Sliding member, and method and apparatus for producing the same

Details Sliding member, and method and apparatus for producing the same Sliding member, and method and apparatus for producing the same

1991-06-27

1993-02-16

Robinson, Ellis P.

Stock material or miscellaneous articles

Composite

Of metal

428472, 4284721, 4284722, 428688, 428689, 428697, 428698, 428699, 148318, 148902, B32B 904

Patent

active

051870177

ABSTRACT:
A sliding member having a layer of FeS.sub.2 on its surface is formed by sulphonitriding the member by heatint it at 480.degree. C.-600.degree. C. in the presence of both 10-500 ppm of a hydrogen sulfide gas and 20-70 vol % ammonia gas. An alternate heating method involves performing a primary heat treatment on the sliding member at 450.degree.-540.degree. C. in the presence of 50-200 ppm of a hydrogen sulfite gas and a 10-70 vol % ammonia gas, then ceasing the supply of the ammonia gas, slowly reducing the temperature to between 200.degree.-350.degree. C., and performing a secondary heat treatment at that temperature level.

REFERENCES:
patent: 3853602 (1974-12-01), Nakamura
patent: 4273749 (1981-06-01), Kimura et al.
patent: 4364995 (1982-12-01), Crawford et al.
patent: 4513057 (1985-04-01), Peters
patent: 4738730 (1988-04-01), Ferguson
patent: 4820591 (1989-04-01), Ramanarayanan
patent: 4944663 (1990-07-01), Iizuka et al.
Chemical Abstracts, vol. 103, No. 2, Jul. 1985, p. 227, col. 103, "Sulfurizing and Nitriding Iron Products with Gas".
Chemical Abstracts, vol. 97, No. 26, Dec. 1982, p. 282, col. 97, "Ferritic, Sulfurizing Thermo-Chemical Treatment".
Chemical Abstracts, vol. 93, No. 14, Oct. 1980, p. 223, col. 93, "Highly Wear-Resistant Sliding Parts".
Chemical Abstracts, vol. 64, 1966, "Sulfatizing and Nitriding of High Speed Steels in H.sub.2 S and NH.sub.3 ".

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