Process for the production of tools

Details Process for the production of tools Process for the production of tools

1990-10-17

1991-07-02

Lechert, Jr., Stephen J.

Powder metallurgy processes

Powder metallurgy processes with heating or sintering

Metal and nonmetal in final product

419 14, 419 23, 419 28, 419 29, 419 30, 419 31, 419 32, 419 38, 419 43, 419 49, B22F 324

Patent

active

050283863

ABSTRACT:
In a process for making tools from medium and high alloy steels or stellites by superplastic precision forming a powder metallurgically produced starting material with an equiaxed structure and more than 30% by volume of carbidic and/or boridic precipitated phase of particle size 1 to 0.2 .mu.m is given a matrix grain size of 1 to 3 .mu.m by thermomechanical processing (hot forming) and formed in the superplastic state.

REFERENCES:
patent: 3976482 (1976-08-01), Larson
patent: 4073648 (1978-02-01), Volin et al.
patent: 4582536 (1986-04-01), Raybould
H. Ruhfus, "Warmebehandlung der Einsatzstoffe", 1958, pp. 75 to 78.

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