Engine tappet of high abrasion resistance and method for manufac

Details Engine tappet of high abrasion resistance and method for manufac Engine tappet of high abrasion resistance and method for manufac

1997-12-18

1999-11-30

Jenkins, Daniel J.

Stock material or miscellaneous articles

All metal or with adjacent metals

Having metal particles

428569, 75240, B22F 508, B22F 708

Patent

active

059939788

ABSTRACT:
An engine tappet of high abrasion resistance, whose surface is coated with a sintered layer. This sintered layer is prepared from a binder comprising about 50-100 wt % of nickel powder, about 0-45 wt % of Cr, about 0-35 wt % of Mo, about 0-10 wt % of Al, about 0-25 wt % of Co, about 0-10 wt % of Cu and inevitably mixed impurities; and from hard particles selected from the group consisting of carbides, nitrides, borides and the mixtures thereof. Also, there is provided an engine tappet which is coated with an alloy powder composition comprising about 44-88 wt % of WC, about 4-10 wt % of Co, about 15-50 wt % of Ni, about 5-20 wt % of Cr, about 0.5-4 wt % of B, about 2-4 wt % of Fe, about 0.5-4 wt % of Si, about up to 1.0 wt % of C and inevitably mixed impurities.

REFERENCES:
patent: 4230491 (1980-10-01), Behnke
patent: 4485150 (1984-11-01), Tsuno
patent: 4778522 (1988-10-01), Maki et al.
patent: 4863513 (1989-09-01), Umeha et al.
patent: 5060607 (1991-10-01), Tanaguchi
patent: 5859376 (1999-01-01), Ishibashi et al.

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