喷丸诱导组织改变对低合金钢S355氢脆敏感性的影响

doi:10.13251/j.issn.0254-6051.2026.02.033

金属热处理 ›› 2026, Vol. 51 ›› Issue (2): 225-232.DOI: 10.13251/j.issn.0254-6051.2026.02.033

喷丸诱导组织改变对低合金钢S355氢脆敏感性的影响

宁鹭娜¹, 丁文红^1,2, 丁洪元³, 孙裕满¹, 李永山¹, 陈壮³, 王晨旭³

1.武汉科技大学材料学部, 湖北武汉 430081;
2.武汉科技大学省部共建耐火材料与冶金国家重点实验室, 湖北武汉 430081;
3.中冶武勘工程技术有限公司, 湖北武汉 430080

收稿日期:2025-09-17 修回日期:2025-12-08 发布日期:2026-03-05
通讯作者: 丁文红,教授,博士,E-mail: dingwh_wust@163.com
作者简介:宁鹭娜(2001—),女,硕士研究生,主要研究方向为低合金钢的氢脆,E-mail: ningln2@163.com。
基金资助:
湖北省揭榜挂帅项目(2024BEB003);湖北省战略科技人才培育专项(2024DJA018);武汉市自然科学基金特区项目(2024040701010052)

Effect of shot peening induced microstructure evolution on hydrogen embrittlement sensitivity of low alloy steel S355

Ning Luna¹, Ding Wenhong^1,2, Ding Hongyuan³, Sun Yuman¹, Li Yongshan¹, Chen Zhuang³, Wang Chenxu³

1. Department of Materials Science and Technology, Wuhan University of Science and Technology, Wuhan Hubei 430081, China;
2. State Key Laboratory of Refractory Materials and Metallurgy, Wuhan University of Science and Technology, Wuhan Hubei 430081, China;
3. MCC Wukan Engineering Technology Co., Ltd., Wuhan Hubei 430080, China

Received:2025-09-17 Revised:2025-12-08 Published:2026-03-05

摘要/Abstract

摘要： 为改善S355钢在临氢环境下的抗氢脆性能,对其进行不同时间(0、30、60、120 s)的喷丸处理,采用双电解池充氢、电子背散射衍射(EBSD)技术和慢应变速率拉伸(SSRT)试验,研究了喷丸诱导的微观组织改变对氢扩散行为和氢脆敏感性的影响。结果表明,喷丸后晶界与晶内碳化物的再分布是提升S355钢抗氢脆性能的关键因素。随着喷丸时间延长,材料内出现位错增殖,使聚集在晶界处的碳化物及珠光体逐步细化,并向晶粒内迁移。晶界碳化物的减少改变了氢在材料内的扩散路径及聚集行为,使S355钢的氢扩散系数由8.51×10^-6 m²/s下降至5.53×10^-6 m²/s;而晶粒内碳化物的弥散析出则增加了氢陷阱的数量,使S355钢的氢脆敏感性指数(I_HE)由49.65%降至9.55%。

关键词: S355钢, 喷丸, 碳化物, 氢扩散, 氢脆敏感性

Abstract: To enhance the anti-hydrogen property of S355 steel in a hydrogen-rich environment, shot peening was carried out for different time (0, 30, 60, 120 s). Effect of shot peening induced microstructure evolution on hydrogen diffusion behavior and hydrogen embrittlement sensitivity was investigated using two-electrode cell hydrogen charging, electron backscatter diffraction (EBSD) technology, and slow strain rate tensile (SSRT) testing. The results indicate that the redistribution of grain boundaries and intragranular carbides after shot peening is a critical factor for improving the anti-hydrogen property of the S355 steel. As the shot peening time increases, the microstructure shows an increase in dislocation density, which causes the carbides and pearlitic phases accumulated at the grain boundaries to be progressively refined and migrate into the grains. The reduction of grain boundary carbides alters the diffusion pathways and aggregation behavior of hydrogen in the material, lowering the hydrogen diffusion coefficient of the S355 steel from 8.51×10^-6 m²/s to 5.53×10^-6 m²/s. Furthermore, the dispersed precipitation of carbides in the grains enhances the number of hydrogen traps, decreasing the hydrogen embrittlement sensitivity index (I_HE) of the steel from 49.65% to 9.55%.

Key words: S355 steel, shot peening, carbide, hydrogen diffusion, hydrogen embrittlement sensitivity

中图分类号:

TG142

宁鹭娜, 丁文红, 丁洪元, 孙裕满, 李永山, 陈壮, 王晨旭. 喷丸诱导组织改变对低合金钢S355氢脆敏感性的影响[J]. 金属热处理, 2026, 51(2): 225-232.

Ning Luna, Ding Wenhong, Ding Hongyuan, Sun Yuman, Li Yongshan, Chen Zhuang, Wang Chenxu. Effect of shot peening induced microstructure evolution on hydrogen embrittlement sensitivity of low alloy steel S355[J]. Heat Treatment of Metals, 2026, 51(2): 225-232.

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喷丸诱导组织改变对低合金钢S355氢脆敏感性的影响

Effect of shot peening induced microstructure evolution on hydrogen embrittlement sensitivity of low alloy steel S355

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