Process for producing a sintered product of copper-infiltrated i

Details Process for producing a sintered product of copper-infiltrated i Process for producing a sintered product of copper-infiltrated i

1983-09-01

1984-11-27

Sebastian, Leland A.

Stock material or miscellaneous articles

All metal or with adjacent metals

Having metal particles

419 2, 419 6, 419 47, 428567, B22F 310, B32B 518

Patent

active

044851472

ABSTRACT:
A process for producing a Cu-infiltrated sintered Fe-base material without requiring a separate Cu infiltration step is disclosed. The process comprises the steps of preparing two powder mixes, one having a predetermined composition with a powder of infiltrating material containing Cu powder or Cu alloy powder as the primary component, and the other having a predetermined composition without said powder of infiltrating material; pressing the two powder mixes into a compact having said powder of infiltrating material present locally; and sintering the compact under ordinary conditions so as to cause the infiltrant to penetrate into the infiltrant-free area simultaneously with the sintering.
Also disclosed is a two-layer valve seat produced by this process. One layer of the valve seat accounts for the principal part of the seat and is made of an Fe-base sintered material containing Cu or Cu alloy as an infiltrant, and the other layer provides a layer to contact the valve and is infiltrated with Cu through pores during the sintering.

REFERENCES:
patent: 3619170 (1971-11-01), Fisher et al.
patent: 4008051 (1977-02-01), Cadle
patent: 4168162 (1979-09-01), Shafer

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