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CN107148483A 高强度中空弹簧用钢的制造方法 有权 转让

高强度中空弹簧用钢的制造方法
摘要：
提供一种制造抗氢脆性能优异的高强度中空弹簧用钢的方法。一种对于作为中空弹簧的原材使用的无缝管进行淬火、回火而得到的中空弹簧用钢的制造方法，其中，对于含有规定成分的无缝管，以满足下述(1)的淬火条件、和下述(2)的回火条件的方式进行热处理。(1)淬火条件26000≤(T1+273)×(log(t1)+20)≤29000…式(1)900℃≤T1≤1050℃，10秒≤t1≤1800秒。在此，T1的意思是淬火温度(℃)，t1意思是900℃以上的温度域的停留时间(秒)。(2)回火条件13000≤(T2+273)×(log(t2)+20)≤15500…式(2) T2≤550℃，t2≤3600秒。在此，T2意思是回火温度(℃)，t2意思是从加热开始至冷却完毕的合计时间(秒)。
摘要（英）：

Provided is a method for manufacturing steel for a high-strength hollow spring having excellent resistance to hydrogen embrittlement. The method is for manufacturing steel for a hollow spring obtained by quenching and tempering of a seamless pipe used as the material for the hollow spring, wherein a seamless pipe containing prescribed components is subjected to heat treatment so as to satisfy the quenching conditions of (1) below and the tempering conditions of (2) below. (1) Quenching conditions 26,000 <= (T1 + 273) * (log(t1) + 20) <= 29,000 ... equation (1) 900 DEG C <= T1 <= 1,050 DEG C, 10 sec <= t1 <= 1,800 sec, where T1 denotes the quenching temperature (DEG C) and t1 the residence time (sec) in a temperature zone of 900 DEG C and above. (2) Tempering conditions 13,000 <= (T2 + 273) * (log(t2) + 20) <= 15,500 ... equation (2) T2 <= 550 DEG C, t2 <= 3,600 sec, where T2 denotes the tempering temperature (DEG C) and t2 total time (sec) from initiation of heating to completion of cooling.

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