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通过光学显微镜、扫描电子显微镜(SEM)、拉伸试验机、维氏硬度计等研究脉冲电流处理后10CrNiCu钢显微组织及力学性能的变化,并与传统淬火处理进行对比。结果表明,经脉冲电流处理的10CrNiCu钢,显微组织得到明显细化,并且多相混合,具有良好的综合力学性能。随着脉冲电流密度的增加或作用时间的延长,10CrNiCu钢的显微组织由铁素体+珠光体转变为贝氏体+马氏体的混合组织,力学性能也随之提高。与传统淬火处理相比,脉冲电流处理后10CrNiCu钢具有更高的强度和硬度,且伸长率未降低。
The microstructure and mechanical properties of 10CrNiCu steel after pulsed current treatment were investigated by optical microscope, scanning electron microscope (SEM), tensile tester and Vickers hardness tester. The results were compared with the conventional quenching treatment. The results show that the microstructure of 10CrNiCu steel treated by pulsed current is obviously refined and multiphase mixed with good comprehensive mechanical properties. The microstructure of 10CrNiCu steel changed from ferrite + pearlite to bainite + martensite mixed structure with the increase of pulse current density or action time, and the mechanical properties also increased. Compared with the traditional quenching, 10CrNiCu steel after pulse current treatment has higher strength and hardness, and the elongation is not reduced.