<strong>EPS</strong>处理对<strong>QStE700TM</strong>钢氢脆敏感性影响

doi:10.11902/1005.4537.2023.171

中国腐蚀与防护学报

2024, Vol. 44

Issue (3): 691-699 CSTR: 32134.14.1005.4537.2023.171 DOI: 10.11902/1005.4537.2023.171

研究报告

本期目录 | 过刊浏览

EPS处理对QStE700TM钢氢脆敏感性影响

徐云峰¹, 王少峰², 何龙², 刘冬³, 黄峰¹(

), 刘静¹

1.武汉科技大学省部共建耐火材料与冶金国家重点实验室武汉 430081
2.杭州金固环保设备科技有限公司杭州 311400
3.宝钢股份中央研究院武钢有限技术中心武汉 430080

Effect of Eco Pickled Surface Treatment on Hydrogen Embrittlement Sensitivity of QStE700TM Steel

XU Yunfeng¹, WANG Shaofeng², HE Long², LIU Dong³, HUANG Feng¹(

), LIU Jing¹

1. State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, China
2. Hangzhou Jingu Environmental Protection Equipment And Technology Co. Ltd., Hangzhou 311400, China
3. R & D Center of Wuhan Iron & Steel Co. Ltd., Baosteel Central Research Institute, Wuhan 430080, China

引用本文:

徐云峰, 王少峰, 何龙, 刘冬, 黄峰, 刘静. EPS处理对QStE700TM钢氢脆敏感性影响[J]. 中国腐蚀与防护学报, 2024, 44(3): 691-699.
Yunfeng XU, Shaofeng WANG, Long HE, Dong LIU, Feng HUANG, Jing LIU. Effect of Eco Pickled Surface Treatment on Hydrogen Embrittlement Sensitivity of QStE700TM Steel[J]. Journal of Chinese Society for Corrosion and protection, 2024, 44(3): 691-699.

全文: PDF(7240 KB) HTML

摘要:

采用慢应变速率拉伸(SSRT)和双电解池电化学氢渗透等手段，研究了湿法抛丸(EPS)、酸洗和干式抛丸3种表面处理工艺对QStE700TM高强结构钢氢脆敏感性及氢渗透动力学参数的影响规律；并结合不同处理工艺钢板试样表面氧化铁皮残留、硬度和残余应力变化，探讨了EPS工艺对QStE700TM钢氢脆敏感性影响机理。结果表明，EPS工艺处理QStE700TM钢试样的氢脆敏感性仅为8.1%，相较于酸洗和干式抛丸工艺分别降低了12.7%和20.5%。这与EPS工艺处理钢板表面氧化铁皮残留少，残余应力为-150~-300 MPa范围内的压应力有关。另外，EPS处理钢试样因更小的氢扩散通量(J_∞L)和有效氢扩散系数(D_app)及更大的滞后时间(t_L)和阴极侧次表面氢浓度(c₀)，表现出比干式抛丸工艺处理钢试样更好的阻碍氢扩散性能，进而表现出更低的氢脆敏感性。综合考虑，EPS工艺是一种全新、可靠的和低碳环保的高强钢表面除鳞工艺。

关键词 ： QStE700TM钢, EPS处理, 氢脆敏感性

Abstract：

The effect of surface treatments of Eco Pickled Surface (EPS), picking and blasting on the hydrogen embrittlement (HE) susceptibility and hydrogen permeation kinetic of QStE700TM high-strength structural steel was comparatively assessed via slow strain rate tension (SSRT) and double electrolytic cell electrochemical hydrogen permeation device. The influence of surface treatment processes on the HE susceptibility of QStE700TM steel was discussed in terms of the variations of residual oxide scale, hardness and residual stress on the surface of steel plates subjected to different surface treatments. The results showed that the HE susceptibility of QStE700TM steel treated by EPS technique was only 8.1%, which is 12.7% and 20.5% lower than that by pickling and blasting, respectively. It would be related to the less residual oxide scale and the existed residual compressive stress on the surface of the steel plate treated by EPS. In addition, smaller hydrogen diffusion flux (J_∞L) and effective hydrogen diffusion coefficient (D_app) and larger lag time (t_L) and cathode side subsurface hydrogen concentration (c₀), should be responsible for the lower HE susceptibility of the steel samples treated by EPS. Take all factors into account, the EPS is a new, reliable, low-carbon and environmentally friendly surface descaling technology for high-strength steel.

Key words： QStE700TM steel EPS treatment hydrogen embrittlement susceptibility

收稿日期: 2023-05-22 32134.14.1005.4537.2023.171

ZTFLH:

TG178

基金资助:国家自然科学基金(U21A20113);湖北省自然科学基金科技创新群体(2021CFA023)

通讯作者: 黄峰，E-mail: huangfeng@wust.edu.cn，研究方向为高性能钢铁材料及服役安全

Corresponding author: HUANG Feng, E-mail: huangfeng@wust.edu.cn

作者简介: 徐云峰，男，1999年生，博士生

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图1 QStE700TM高强结构钢板显微组织照片

图2 拉伸性能测试试样

表1 不同表面处理QStE700TM板材力学性能及要求

图3 氢脆敏感性测试试样

图4 QStE700TM钢经不同表面处理后的表面形貌及EDS分析

图5 QStE700TM钢经不同表面处理后的截面形貌及EDS分析

图6 不同表面处理后QStE700TM钢板不同方向残余应力

图7 不同表面处理后QStE700TM钢的洛氏硬度

图8 经不同表面工艺处理后充氢与未充氢QStE700TM钢的应力-位移曲线

表2 经不同表面工艺处理后充氢与未充氢QStE700TM钢的拉伸性能

图9 经不同表面处理工艺后QStE700TM钢的氢渗透曲线

表3 经不同表面处理工艺后QStE 700TM钢的氢渗透动力学参数

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