Steel having good wear resistance

Details Steel having good wear resistance Steel having good wear resistance

1988-06-10

1990-10-30

Yee, Deborah

Alloys or metallic compositions

Ferrous

Nine percent or more chromium containing

420 67, 420 69, 148318, 148325, C22C 3818

Patent

active

049667513

ABSTRACT:
A steel having good wear resistance which contains 0.55-1.10% of C, up to 2.0% of Si, up to 2.0% of Mn, 12.0-25.0% of Cr and particularly suitable as a material for piston rings or rocker arms. Further addition of 0.05-1.10% of Al to the above steel gives a steel improved in properties for spheroidization of carbides and uniformization of carbide particle size, leading to further enhancement of wear resistance. If required 0.20-2.0% of Ni may be added to the steels, whereby corrosion resistance, toughness and hardenability are improved. An addition of at least one of 0.2-3.0% of Mo, 0.1-1.5% of V and 0.05-0.70% of Nb to the steels improves high-temperature strength and surface hardness. The steel is surface treated by gas nitriding of the like in a surface area for sliding contact with an opponent member.

REFERENCES:
patent: 3645724 (1972-02-01), Goldberg
patent: 3859147 (1975-01-01), Philip
patent: 3990892 (1976-11-01), Machi et al.
patent: 4490175 (1984-12-01), Matsuzaki

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