Powder metallurgy processes – Powder metallurgy processes with heating or sintering – Making porous product
Patent
1984-12-05
1986-05-13
Lechert, Jr., Stephen J.
Powder metallurgy processes
Powder metallurgy processes with heating or sintering
Making porous product
419 5, 419 23, 419 27, 419 28, 419 29, 419 53, 419 54, 164314, 428548, 428550, B22F 310
Patent
active
045885516
ABSTRACT:
An article comprising a first portion which is formed porously by sintering of an alloy or cermet material and a second portion which is formed of a metal and intimately bonds to the first portion. For example, the article is a rocker arm for an automotive internal combustion engine, in which first portion is the wear-resistant tip portion and the second portion the body portion. The second portion is formed by molten metal forging, with the sintered first portion set in the mould as an insert, such that the molten metal under pressure is forced to infiltrate into the pores of the sintered first portion at least in a region contiguous to the interface between the first and second portions. This article features very high strength of the bond at the interface between the first and second portions.
REFERENCES:
patent: 3808659 (1974-05-01), Alger et al.
patent: 4412643 (1983-11-01), Sato et al.
Iijima Takaaki
Inomata Ryuji
Nishiura Takeshi
Suzuki Hideaki
Tanaka Eiji
Lechert Jr. Stephen J.
Nissan Motor Co,. Ltd.
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