发明名称 |
CARBURIZED COMPONENT AND METHOD FOR MANUFACTURING SAME |
摘要 |
The present invention provides a carburized part which is formed by processing a steel into a shape of a part and performing a carburizing treatment on the steel, the steel having a composition consisting essentially of, in terms of % by mass: 0.10% to 0.40% of C; 0.05% to 2.00% of Si; 0.30% to 2.00% of Mn; 0.30% to 3.00% of Cr; 0.025% or less of N; and as a pinning particle forming element which forms a pinning particle by nitrification, one or two or more elements selected from: 0.020% to 0.100% of Al; 0.01% to 0.20% of Nb; and 0.005% to 0.20% of Ti, and optionally: 0.80% or less of Mo, with the remainder being Fe and inevitable impurities, in which a crystal grain size number of a surface layer of the part at a depth of 50 μm or less from a surface is greater than 5, and the crystal grain size number of an inner portion of the part at a depth of 3 mm or more from the surface is 5 or less. |
申请公布号 |
US2016122858(A1) |
申请公布日期 |
2016.05.05 |
申请号 |
US201414895098 |
申请日期 |
2014.06.03 |
申请人 |
DAIDO STEEL CO., LTD. |
发明人 |
ANDOH Tomohiro;UMEMORI Naoki;MORITA Toshiyuki;MATSUMURA Yasushi |
分类号 |
C23C8/34;C22C38/26;C22C38/22;C21D1/773;C22C38/04;C22C38/02;C22C38/00;C21D6/00;C22C38/28;C22C38/06 |
主分类号 |
C23C8/34 |
代理机构 |
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代理人 |
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主权项 |
1. A carburized part which is formed by processing a steel into a shape of a part and performing a carburizing treatment on the steel, the steel having a composition consisting essentially of, in terms of % by mass:
0.10% to 0.40% of C; 0.05% to 2.00% of Si; 0.30% to 2.00% of Mn; 0.30% to 3.00% of Cr; 0.025% or less of N; and as a pinning particle forming element which forms a pinning particle by nitrification, one or two or more elements selected from: 0.020% to 0.100% of Al; 0.01% to 0.20% of Nb; and 0.005% to 0.20% of Ti, and optionally: 0.80% or less of Mo, with the remainder being Fe and inevitable impurities, wherein a crystal grain size number of a surface layer of the part at a depth of 50 μm or less from a surface is greater than 5, and the crystal grain size number of an inner portion of the part at a depth of 3 mm or more from the surface is 5 or less. |
地址 |
Nagoya-shi, Aichi JP |