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    • 8. 发明申请
    • High strength spring steel wire and high strength spring and methods of production of the same
    • 高强度弹簧钢丝和高强度弹簧及其生产方法相同
    • US20110310924A1
    • 2011-12-22
    • US13199203
    • 2011-08-22
    • Manabu KubotaMasayuki Hashimura
    • Manabu KubotaMasayuki Hashimura
    • G01K17/00
    • C21D8/065C21D1/25C21D1/42C21D9/525Y02P10/253
    • The present invention provides high strength spring and high strength spring steel wire superior in corrosion fatigue characteristics and methods of production of the same, that is, a high strength spring steel wire and high strength spring containing, by mass %, C: 0.35 to 0.50%, Si: 1.00 to 3.00%, and Mn: 0.10 to 2.00%, restricting P to 0.015% or less and S to 0.015% or less, having a balance of Fe and unavoidable impurities, and, when raising the temperature in the range from 50° C. to 600° C. by 0.25° C./s and measuring the differential scanning calories, having the only peak of the exothermic reaction present at 450° C. or more. A method of production of high strength spring characterized by tempering under conditions where the tempering temperature T[K], tempering time t[s], and content Si % [mass %] of Si satisfy the following: 16000≦(T−40×[Si %])×(31.7+log t)≦23000.
    • 本发明提供了一种耐腐蚀疲劳特性优异的高强度弹簧和高强度弹簧钢丝及其制造方法,即高强度弹簧钢丝和高强度弹簧,以质量%计含有C:0.35〜0.50 %,Si:1.00〜3.00%,Mn:0.10〜2.00%,将P限制在0.015%以下,S:0.015%以下,余量为Fe和不可避免的杂质,当将温度升高到 从50℃至600℃,0.25℃/秒,并测量差示扫描卡路里,其中放热反应的唯一峰值为450℃或更高。 一种高强度弹簧的制造方法,其特征在于,在回火温度T [K],回火时间t [s]以及Si的含量Si%[质量%]满足以下条件的条件下进行回火:16000≦̸(T-40× [Si%])×(31.7 + log t)≦̸ 23000。