Surface treated cast iron bearing element

Details Surface treated cast iron bearing element Surface treated cast iron bearing element

1994-08-22

1995-11-21

Yee, Deborah

Metal treatment

Stock

Ferrous

148906, 148512, 148525, C22C 3700, C21D 109

Patent

active

054683084

ABSTRACT:
A bearing blank is cast or machined of cast iron to a configuration near a final shape of a desired bearing element. A first surface of the bearing blank, corresponding to a sliding surface of the desired bearing element, is remelted while other portions of the bearing blank remain in a solid state. The remelted first surface is quenched such that fine particles of iron carbide precipitate in a remelted zone having an increased hardness and a decreased presence of graphite particles. A bearing element having a core portion composed of cast iron and an integral first surface portion including a precipitate of fine iron carbide particles, and having greater hardness and lesser incidence of graphite particles than the core portion, is also described.

REFERENCES:
patent: 4303137 (1981-12-01), Fischer
patent: 4313771 (1982-02-01), Lorenzo et al.
patent: 4414038 (1983-11-01), Dausinger et al.
patent: 4456811 (1984-06-01), Hella et al.
patent: 4474861 (1984-10-01), Ecer
patent: 4708752 (1987-11-01), Kar
patent: 5114499 (1992-05-01), Kusunoki
Article entitled Options in Surfacing through Laser Technology from Compressed Air magazine, Oct. 1989, pp. 8-11.

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