马魁1，麻永林1，李美玲2，陈重毅1，陆恒昌1

( 1．内蒙古科技大学材料与冶金学院，内蒙古包头014010; 2．内蒙古大学物理科学与技术学院，内蒙古呼和浩特010020)

关键词: Monel － 400 合金; 冷金属; 过渡焊; 数值模拟

中图分类号: TG409; O242 文献标识码: A

摘要: 为获得中厚板CMT 残余应力分布规律，进一步了解CMT 焊接的优越性，基于ANSYS 有限元分析软件，以体生热率做热源，以“生死单元技术”模拟焊缝的生成，对MONEL － 400 平板CMT 焊接进行数值模拟．通过分析模拟结果得到CMT 焊接温度场和应力场; 通过分析残余应力数据发现CMT 对焊件的纵向应力影响较大，该方向在焊缝中心产生的最大残余应力达261 MPa; 通过与普通对接焊模拟结果对比发现，CMT 可减小焊接塑性变形区的宽度，焊件性能更优越．

Numerical simulation Research of CMT for Monel-400 Alloy medium plate based on ANSYS software

MA Kui1，MA Yong-lin1，LI Mei-ling2，CHEN Zhong-yi1，LU Heng-chang1

( 1． Material and Metallurgy School，Inner Mongolia University of Science and Technology，Boutou 014010，china;2． College of Physics and Technology，Inner Monglia University，Huhehaote 010020，China)

Key words: monel- 400 Alloy; CMT; numerical simulation

Abstract: Numerical simulation research of CMT for monel － 400 alloy was established by combining the body heat rate and element birth and death technology on ANSYS software in order to obtain medium plate residual stress distribution of CMT． The temperature fields and stress fields were obtained by the analysis of the simulation calculation using heat generation rate as a welding heat source;the results showed that CMT had a great influence on the longitudinal stress，with 261 MPa of residual stress produced in length direction;compared with the ordinary butt welding CMT can get the superior performance of the weldment．