| 发明名称 | Carburized steel part having excellent low cycle bending fatigue strength | ||
| 摘要 | A carburized steel part having excellent low cycle bending fatigue strength which is comprised of a steel material which contains, by mass %, C: 0.1 to 0.6%, Si: 0.01 to 1.5%, Mn: 0.3 to 2.0, P: 0.02% or less, S: 0.001 to 0.15%, N: 0.001 to 0.03%, Al: 0.001 to 0.06%, and O: 0.005% or less and has a balance of substantially iron and unavoidable impurities and which is carburized and quenched, and then tempered, which steel part has a surface hardness of HV550 to HV800 and a core hardness of HV400 to HV500. | ||
| 申请公布号 | US9469883(B2) | 申请公布日期 | 2016.10.18 |
| 申请号 | US201314014983 | 申请日期 | 2013.08.30 |
| 申请人 | NIPPON STEEL & SUMITOMO METAL CORPORATION;SANYO SPECIAL STEEL CO., LTD. | 发明人 | Kozawa Shuji;Kubota Manabu;Kada Osamu;Nishikawa Motohiro;Tanaka Takashi;Tsunekage Norimasa |
| 分类号 | C22C38/28;C22C38/26;C21D9/32;C23C8/22;C21D1/68;C21D1/06;C22C38/00 | 主分类号 | C22C38/28 |
| 代理机构 | Birch, Stewart, Kolasch & Birch, LLP | 代理人 | Birch, Stewart, Kolasch & Birch, LLP |
| 主权项 | 1. A carburized steel part having excellent low cycle bending fatigue strength which is comprised of a steel material consisting of, by mass %, C: 0.45 to 0.6%, Si: 0.06 to 1.5%, Mn: 0.3 to 2.0%, P: 0.02% or less, S: 0.001 to 0.15%, N: 0.001 to 0.03%, Al: 0.001 to 0.06%, Ti: 0.01 to 0.2%, B: 0.0002 to 0.005%, Cr: 1.2 to 3.0%, Ca: 0.0002 to 0.005%, O: 0.005% or less and Cu: 0.1 to 2.0, and one or both of Nb: 0.01 to 0.2% and V: 0.03 to 0.2%, and a balance of substantially iron and unavoidable impurities, wherein the steel material which is carburized, quenched, and then tempered, wherein said carburized steel part has a surface hardness of HV550 to HV800, and a core hardness of HV400 to HV500. | ||
| 地址 | Tokyo JP | ||