摘要
随着电流辅助加工广泛运用于塑性加工过程中,在冷轧过程中对轧件施加脉冲电流可以降低轧件的变形抗力,提高其成形性能。使用SAE1010低碳钢薄板为实验对象,通过对比不同电流密度下电场辅助冷轧与冷轧后薄板的力学性能和微观组织等,探究脉冲电流对SAE1010低碳钢薄板冷轧变形的影响机制。研究结果表明:与冷轧相比,在合适的电流密度下脉冲电流辅助冷轧能够最大程度提高SAE1010低碳钢薄板的抗拉强度与延伸率。在2.0A/mm2电流密度下,电致塑性效应中的非热效应占主导地位,晶粒不断细化,且分布趋于均匀化,位错不断积累促进了亚晶界取向角的增加,试样力学性能显著提升。该研究有助于提高低碳钢薄板加工精度,对后续的其它参数优化奠定一定的理论基础。
As current assisted machining is widely used in plastic machining,applying pulse current to rolled parts during cold rolling can reduce the deformation resistance and improve the formability of rolled parts.The effect of pulsed current on the defor⁃mation of SAE1010 low carbon steel strip in cold rolling was investigated by comparing the mechanical properties and microstruc⁃ture of the strip under different current densities.The results show that compared with cold rolling,pulsed current assisted cold rolling can increase the tensile strength and elongation of SAE1010 low carbon steel strip at a suitable current density.At the cur⁃rent density of 2.0A/mm2,the non-thermal effect in the electroplastic effect is dominant,the grains are continuously refined,and the distribution tends to be uniform,and the continuous accumulation of dislocation promotes the increase of the subgrain bound⁃ary orientation Angle,and the mechanical properties of the samples are significantly improved.The research is helpful to improve the machining precision of low carbon steel thin strip and lay a theoretical foundation for the optimization of other parameters.
作者
孙超
张明
王强
SUN Chao;ZHANG Ming;WANG Qiang(School of Architecture,Xinxiang Polytechnic,He’nan Xinxiang 453000,China;School of Mechanical and Power Engineering,He’nan Polytechnic University,He’nan Jiaozuo 454000,China;Luoyang Huaguan Gear Co.,Ltd.,He’nan Luoyang 450000,China)
出处
《机械设计与制造》
北大核心
2025年第7期164-167,共4页
Machinery Design & Manufacture
基金
河南省高等学校重点科研项目(22A470005)。
关键词
低碳钢
冷轧变形
脉冲电流
电致塑性效应
Low Carbon Steel
Cold Rolling Deformation
Pulse Current
Electroplastic Effect
