| 摘要 |
PURPOSE:To improve the wear resistance, by scuffing resistance and fatigue strength of the title steel by increasing the Mo contents in a steel and optimumly regulating other contents. CONSTITUTION:The compsn. of the steel for a piston ring is constituted of, by weight, 0.55-1.10% C, <=2.0% Si, <=2.0% Mn, 11-15% Cr, 1.6-6.0% Mo and the balance Fe with inevitable impurities. One or more kinds among 0.2-2.0% Ni, 0.1-1.5% V and 0.05-0.7% Nb are furthermore incorporated thereto at need. Said steel is used at least to a cylinder wall and sliding surface and is subjected to a surface treatment such as nitriding, plating and thermal spraying at need. In the use of said steel, the assembling accuracy of a piston ring can be improved. |
