Komatsu Corporation

Yoshikiyo Tanaka

Takemori Takayama

Tetsuo Ohnishi

Kazuo Okamura

Kan'ichi Sato

Keiichi Maeda

Tetsuo Onishi

Masaharu Amano

Masayuki Ohishi

A tooth, which is a wear-resistant component, includes a core, and a body made of a first metal and disposed to enclose the core. The core includes a matrix made of a second metal, first hard particles dispersed in the matrix, and a hard structure extending from the corresponding first hard particle in a direction along the grain flow in the body, the hard structure being higher in hardness than the matrix.

Wear-resistant component and method for producing the same

A contact material which provides improved wear resistance as well as reduced adhesion utilizing the features of an intermetallic compound having an ordered phase, with the intention of (i) improving the seizure resistance and/or wear resistance of an implement bearing which slides under low-speed, high-surface-pressure conditions and is susceptible to lubricant starvation; (ii) preventing abnormal noises; and (iii) achieving prolonged greasing intervals. The contact material contains 10% by volume or more a metallic alloy phase having such a composition range that causes an order-disorder transition. The metallic alloy phase is a Fe base alloy phase containing one or more elements selected from the group consisting of Al, Si, Co and Ni.

Contact material, composite sintered contact component and method of producing same

A wear-resistant iron-based sintered contact material is provided which is sintered by powder sintering so as to have high density, high seizure resistance and wear resistance. A wear-resistant iron-based sintered composite contact component composed of the wear-resistant iron-based sintered contact material sinter-bonded to a backing metal and its producing method are also provided. To this end, at least CrC-type carbide and/or MC-type carbide which have an average particle diameter of 5 &#x3bc;m or more are precipitately dispersed in an amount of 20 to 50% by volume within an iron-based martensite parent phase which has a hardness of HRC 50 or more even when tempered at up to 600&#xb0; C.

Wear-resistant sintered contact material, wear-resistant sintered composite contact component and method of producing the same

With the objectives of alleviating the property of attacking on the mating member by scratching-off of local agglutinates on the sliding contact surface, achieving improved wear resistance, and achieving improved seizure resistance through restraint of frictional heat generation by a hard phase, a copper based sintered contact material contains shock-resistant ceramics in an amount of 0.05 to less than 0.5 wt % as non-metallic particles composed of one or more substances selected from pulverized oxides, carbides and nitrides. The shock-resistant ceramics are comprised of SiOand/or two or more substances selected from SiO, AlO, LiO, TiOand MgO.

Copper based sintered contact material and double-layered sintered contact member

Contact material, composite sintered component and method of producing same

There is provided a sintered material of which dimensional accuracy has been increased by improving the sinterability of Cu&mdash;Al based sintered material. More specifically, there are provided a sintered material and a composite sintered contact component, which are excellent in strength, wear resistance, seizure resistance and corrosion resistance. The sintered material is a Cu&mdash;Al based sintered material containing at least 1 to 12 wt % Sn and 2 to 14 wt % Al, and the composite sintered contact component is formed by sinter-bonding this sintered material to a metal backing.

Sintered material and composite sintered contact component

There are disclosed copper-base and/or iron-base contact materials which contain a Pb intermetallic compound dispersedly precipitated therein and which have highly improved sliding properties. Double layered contact elements improved in oil impregnation and lubricity are formed by sinter bonding the above contact materials to an iron-base metal backing, respectively. Economical producing methods for such double layered contact materials are also disclosed. In the copper-base and/or iron-base contact materials, one or more kinds of Pb intermetallic compounds are dispersedly precipitated.

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Hirakata, Japan

Yoshikiyo Tanaka