拉伸变形与氢渗透动态协同作用下<strong>X65</strong>钢的氢扩散行为研究

doi:10.11902/1005.4537.2026.012

中国腐蚀与防护学报

2026, Vol. 46

Issue (5): 1619-1626 CSTR: 32134.14.1005.4537.2026.012 DOI: 10.11902/1005.4537.2026.012

研究报告

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拉伸变形与氢渗透动态协同作用下X65钢的氢扩散行为研究

党桂铭, 陈锴, 吕良, 杜一帆, 高浩然, 郑树启(

)

中国石油大学(北京)新能源与材料学院北京 102249

Hydrogen Diffusion Behavior in X65 Steel Under Dynamic Synergistic Effect of Tensile Deformation and Hydrogen Permeation

DANG Guiming, CHEN Kai, LV Liang, DU Yifan, GAO Haoran, ZHENG Shuqi(

)

College of New Energy and Materials, China University of Petroleum (Beijing), Beijing 102249, China

引用本文:

党桂铭, 陈锴, 吕良, 杜一帆, 高浩然, 郑树启. 拉伸变形与氢渗透动态协同作用下X65钢的氢扩散行为研究[J]. 中国腐蚀与防护学报, 2026, 46(5): 1619-1626.
Guiming DANG, Kai CHEN, Liang LV, Yifan DU, Haoran GAO, Shuqi ZHENG. Hydrogen Diffusion Behavior in X65 Steel Under Dynamic Synergistic Effect of Tensile Deformation and Hydrogen Permeation[J]. Journal of Chinese Society for Corrosion and protection, 2026, 46(5): 1619-1626.

全文: PDF(10921 KB) HTML

摘要:

通过双电解池与应力腐蚀试验机相结合可对钢试样进行拉伸变形试验的同时对其充氢，如是，分别研究了应变速率和应力集中对X65管线钢氢扩散行为的影响。结果表明，拉伸变形对氢扩散行为的影响与加载应变速率存在依存关系，高应变速率时的塑性变形过程显著抑制氢扩散，而低应变速率时塑性变形过程对氢原子的束缚作用减弱。拉伸变形过程中缺口处的应力集中会驱动氢原子向高应力区富集，它与缺口处的塑性变形协同作用进一步束缚氢从而加剧氢致损伤的进程，应力集中程度越大这种缺口束缚效应越强；对比发现应力集中较小的非缺口区域氢渗透过程受影响较小。

关键词 ： X65管线钢, 氢渗透, 拉伸变形, 应力集中

Abstract：

The hydrogen diffusion behavior in X65 pipeline steel during simultaneously tensile deformation testing and hydrogen permeating for the test sample was assessed via a setup of combined a dual-electrochemical cell and a stress corrosion testing machine. While the effect of strain rate and stress concentration on the hydrogen diffusion was examined respectively. The results indicate that the influence of tensile deformation on hydrogen diffusion is dependent on the applied strain rate. Plastic deformation at high strain rates significantly inhibits hydrogen diffusion, whereas at low strain rates, the restraining effect of the plastic deformation on hydrogen atoms is weakened. Stress concentration at the notch during tensile deformation drives the accumulation of hydrogen atoms toward the high-stress region. The synergistic effect of this accumulation and the plastic deformation at the notch, may further enhance the hydrogen trapping, thereby accelerating the process of hydrogen-induced damage. The magnitude of this notch trapping effect strengthens with the increasing stress concentration. In contrast, regions with minimal stress concentration, such as non-notched areas, exhibit a comparatively minor influence on the hydrogen permeation process.

Key words： X65 pipeline steel hydrogen permeation tensile deformation stress concentration

收稿日期: 2026-01-12 32134.14.1005.4537.2026.012

ZTFLH:

TG174

通讯作者: 郑树启，E-mail：zhengsq09@163.com，研究方向为纯氢/掺氢天然气输送管道氢脆行为

Corresponding author: ZHENG Shuqi, E-mail: zhengsq09@163.com

作者简介: 党桂铭，男，1999年生，硕士生

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https://www.jcscp.org/CN/10.11902/1005.4537.2026.012 或 https://www.jcscp.org/CN/Y2026/V46/I5/1619

图1 X65钢的金相组织图

图2 板状试样尺寸示意图

图3 双电解池与应力腐蚀试验机组合测试示意图

图4 X65钢光滑板状试样在不同应变速率条件下载荷与背景电流随时间的变化曲线

图5 X65钢光滑板状试样在不同应变速率条件下载荷与氢扩散电流随时间的变化曲线

图6 X65钢在不同应变速率条件下渗透拉伸的应力应变曲线

表1 X65钢在不同应变速率条件下渗透拉伸的力学性能参数

图7 不同应力集中系数板状试样拉伸时载荷与氢扩散电流随时间的变化曲线

图8 不同应力集中系数板状试样渗透拉伸后的断口形貌

图9 Kt = 2.0板状试样非缺口中心区域渗透拉伸时载荷与氢扩散电流随时间的变化曲线

图10 Kt = 2.0板状试样不同条件下拉伸的载荷位移曲线

图11 Kt = 2.0板状试样渗透拉伸断口形貌

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