发明名称 |
Spring steel wires and process for producing the same. |
摘要 |
A spring steel wire that has a tensile strength of at least 2,000 N/mm<2> and a surface roughness of not more than 5 mu m in terms of Rz, and a spring steel wire that consists essentially of from 0.5 to 0.8% by weight of C, from 1.2 to 2.5% by weight of Si, from 0.4 to 0.8% by weight of Mn, from 0.7 to 1.0% by weight of Cr, from 0.005 to 0.030% by weight of N and at least two elements selected from the group consisting of from 0.1 to 0.6% by weight of V, from 0.05 to 0.50% by weight of Mo and from 0.05 to 0.50% by weight of W, with the balance being Fe and incidental impurities containing not more than 0.005% by weight of Al and not more than 0.005% by weight of Ti, said wire having a surface roughness of not more than 5 mu m in terms of Rz, as well as production processes therefor. |
申请公布号 |
EP0614994(A1) |
申请公布日期 |
1994.09.14 |
申请号 |
EP19930108711 |
申请日期 |
1993.05.28 |
申请人 |
SUMITOMO ELECTRIC INDUSTRIES, LTD. |
发明人 |
YAMAO, NORIHITO, C/O ITAMI WORKS OF SUMITOMO;MURAI, TERUYUKI, C/O ITAMI WORKS OF SUMITOMO |
分类号 |
C22C38/00;C22C38/02;C22C38/18;C22C38/28;C22C38/34;C25F3/24;F01L1/46 |
主分类号 |
C22C38/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|