Process product, and powder for producing high strength structur

Details Process product, and powder for producing high strength structur Process product, and powder for producing high strength structur

1991-05-31

1992-09-08

Lechert, Jr., Stephen J.

Specialized metallurgical processes, compositions for use therei

Compositions

Consolidated metal powder compositions

75255, 419 33, 419 48, 419 60, 419 68, B22F 100

Patent

active

051455030

ABSTRACT:
In a process for producing a high strength structural member by sintering a starting powder material, a powder mixture of a basic powder and an additional powder is used as the starting powder material. The basic powder is comprised of at least one of an amorphous single-phase alloy powder and at least one kind of a mixed-phase alloy powder which contains a crystalline phase and an amorphous phase and has a crystalline phase volume fraction C (Vf) less than 30%, and the additional powder is comprised of a mixed-phase alloy powder containing a crystalline phase and an amorphous phase and having a crystalline phase volume fraction C (Vf) of at least 30% to less than 80%. The relationship between the minimum volume fraction Pm (Vf) of the additional powder in the starting powder material and the crystalline phase volume fraction C (Vf) in the additional powder is established such that Pm (Vf)=-0.7 C (Vf)+61. This ensures that a structural member having a high strength and a high toughness can be produced.

REFERENCES:
patent: 4711823 (1987-12-01), Shiina
patent: 4834941 (1989-05-01), Shiina
patent: 4867806 (1989-09-01), Shiina

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