Transactions of Materials and Heat Treatment

Title：Research and numerical simulation on cold heading process of SCM435 alloy steel joint

Authors： Chen Yongqiang Chen Yu Yang Qun

Unit： School of Mechanical Engineering Wuhu Institute of Technology School of Mechanical Engineering Anhui Polytechnic University

KeyWords： SCM435 alloy steel multi-station cold heading joint constitutive relationship critical damage model metal flow forming load

ClassificationCode：TG376.3

year,vol(issue):pagenumber：2022,47(11):28-35

Abstract：

A SCM435 alloy steel joint adopts the production mode of “hot upsetting + slot milling”, which has complicated process, low production efficiency and unstable product quality. In view of this problem, a multi-station cold heading process with more stable product quality and suitable for batch processing was proposed to replace it. Based on the uniaxial tensile test, the constitutive relationship and critical damage model of SCM435 alloy steel were established by finite element software Deform-3D, and the continuous cold heading process of each station for alloy steel joint was dynamically simulated. Then, the potential defects were predicted from the perspectives of metal flow law, forming plumpness, forming load change and damage value analysis, and the feasibility of the process was verified. The results show that the six-station cold heading process scheme for the alloy steel joint is feasible, the parts in each station are well formed without folding and cracking defects, the metal flow is reasonable, the forming load distribution is uniform, and the maximum damage value is less than the damage threshold of the material. Finally, the trial production is conducted by the multi-station cold heading machine, and the alloy steel joint that meets the requirements is obtained.

Funds：

安徽省级质量工程项目（2019xfzx03）

作者简介：陈永强（1982-），男，硕士，副教授，E-mail：chenyq198206@163.com；通信作者：杨群（1982-），男，硕士，讲师，E-mail：yangqun@whit.edu.cn

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