公开(公告)号：US5904830A

公开(公告)日：1999-05-18

申请号：US483301

申请日：1995-06-07

申请人： Norihito Yamao ,  Teruyuki Murai

发明人： Norihito Yamao ,  Teruyuki Murai

IPC分类号： C22C38/00 ,  C22C38/02 ,  C22C38/18 ,  C22C38/28 ,  C22C38/34 ,  C25F3/24 ,  F01L1/46

CPC分类号： C22C38/02 ,  C22C38/001 ,  C22C38/18 ,  C22C38/34 ,  F01L1/462

摘要： A spring steel wire that has a tensile strength of at least 2,000 N/mm.sup.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.

摘要翻译： 拉伸强度为2000N / mm2以上且Rz为5μm以下的弹簧钢丝，以及以0.5〜0.8重量％的C为基准的弹簧钢丝 ，1.2至2.5重量％的Si，0.4至0.8重量％的Mn，0.7至1.0重量％的Cr，0.005至0.030重量％的N和至少两种选自以下的元素： 的0.1至0.6重量％的V，0.05至0.50重量％的Mo和0.05至0.50重量％的W，余量为Fe和不超过0.005重量％的Al的杂质， 不超过0.005重量％的Ti，所述线的Rz的表面粗糙度不大于5μm，以及其制造方法。