新型超高强度低氢脆敏感性扭杆弹簧用钢
发布时间：2019-05-01 07:09
【摘要】：通过SEM、TEM、XRD、化学相分析等方法对比研究新型扭杆弹簧用40Si2Ni2Cr Mo V钢(代号N1)和现有45Cr Ni Mo VA钢微观组织及其对力学性能的影响,并利用慢应变速率拉伸方法对比研究两种不同扭杆弹簧用钢的氢脆敏感性。结果发现,N1钢由于添加硅、钼等抗回火软化元素,使得N1钢在较高的300℃温度回火时还能保持一定的抗拉强度,N1钢有大量细小的ε-碳化物析出,使得屈服强度增加,屈强比在0.80以上,45Cr Ni Mo VA钢经180℃低温回火后屈服强度在1 550 MPa左右,屈强比只有0.72;经相同条件充氢后,N1钢的慢拉伸强度下降幅度较小,其试样断口中也没有观察到沿晶断裂特征,N1钢的氢脆敏感性明显低于45Cr Ni Mo VA钢。
[Abstract]:The microstructure of new type 40Si2Ni2Cr Mo V steel (code N1) and existing 45Cr Ni Mo VA steel for torsion bar spring and its influence on mechanical properties were studied by SEM,TEM,XRD, chemical phase analysis and other methods. The hydrogen embrittlement sensitivity of two different torsion bar spring steels was studied by slow strain rate tensile method. The results show that due to the addition of anti-tempering softening elements such as silicon and molybdenum, N1 steel can maintain a certain tensile strength at a higher tempering temperature of 300 鈩，
本文编号：2469106
[Abstract]:The microstructure of new type 40Si2Ni2Cr Mo V steel (code N1) and existing 45Cr Ni Mo VA steel for torsion bar spring and its influence on mechanical properties were studied by SEM,TEM,XRD, chemical phase analysis and other methods. The hydrogen embrittlement sensitivity of two different torsion bar spring steels was studied by slow strain rate tensile method. The results show that due to the addition of anti-tempering softening elements such as silicon and molybdenum, N1 steel can maintain a certain tensile strength at a higher tempering temperature of 300 鈩，
本文编号：2469106
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