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发明授权
CN106661691B 碳氮共渗轴承用钢 有权

碳氮共渗轴承用钢
摘要：
本发明提供淬透性优异，淬火及回火后的韧性、耐磨耗性及表面起点剥离寿命优异的碳氮共渗轴承用钢。本实施方式的碳氮共渗轴承用钢以质量％计含有C：0.22～0.45％、Si：0.50％以下、Mn：0.40～1.50％、P：0.015％以下、S：0.005％以下、Cr：0.30～2.0％、Mo：0.10～0.35％、V：0.20～0.40％、Al：0.005～0.10％、N：0.030％以下、O：0.0015％以下，余量为Fe及杂质，且满足式(1)及式(2)。1.20 2.20···(2)。
摘要（英）：

Provided is a carbonitrided bearing part which has high hardenability and toughness, and is excellent in wear resistance and surface-originated flaking life. A carbonitrided bearing part of the present embodiment has a chemical composition containing, in mass%, C: 0.15 to 0.45%, Si: not more than 0.50%, Mn: 0.40 to 1.50%, P: not more than 0.015%, S: not more than 0.005%, Cr: 0.30 to 2.0%, Mo: 0.10 to 0.35%, V: 0.20 to 0.40%, Al: 0.005 to 0.10%, N: not more than 0.030%, and O: not more than 0.0015%, with the balance being Fe and impurities, and satisfying Formulae (1) and (2). At surface, C concentration is 0.7 to 1.2%, N concentration is 0.15 to 0.6%, and Rockwell hardness HRC is 58 to 65. 1.20 < 0.4 Cr + 0.4 Mo + 4.5 V < 2.60 2.7 C + 0.4 Si + Mn + 0.8 Cr + Mo + V > 2.20

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