摘要
考察了直流脉冲电流对 H0 Cr1 7Ni6Mn3钢丝拉拔过程中表面摩擦磨损行为的影响 ,并采用扫描电子显微镜观察分析了拉拔后钢丝的表面形貌 .结果表明 :在拉拔过程中施加高密度脉冲电流可使钢丝表面的裂纹尺寸减小、裂纹和其它缺陷的数量减少 ,并在其表面出现平行于拉拔方向的犁沟状条纹 ;施加高密度脉冲电流改变了钢丝的表面磨损机理 ,并显著增加拉拔钢丝的延伸率 ,降低拉拔钢丝的显微硬度 .脉冲电流的频率愈高 。
ABSTRACT The influence of high density direct current pulses on the friction and wear behavior of H0Cr17Ni6Mn3 steel wires in drawing deformation was investigated. The surface morphologies of the drawn steel wires were observed with a scanning electron microscope so as to compare the deformation and wear mechanisms of the steel wires under two different drawing conditions. It was found that the wear mechanism of the wires was changed by the application of current pulse in the drawing deformation. The size and the number of microcracks on the surface of as-drawn wires were obviously decreased while the width and the depth of the grooves on the surface increased with the increment of the frequency of current pulses employed. The microhardness of the as-drawn wires was reduced and their tensibility was increased in the presence of the current pulses as well.
出处
《摩擦学学报》
EI
CAS
CSCD
北大核心
2002年第3期202-205,共4页
Tribology
基金
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