贝氏体车轮钢的氢脆敏感性
Hydrogen Embrittlement Sensitivity of a Bainite Railway Wheel Steel
摘 要
用电解充氢试验方法研究了可扩散氢浓度对贝氏体车轮钢慢拉伸性能及氢致滞后开裂性能的影响, 并与普通珠光体-铁素体车轮钢进行了对比。结果表明, 在相同慢拉伸条件下, 贝氏体车轮钢材料的塑性损失高于珠光体-铁素体车轮钢; 在相同的充氢条件下, 贝氏体车轮钢氢致开裂门槛应力强度因子相对于断裂韧性值的降低程度明显高于珠光体-铁素体车轮钢, 具有较高的氢致开裂敏感性。
车轮钢
氢脆
氢致滞后开裂
bainite
wheel steel
hydrogen embrittlement
hydrogen induced delayed cracking
Abstract
The influence of diffusible hydrogen concentration (C0) on the plasticity and hydrogen induced delayed cracking of a bainite railway wheel steel was investigated by means of the slow strain rate test (SSRT) specimens and wedge open loading (WOL) specimens charged in a solution respectively. The results showed that the plasticity loss of the bainite wheel steel was larger than that of the pearlite-ferrite CL60 wheel steel. The threshold stress intensity factor of hydrogen induced delayed cracking KIH of the bainitie wheel steel decreased with the increase of diffusible hydrogen concentration. The KIH of the bainite wheel steel was much lower than that of the CL60 wheel steel when C0≥1.6×10-6, though the fracture toughness KIC of the bainite wheel steel was much higher than that of the CL60 wheel steel.
中图分类号 TG172.9
所属栏目 试验研究
基金项目 国家自然科学基金资助项目(50901010); 高等学校博士学科点专项科研基金资助项目(200800081006)
收稿日期 2010/12/30
修改稿日期 2011/4/1
网络出版日期
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备注任学冲, 副研究员, 博士,
引用该论文: REN Xue-chong,JIN Ying,WANG Sha-sha,SU Yan-jing,QIAO Li-jie,ZHANG Ming-ru,CUI Yin-hui. Hydrogen Embrittlement Sensitivity of a Bainite Railway Wheel Steel[J]. Corrosion & Protection, 2011, 32(11): 863
被引情况:
【1】周艳,张洁, "高强度螺栓断裂原因分析",理化检验－物理分册 50, 526-527(2014)
【2】张海兵,马力,闫永贵,程文华,袁亚民, "17-4PH不锈钢的析氢行为",腐蚀与防护 37, 317-320(2016)
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参考文献
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【6】Ren X C, Chu W Y, Su Y J, et al. Effects of atomic hydrogen and flacking on mechanical properties of wheel steel[J]. Metallurgical and Materials Transactions, 2007, 38(A):1004-1011.
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