Relationship between Hydrogen Embrittlement Sensitivity and Hydrogen Content for 40CrNiMoA High Strength Steel
摘 要
测试了40CrNiMoA高强钢在湿空气环境中的应力腐蚀性能,采用扫描电子显微镜(SEM)、俄歇电子能谱(AES)和拉伸冲击试验等方法,研究试样断裂形貌及其脱氢前后的力学性能。结果表明:40CrNiMoA高强钢在湿空气中发生了沿晶应力腐蚀开裂,断口形貌特征为氢脆;俄歇电子能谱结果提示晶界偏聚不是发生氢脆的主要原因;脱氢处理后,抗拉强度和屈服强度明显下降,断面收缩率明显上升,冲击功也有所上升。
Abstract
Stress corrosion performance of 40CrNiMoA high strength steel was studied in wet air environment. The fracture morphology and mechanical properties of the samples before and after dehydrogenation were investigated by scanning electron microscopy (SEM), Auger electron spectroscopy (AES), tensile test and impact test. The results show that intergranular stress corrosion cracking occurred in the wet air environment, and the fracture morphology was hydrogen embrittlement. The results of Auger electron spectroscopy showed that grain boundary segregation was not the main reason of hydrogen embrittlement. After the process of dehydrogenation, the tensile strength and yield strength decreased significantly, and the section shrinkage increased significantly, and the impact of work has also increased.
中图分类号 TG172.5 DOI 10.11973/fsyfh-201707014
所属栏目 应用技术
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收稿日期 2017/5/1
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引用该论文: DING Youyuan,ZHANG Wei,LI Chengtao,LIU Yan,XU Ke,FANG Kewei,XUE Fei. Relationship between Hydrogen Embrittlement Sensitivity and Hydrogen Content for 40CrNiMoA High Strength Steel[J]. Corrosion & Protection, 2017, 38(7): 547
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参考文献
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【3】刘昌奎,李运菊,陶春虎,等. 紧固螺栓开裂原因分析[J]. 机械工程材料,2008,32(4):70-73.
【4】云江,申常江,雷小荣. 40CrNi2MoA钢大锻件的调质热处理[J]. 金属热处理,2004,29(12):68-70.
【5】刘孝红,王毛球,时捷,等. 热处理对25CrNi2MoVNb钢氢脆敏感性的影响[J]. 金属热处理,2009,34(12):9-13.
【6】CHEN T C,CHEN S T,KAI W. Effect of the degree temper embrittlement on the susceptibility of hydrogen embrittlement[J]. Transactions ISIJ,1992,22(9):285-291.
【7】PAN C,SU Y J,CHU W Y,et al. Hydrogen embrittlement of weld metal of austenitic stainless steels[J]. Corrosion Science,2002,44:1983-1993.
【8】张永健,惠卫军,项金钟,等. 晶粒尺寸对42CrMoVNb钢超高周疲劳性能的影响[J]. 金属学报,2009(7):880-886.
【9】XIAO G Z,DI H S. Delayed fracture resistance and mechanical properties of 30MnSi high strength steel[J]. J Iron Steel Res,2009,16:49.
【10】武光宗,王毛球,王春芳,等. 回火马氏体钢中氢的扩散行为及其氢脆敏感性[J]. 材料热处理学报,2012,33(1):136-140.
【11】AHMAD S A,RYDER D A,DAVIES T J. On the embrittlement of fracture toughness specimens of two high strength steels[J]. Eng Frac Mech,1975(7):357.
【12】LI H L,GAO K W,QIAO L J,et al. Strength effect in stress corrosion cracking of high strength steel in aqueous solution[J]. Corrosion,2001,57:295.
【13】TSAY L W,LU H L,CHEN C. The effect of grain size and ageing on hydrogen embrittlement of a maraging steel[J]. Corr Sci,2008,50:2506.
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