Alloyed steel powder for powder metallurgy

Details Alloyed steel powder for powder metallurgy Alloyed steel powder for powder metallurgy

1988-08-01

1991-01-15

Zimmerman, John J.

Stock material or miscellaneous articles

All metal or with adjacent metals

Composite powder

B22F 102

Patent

active

049853090

ABSTRACT:
An alloyed steel powder for metallurgy is provided with a water-atomized alloyed steel powder wherein an alloy component, an oxide of which is difficult to be reduced with hydrogen in the production of the powder, has been prealloyed in a composition range not exerting a bad influence upon compressibility of the steel powder, and an alloy component or components easier to be reduced with hydrogen than the above alloy component, the said easily reducible alloy component or components being partially diffused and adhered in a powdered form to the particle surfaces of the water-atomized alloyed steel powder.
The composite powder of the invention has a coating layer of at least one element selected from nickel, copper, molybdenum and tungsten which is partially diffused and adhered in a powder form to the surface of a chromium containing prealloyed steel powder.

REFERENCES:
patent: 2646456 (1953-07-01), Jacquier
patent: 4011077 (1977-03-01), Kaufman
patent: 4048608 (1978-07-01), Matty et al.
patent: 4069044 (1978-01-01), Mocarski et al.
patent: 4266974 (1981-05-01), Nitta et al.
patent: 4561893 (1985-12-01), Takajo
patent: 4578115 (1986-03-01), Harrington et al.
patent: 4643765 (1987-02-01), Takajo
patent: 4799955 (1989-01-01), McClellan
patent: 4818567 (1989-04-01), Kemp et al.

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