| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide rolling members for a fuel cell system which can suppress hydrogen embrittlement separation while suppressing the increase of production cost, and to provide a rolling bearing for a fuel cell system. <P>SOLUTION: An outer ring, an inner ring and a ball are rolling members for a fuel battery system composing a ball bearing 1 for a fuel cell pivoting a rotary shaft 30 rotating for press-feeding gas freely rotatably to a housing 31 in a gas compressor 3 included in a fuel cell system. Then, the outer ring, inner ring and ball are each made of steel comprising, by mass, 0.25 to 0.65% carbon, 0.15 to 0.35% silicon and 0.6 to 0.9% manganese, and the balance iron with inevitable impurities, and in which the content of chromium is suppressed to ≤0.3%, and a nitrogen-enriched layer is formed on the surface layer part. <P>COPYRIGHT: (C)2008,JPO&INPIT |
