Method of producing iron powder article

Details Method of producing iron powder article Method of producing iron powder article

1988-02-29

1989-07-18

Lechert, Jr., Stephen J.

Powder metallurgy processes

Powder metallurgy processes with heating or sintering

Metal and nonmetal in final product

75243, 75244, 75246, 419 12, 419 45, 419 47, B22F 100

Patent

active

048491640

ABSTRACT:
A sintering aid is disclosed for use in a powder metallurgical method for manufacturing an iron alloy article by compacting and sintering a predominantly iron powder mixture comprising carbon powder and a boron-containing additive, such as nickel boride. The sintering aid comprises an oxygen getter to inhibit boron oxidation that, if formed, is believed to retard carbon diffusion. The sintering aid also preferably includes a second constituent to produce, in combination with the getter, a melting point suitable for forming a transient liquid phase during the early stages of sintering. Preferred sintering aids include intermetallic iron titanium compounds, intermetallic ferro-vanadium compound and intermetallic nickel magnesium compound.

REFERENCES:
patent: 4537323 (1985-08-01), Ditchek et al.
patent: 4618473 (1986-10-01), Jandeska, Jr.
patent: 4678510 (1987-07-01), Jandeska, Jr. et al.
patent: 4724000 (1988-02-01), Larson et al.

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