焊管2024，Vol.47Issue(8)：36-43,8.DOI:10.19291/j.cnki.1001-3938.2024.08.006
TC4平板三道焊缝搭接等离子堆焊的数值模拟
Numerical Simulation of Triple Weld Overlap in TC4 Plate Plasma Surfacing Welding
摘要
Abstract
Using ABAQUS finite element analysis software and a temperature displacement coupled simulation calculation unit,the numerical simulations were conducted on overlap of triple weld in TC4 plate plasma surfacing welding.The temperature field distribution patterns,stress field,and plastic deformation of the welding model were studied under weld overlap.The results show that the front of the double ellipsoidal heat source are dense isotherms and the rear are more extensive and sparse elliptical isotherms.The formed weld will reduce the peak temperature of the heat source center when welding a new weld,and the peak temperature of the heat source center of subsequent welding welds will tend to stabilize.The increase in temperature during post welding will eliminate some welding residual stresses in formed weld,but the welding residual stresses generated during the formation of the last weld cannot be eliminated without the intervention of other new weld or external effects.During the welding process,the stress near the weld is relatively small and exhibits shrinkage stress.The further away from the heat source,the greater the stress,resulting in expansion stress.The welding residual stress may be caused by the huge temperature difference between welding and cooling,and gradually concentrates at the eight top corners of the substrate during the cooling process.The maximum welding deformation occurs at the tail end of the first weld,mostly concentrated in the weld and surrounding areas,and there is almost no deformation in the base material area.关键词
TC4钛合金/温度场/应力场/焊缝搭接/数值模拟Key words
TC4 titanium alloy/temperature field/stress field/weld overlap/numerical simulation分类
矿业与冶金引用本文复制引用
张浩楠,赵斌..TC4平板三道焊缝搭接等离子堆焊的数值模拟[J].焊管,2024,47(8):36-43,8.基金项目
甘肃省科技计划项目"钛合金表面高能微弧火花改性层物相、Ra与摩擦性能调控技术研究"(项目编号22YF7GA138) （项目编号22YF7GA138）
甘肃省教育厅产业支撑计划项目"钛合金花键/齿轮表面耐磨减磨一体化涂层制备技术开发及其产业化"(项目编号2022CYZC-31). （项目编号2022CYZC-31）
