| 摘要 |
PROBLEM TO BE SOLVED: To provide a piston ring material for an internal combustion engine, which has superior wire-drawability, straightness, corrosion resistance, abrasion resistance and heat resistance, and prevents "heat settling" while being ion-plated. SOLUTION: The piston ring material comprises, by wt.%, 0.10-0.20 C, 0.5-3.0 Si, 1.0-2.5 Ni, 10.0-17.0 Cr, 1.0-3.5 Mo, 0.05-0.20 N and the balance Fe with unavoidable impurities. The piston ring material has the superior wire-drawability because of containing little carbon, the straightness after having been tempered at a high temperature, improved corrosion resistance even after having been tempered at a high temperature, can be quenched/tempered in spite of containing little carbon, a high strength due to nitrides precipitated during quenching, the superior heat resistance due to the nitrides formed during the quenching and added molybdenum, and reduced "heat settling" occurring during ion plating. COPYRIGHT: (C)2005,JPO&NCIPI
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