0.3-0.6重量％的量向熔融金属中加入Ca-Si基添加剂。 该试剂作为球形化剂是有效的，以将朝向铸造表面的高硬度碳化物沉淀物圆形化。

公开(公告)号：US5096515A

公开(公告)日：1992-03-17

申请号：US442279

申请日：1989-11-28

申请人： Osamu Kawamura ,  Teruo Takahashi ,  Makoto Kano ,  Ichiro Tanimoto

发明人： Osamu Kawamura ,  Teruo Takahashi ,  Makoto Kano ,  Ichiro Tanimoto

IPC分类号： F16H53/06 ,  C22C37/06 ,  C22C37/08 ,  F01L1/18 ,  F02B1/04

CPC分类号： C22C37/08 ,  F01L1/18 ,  F02B1/04

摘要： A high strength high chromium cast iron contains fine particle precipitated hard carbide. The precipitated hard carbide has an average particle size of 20 .mu.m or less and hardness of Hv 500 or more in martensite base matrix, and has area ratio in a range of 30% or more and 45% or less. The precipitated hard carbide has spheroidal ratio (surface area of sphere circumscribing the precipitated hard carbide versus actual surface area of precipitated hard carbide) of 40% or more.