发明名称 |
HIGH FATIGUE-STRENGTH STEEL WIRE AND SPRING, AND PROCESSES FOR PRODUCING THESE |
摘要 |
<p>A steel wire of pearlite structure containing 0.8-1.0 mass % of C and 0.8-1.5 mass % of Si is disclosed. In the cross section of the steel wire the average hardness in a region up to 100 mu m from the surface thereof is at least 50 higher that that in a deeper region based on micro-Vickers hardness. The steel wire is manufactured by working a wire rod having the abovementioned chemical composition through shaving, patenting and drawing processes, then strain-relief annealing the resultant wire, and thereafter subjecting the thus annealed wire to a short peening process. The steel wire can be produced through a drawing process without applying a quenching and tempering process, and are superior in heat resistance and fatigue strength.</p> |
申请公布号 |
EP1036851(A1) |
申请公布日期 |
2000.09.20 |
申请号 |
EP19980937822 |
申请日期 |
1998.08.13 |
申请人 |
SUMITOMO ELECTRIC INDUSTRIES, LTD. |
发明人 |
KAWABE, NOZOMU;MURAI, TERUYUKI |
分类号 |
B21F35/00;C21D7/06;C21D9/52;C22C38/00;(IPC1-7):C22C38/00;C22C38/02 |
主分类号 |
B21F35/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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