钛合金K-TIG深熔焊热源开发与数值仿真
Development and Numerical Simulation on Heat Source of K-TIG Deep Penetration Welding for Titanium Alloy
李岩 1李艳彪 2刘琪 2杨冰冰 3张璐霞 2吴志生2
作者信息
- 1. 太原科技大学材料科学与工程学院,山西太原 030024;山西电子科技学院智能制造产业学院,山西临汾 041000
- 2. 太原科技大学材料科学与工程学院,山西太原 030024
- 3. 山西电子科技学院智能制造产业学院,山西临汾 041000
- 折叠
摘要
K-TIG是在传统TIG焊基础上,将焊接电流提高到300A甚至更高并配合钨极冷却系统形成"匙孔"效应,最终实现大熔深的焊接工艺方法.K-TIG焊缝熔宽相对于等离子和激光焊接等焊接方法较宽,熔池体积较大.传统的热源模型不适合K-TIG焊热源分布特点,基于SYSWELD仿真平台和钛合金K-TIG焊接实验结果,开发钛合金K-TIG深熔焊数值仿真组合热源模型.结果表明,双椭球热源分配系数取0.75,作用深度取4 mm时,仿真熔池与实际接头横截面相符,正面熔宽为12 mm,且背部熔宽为5 mm.温度热循环曲线和残余应力有限元仿真结果与实验结果基本一致,验证了所建立的K-TIG热源模型的准确性.
Abstract
K-TIG is a welding process based on traditional TIG welding,which increases the welding current to 300 A or even higher value and forms the"keyhole"effect by the feat of tungsten electrode cooling system to achieve the ultimate deep penetration welding.The welding width of K-TIG welding is wider than that of plasma and laser weld,and the weld pool is larger.The traditional heat source model is not suitable for the characteristics of heat source distribution in K-TIG weld.Based on the SYSWELD simulation platform and the experimental results of K-TIG welding for titanium alloy,a combined heat source model for numerical simulation of K-TIG deep penetration welding of titanium alloy was developed.The results show that when the distribution coefficient of double ellipsoidal heat source is 0.75 and the acting depth is 4 mm,the simulation weld pool is consistent with the actual joint cross section,and the front weld width is 12 mm and the back weld width is 5 mm.The finite element simulation results of temperature loop curve and residual stress are basically consistent with the experimental results,verifying the accuracy of the established K-TIG heat source model.
关键词
钛合金/K-TIG/数值模拟/热源开发/组合热源Key words
titanium alloy/K-TIG/numerical simulation/heat source development/combined heat source引用本文复制引用
基金项目
山西省重点研发计划(202102050201001)
Shanxi Basic Research Plan(202203021221149)
Linfen Key Research and Development Plan(2202)
出版年
2024
NETL
NSTL
万方数据