Hard sintered component and method of manufacturing such a compo

Details Hard sintered component and method of manufacturing such a compo Hard sintered component and method of manufacturing such a compo

1992-05-28

1995-04-04

Mai, Ngoclan T.

Specialized metallurgical processes, compositions for use therei

Compositions

Consolidated metal powder compositions

75239, 75240, 75242, 75246, 419 13, 419 14, 419 15, 419 16, 419 36, 419 38, C22C 2904, B22F 100

Patent

active

054033730

ABSTRACT:
A hard sintered component of a cemented carbide or a stellite alloy having a complex three-dimensional shape and a small hole or the like and the high strength originally provided by the used material for making the component without any secondary working, is formed by injection molding a compact molding die having an inner mold surface roughness R.sub.max of not more than 3 .mu.m. Where a core pin is used the outer surface of the pin has a surface roughness R.sub.max of not more than 3 .mu.m. The compact is then sintered. The hard sintered component is composed of a cemented carbide or a stellite alloy. In such a hard sintered component, the surface of a complex three-dimensional shape such as a disc portion or a thin portion, or the inner surface of a small hole, is defined by a sintered surface which has a surface roughness R.sub.max of not more than 4 .mu.m.

REFERENCES:
patent: 4113480 (1978-09-01), Rivers
patent: 4721599 (1988-01-01), Nakamura
patent: 4867943 (1989-09-01), Kiyota
patent: 5015294 (1991-05-01), Ludwig
patent: 5045276 (1991-09-01), Kijima
patent: 5108492 (1992-04-01), Kiyoto et al.
patent: 5141554 (1992-08-01), Kijima

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