Piston ring material and piston ring

Details Piston ring material and piston ring Piston ring material and piston ring

1989-04-18

1990-08-14

Yee, Deborah

Alloys or metallic compositions

Ferrous

Nine percent or more chromium containing

420 37, 148318, C22C 3830

Patent

active

049485563

ABSTRACT:
A piston ring material is capable of improving the heat resistance, abrasion resistance, nitriding characteristics and scuffing resistance that are required in a piston ring, the C content is 0.6 to 1.5%, and Co is contained in high Cr steel. The piston ring material consists by weight of 0.6 to 1.5% C, not more than 1.0% Si, not more than 1.0% Mn, 7.0 to 25.0% Cr, 2.0 to 13.0% Co, and the balance Fe and incidental impurities. In the piston ring material, a part of Fe can be replaced by at least one kind of Mo and W, and/or V, Nb, or Ni. A piston ring has a nitrided layer provided at least on a sliding surface thereof which slides against a cylinder wall.

REFERENCES:
patent: 1357549 (1920-11-01), Fahrenwald
patent: 3554735 (1971-01-01), Hiltebrand

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