Cr/N合金化对孪晶诱发塑性钢氢脆行为的影响

doi:10.13251/j.issn.0254-6051.2025.12.036

金属热处理 ›› 2025, Vol. 50 ›› Issue (12): 232-238.DOI: 10.13251/j.issn.0254-6051.2025.12.036

Cr/N合金化对孪晶诱发塑性钢氢脆行为的影响

黄玖龙¹, 葛银磊¹, 刘帅¹, 周景一¹, 徐海¹, 袁泽博², 冯运莉¹

1.华北理工大学冶金与能源学院, 河北唐山 063210;
2.首钢京唐钢铁联合有限责任公司制造部, 河北唐山 063210

收稿日期:2025-07-08 修回日期:2025-10-17 发布日期:2026-01-06
通讯作者: 刘帅,副教授,博士,E-mail:sliu_ysu@163.com
作者简介:黄玖龙(1999—),男,硕士研究生,主要研究方向为先进高强钢力学性能,E-mail:13595666146@163.com。
基金资助:
河北省创新能力提升计划项目(24461002D);河北中央引导地方资助项目(236Z1014G);唐山市科技局资助项目(23130206E);河北省教育厅科技项目(QN2025168);华北理工大学重点科研项目(ZD-ST-202310-23)

Effects of Cr/N alloying on hydrogen embrittlement behavior of twinning-induced plasticity steels

Huang Jiulong¹, Ge Yinlei¹, Liu Shuai¹, Zhou Jingyi¹, Xu Hai¹, Yuan Zebo², Feng Yunli¹

1. College of Metallurgy and Energy, North China University and Technology, Tangshan Hebei 063210, China;
2. Manufacturing Department, Shougang Jingtang United Iron and Steel Co., Ltd., Tangshan Hebei 063210, China

Received:2025-07-08 Revised:2025-10-17 Published:2026-01-06

摘要/Abstract

摘要： 以Fe-18Mn-0.6C和Fe-18Mn-0.6C-7Cr-0.2N 孪晶诱发塑性(Twinning-induced plasticity,TWIP)钢为研究对象,利用动态充氢慢拉伸试验、升温脱氢分析及OM、XRD、EBSD等检测手段,研究了Cr、N元素对TWIP钢氢脆行为的影响。结果表明:Cr、N的添加能够细化Fe-18Mn-0.6C TWIP钢的晶粒尺寸,通过减少单位体积晶界上H原子的数量,降低应力集中,有效提高TWIP钢的抗氢脆性能;Cr、N的加入能够增加TWIP钢层错能,抑制形变孪晶的产生,减少一次孪晶与二次孪晶的交互作用,减少应力集中以及H原子的聚集,抑制氢致裂纹的萌生;Fe-18Mn-0.6C钢的断口形貌表现出准解理断裂特征,主裂纹大且深,沿孪晶扩展呈现穿晶断裂。Fe-18Mn-0.6C-7Cr-0.2N 钢断口形貌的准解理断裂特征减少,主裂纹小而浅呈现沿晶断裂。

关键词: 孪晶诱发塑性钢, 氢脆, Cr/N合金化, 断口形貌

Abstract: Effects of Cr and N elements on hydrogen embrittlement behavior of twinning-induced plasticity(TWIP) steels Fe-18Mn-0.6C and Fe-18Mn-0.6C-7Cr-0.2N were studied by means of dynamic hydrogen charging slow tensile test, thermal desorption analysis (TDA), as well as characterization techniques including optical microscope(OM), X-ray diffractometer(XRD) and electron backscatter diffraction (EBSD). The results show that the addition of Cr and N can refine the grain size of the Fe-18Mn-0.6C TWIP steel. By reducing the number of H atoms at grain boundaries per unit volume, stress concentration alleviates and the hydrogen embrittlement resistance of the TWIP steel effectively improves. The addition of Cr and N can increase the stacking fault energy of the TWIP steel, inhibit the formation of deformation twins, reduce the interaction between primary twins and secondary twins, decrease stress concentration and H atom aggregation, thus suppressing the initiation of hydrogen-induced cracks. The fracture morphology of the Fe-18Mn-0.6C steel exhibits quasi-cleavage fracture characteristics, with large and deep main cracks extending along twins, showing transgranular fracture. The Fe-18Mn-0.6C-7Cr-0.2N steel has reduced quasi-cleavage fracture characteristics in its fracture morphology, with small and shallow main cracks, showing intergranular fracture.

Key words: twinning-induced plasticity steel, hydrogen embrittlement, Cr/N alloying, fracture morphology

中图分类号:

黄玖龙, 葛银磊, 刘帅, 周景一, 徐海, 袁泽博, 冯运莉. Cr/N合金化对孪晶诱发塑性钢氢脆行为的影响[J]. 金属热处理, 2025, 50(12): 232-238.

Huang Jiulong, Ge Yinlei, Liu Shuai, Zhou Jingyi, Xu Hai, Yuan Zebo, Feng Yunli. Effects of Cr/N alloying on hydrogen embrittlement behavior of twinning-induced plasticity steels[J]. Heat Treatment of Metals, 2025, 50(12): 232-238.

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Cr/N合金化对孪晶诱发塑性钢氢脆行为的影响

Effects of Cr/N alloying on hydrogen embrittlement behavior of twinning-induced plasticity steels

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