| 万亮,蒋烨倩,娄东阁,李伟,马凤仓,张柯.过时效温度对1500双相钢氢脆敏感性的影响[J].有色金属材料与工程,2025,46(1):98-105. |
| 过时效温度对1500双相钢氢脆敏感性的影响 |
| Effect of over-ageing temperature on hydrogen embrittlement susceptibility of 1500 dual-phase steels |
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| DOI：10.13258/j.cnki.nmme.20240311003 |
| 中文关键词: 1500双相钢 过时效温度 氢陷阱 氢脆敏感性 |
| 英文关键词:1500 dual-phase steel over-ageing temperature hydrogen trap hydrogen embrittlement susceptibility |
| 基金项目:国家自然科学基金资助项目（51971148） |
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| 摘要点击次数: 7 |
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| 中文摘要: |
| 对经过850 ℃连续退火处理的C-Mn-Si系1500双相（double-phase，DP）钢进行了不同温度的过时效处理。利用电化学充氢和慢应变速率拉伸实验研究了过时效温度、充氢电流密度和充氢时间对1500DP钢的氢脆敏感性的影响。利用光学显微镜和扫描电子显微镜对1500DP钢的微观组织和充氢断口形貌进行了表征。实验结果表明： 在过时效温度从240 ℃升高到300 ℃时，1500DP钢的抗拉强度和屈服强度均减小，伸长率先减小后增大；随着过时效温度的升高，氢脆敏感性减弱，其中过时效温度为300 ℃时减弱的幅度最为显著。随着充氢电流密度的增大和充氢时间的延长，1500DP钢中氢的质量分数显著增加，氢脆敏感性也增强。 |
| 英文摘要: |
| The over-aging treatment of the C-Mn-Si system 1500 dual-phase (DP) steel annealed at 850 ℃ has been carried out at different temperatures. The effects of over-ageing temperature, hydrogen charging current density and hydrogen charging time on the hydrogen embrittlement susceptibility of 1500DP steel were investigated using electrochemical hydrogen charging and slow strain rate tensile experiments. The microstructures and hydrogen fracture morphologies of 1500DP steel were characterized by optical microscope and scanning electron microscope. The experimental results show that the tensile strength and yield strength of 1500DP steel decrease, and the elongation firstly decreases and then increases, when the over-aging temperature increases from 240 ℃ to 300 ℃. The hydrogen embrittlement susceptibility decreases with the increase of over-aging temperature, the decrease is most significant when the over-ageing temperature is 300 ℃. With the increase of hydrogen charging current densities and the extension of hydrogen charging time, the mass fraction of hydrogen in 1500DP steel increases significantly, and the hydrogen embrittlement susceptibility is also enhanced. |
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