摘要
为了研究CO2气体保护焊强制对流对焊接变形的影响,通过分析多种换热边界条件,分别确定了适用于自然对流和有强制对流效果的气体保护焊的对流辐射边界条件计算公式,计算得出综合换热系数。在此基础上对手工焊和CO2焊焊接应力应变进行计算分析。结果表明,CO2焊保护气体形成的强制对流而形成的冷却环境是其降低焊接变形的重要因素。
The influences of forced convection on the welding deformation of CO2 gas shielded arc welding were investigated. The formula of the combined coefficient, including convection coefficient and radiation coefficient, was obtained by analyzing two convection boundary conditions, which considers natmal convection and force convection, seperately. Based on these two conditions, the deformation of butt welding plate with 3 mm was simulated. The stimulation results show that compared with manual welding, the force convection boundary condition of CO2 gas shielded arc welding is a critical factor to form less deformation.
出处
《热加工工艺》
CSCD
北大核心
2011年第21期130-133,共4页
Hot Working Technology
关键词
焊接变形
CO2气体保护焊
强制对流
welding deformation
CO2 gas shielded arc welding
force convection
