Method of making a compound valve seat

Details Method of making a compound valve seat Method of making a compound valve seat

1983-06-09

1984-09-18

Sebastian, Leland A.

Powder metallurgy processes

Powder metallurgy processes with heating or sintering

Making composite or hollow article

419 5, 419 7, 264113, 428548, B22F 300, B22F 708

Patent

active

044723504

ABSTRACT:
A valve seat or similar article produced by sintering a compound body is improved in economy and producibility by employing a method wherein the amount of a second powder for forming the compound body is controlled so as to be minimized. A first powder is initially charged into a compression space and lightly compressed to form a preparatory compact of a desired shape. Subsequently, the second powder is charged in over the preparatory compact to a degree controlled by the displacement of the compact, and the preparatory compact and the second powder are forcefully compressively integrally molded to form a final compact which is then sintered to form the finished product.

REFERENCES:
patent: 4419413 (1983-12-01), Ebihara

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