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AssigneeKomatsu Ltd.
InventorsTakemori Takayama, Yoshikiyo Tanaka, Tetsuo Onishi
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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.
A composite sintered contact component, wherein a sintered contact material, containing 10% by volume or more a Fe base alloy phase having a composition range which causes an order-disorder transition, is integrated with a sheet-like, cylindrical or substantially cylindrical backing made from an iron base material, wherein said Fe base alloy phase contains Fe as a chief component and at least 12 to 30 wt % Al, and wherein the porosity of said composite sintered contact component is adjusted to be 10 to 35% by volume.
A composite sintered contact component, wherein a sintered contact material, containing 10% by volume or more a Fe base alloy phase having a composition range which causes an order-disorder transition, is integrated with a sheet-like, cylindrical or substantially cylindrical backing made from an iron base material, and wherein said Fe base alloy phase contains Fe as a chief component and at least 12 to 30 wt % Al, wherein said sintered contact material is sinter-bonded to the backing in independently dispersed island form in an amount of 30 to 70% by area with respect to the area of the backing, and recesses formed between the independent islands of the contact material are filled with grease or a solid lubricant while the contact material is sliding.
A composite sintered contact component, wherein a sintered contact material, containing 10% by volume or more a Fe base alloy phase having a composition range which causes an order-disorder transition, is integrated with a sheet-like, cylindrical or substantially cylindrical backing made from an iron base material, and wherein said Fe base alloy phase contains Fe as a chief component and at least 12 to 30 wt % Al, wherein said sintered contact material is holed, making independent recesses in an amount of 30 to 70% by area with respect to the area of the backing and sinter-bonded to the backing, and the independent recesses are filled with grease or a solid lubricant while the contact material is sliding.
A composite sintered contact component, wherein a sintered contact material, containing 10% by volume or more a Fe base alloy phase having a composition range which causes an order-disorder transition, is integrated with a sheet-like, cylindrical or substantially cylindrical backing made from an iron base material, and wherein said Fe base alloy phase contains Fe as a chief component and at least 12 to 30 wt % Al.
Dependencies are inferred from the claim text.