高碳钢丝多道次拉拔及矫直对残余应力的影响-中国材料进展

文章信息/Info

Title:: Effect of Multi-Pass Drawing and Tensile Straightening on the Residual Stress of High-Carbon Steel Wire

作者:: 蔡磊1; 朱建国1; 程亮1; 2; 张帅今2; 唐斌3; （1. 盛利维尔（中国）新材料技术股份有限公司，江苏常州 213000）（2. 江苏理工学院材料工程学院，江苏常州 213001）（3. 西北工业大学凝固技术国家重点实验室，陕西西安 710072）

Author(s):: CAI Lei1; ZHU Jianguo1; CHENG Liang1; 2; ZHANG Shuaijin2; TANG Bin3; （1. Sunnywell (China) New Material Technology Co., Ltd., Changzhou 213000, China) （2. School of Materials Engineeing, Jiangsu University of Technology, Changzhou 213001, China) （3. State key Laboratory of Solicffication Processing, Northwestern Polytechnical University, Xi’an 710072, China)

Keywords:: high-carbon steel wire; draw drawing; numerical simulation; tensile straightening; residual stress

摘要:: 针对T9高碳珠光体钢丝多道次拉拔及后续拉伸矫直过程中的轴向残余应力演变进行分析。首先通过实验测量获得了钢丝盘条在大变形下的应力应变关系，然后基于abaqus有限元软件建立了多道次拉拔过程的数值模型，并结合实验结果验证了模型的可靠性。利用所建立的数值模型进行了8个道次的拉拔仿真，结合塑性流动理论揭示了残余应力形成的演变规律。另外，利用数值仿真研究了钢丝经拉伸矫直后残余应力的变化。结果表明，拉拔后钢丝的轴向残余应力分布很不均匀，表层为正、心部为负；拉拔道次对钢丝残余应力的影响较小，略微提高了残余应力并降低了其均匀性；后续拉伸矫直对残余应力的影响非常显著，06%~1%的拉伸变形即可显著降低残余应力，使其分布更加均匀。

Abstract:: This study was carried out to investigate the evolution of axial residual stress in high-carbon steel wire during multi-pass drawing and the subsequent tensile straightening. Firstly, the stress-strain relationship of the steel rod under severe deformation was obtained by means of tensile experiments. Then a numerical model for multi-pass drawing was constructed based on abaqus finite-element software, which has been verified by comparison with the experimental results. By using the numerical model, an eight-pass drawing process was simulated, and the formation and evolution mechanism of the residual stress has been revealed. After that, the variation of the residual stress after tensile straightening has been studied by numerical simulation. The results showed that, the distribution of the axial residual stress is highly inhomogeneous after drawing, which exhibit positive in the skin region and negative in the center region. The drawing passes had slight effect on the residual stress of the steel wire. In contrast, significant effect was observed after the subsequent tensile straightening. A tensile deformation as small as 0.6%~1% can dramatically reduce the residual stress, resulting a more homogeneous distribution of the residual stress in the wire.