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发明申请
US20100098577A1 SI-KILLED STEEL WIRE ROD AND SPRING EXCELLENT IN FATIGUE PROPERTIES 有权
SI-KILLED钢丝绳和弹簧在疲劳性能方面优秀

SI-KILLED STEEL WIRE ROD AND SPRING EXCELLENT IN FATIGUE PROPERTIES
摘要：
A Si-killed steel wire rod for obtaining a spring excellent in fatigue properties and a spring excellent in fatigue properties obtained from the steel wire rod are provided.The Si-killed steel wire rod of the present invention contains Sr: 0.03-20 ppm (means “mass ppm”, hereinafter the same), Al: 1-30 ppm and Si: 0.2-4% (means “mass %”, hereinafter the same) respectively, and contains Mg and/or Ca by a range of 0.5-30 ppm in total.Also, in the Si-killed steel wire rod of the present invention, oxide-based inclusions present in the wire rod contain SiO2: 30-90%, Al2O3: 2-50%, MgO: 35% or below (not inclusive of 0%), CaO: 50% or below (not inclusive of 0%), MnO: 20% or below (not inclusive of 0%) and SrO: 0.2-15% respectively, and total content of (CaO+MgO) is 3% or above.A spring excellent in fatigue properties can be obtained by forming the spring from such steel wire rod.
摘要（中）：

提供了一种用于获得疲劳特性优异的弹簧和由钢丝棒获得的疲劳特性优异的弹簧的Si镇静钢线材。 本发明的Si镇静钢线材含有Sr：0.03〜20ppm（以下相同的质量ppm），Al：1-30ppm，Si：0.2〜4％（意指“质量％”， 以下相同），并且含有总共0.5-30ppm范围的Mg和/或Ca。 此外，在本发明的Si镇静钢线材中，线材中存在的氧化物系夹杂物含有SiO 2：30〜90％，Al 2 O 3：2-50％，MgO：35％以下（不包括0 ％），CaO：50％以下（不包括0％），MnO：20％以下（不包括0％）和SrO：0.2〜15％，（CaO + MgO）的总含量为3 ％或以上。 通过从这种钢丝线形成弹簧可以获得疲劳性能优异的弹簧。

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