Phosphorus steel powder and a method of manufacturing the same

Details Phosphorus steel powder and a method of manufacturing the same Phosphorus steel powder and a method of manufacturing the same

1976-10-26

1978-05-23

Stallard, W.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 05AA, 75 05BA, 75251, 75252, B22F 100

Patent

active

040908682

ABSTRACT:
A phosphorus steel powder for manufacturing sintered details having an extremely small tendency to brittleness ruptures consists of iron or steel powder substantially free from phosphorus, mixed with a phosphorus powder containing in all less than 4% impurities which are at the sintering temperature more easily oxidized than the main components iron and phosphorus. The iron-ferrophosphorus mixture is heated with or without the addition of oil in reducing atmosphere to a temperature of between 65.degree. and 900.degree. C for a period of 15 minutes to 2 hours to improve the protection against segregation.

REFERENCES:
patent: 3357817 (1967-12-01), Harnisch et al.
patent: 3836355 (1974-09-01), Lindskog et al.
patent: 3839014 (1974-10-01), Cziska et al.

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