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

作　　者：万亮 蒋烨倩 娄东阁 李伟 马凤仓[1] 李伟[3] 张柯 WAN Liang;JIANG Yeqian;LOU Dongge;LI Wei;MA Fengcang;LI Wei;ZHANG Ke(School of Materials and Chemistry,University of Shanghai for Science and Technology,Shanghai 200093,China;CHINALCO Luoyang Copper Processing Co.,Ltd.,Luoyang 471039,Henan,China;Automotive Steel Research Institute of Research Institute of Baoshan Iron&Steel Co.,Ltd.,Shanghai 201900,China)

机构地区：[1]上海理工大学材料与化学学院,上海200093 [2]中铝洛阳铜加工有限公司,河南洛阳471039 [3]宝山钢铁股份有限公司研究院汽车用钢研究所,上海201900

出　　处：《有色金属材料与工程》2025年第1期98-105,共8页Nonferrous Metal Materials and Engineering

基　　金：国家自然科学基金资助项目(51971148)。

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。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.

关 键 词：1500双相钢 过时效温度 氢陷阱 氢脆敏感性 

分 类 号：TG166.2[金属学及工艺—热处理]