【摘要】 本文采用有限元法对非线性焊接温度场进行了分析,提出了局部干法水下焊接温度场计算的数学模型。文中对6毫米钢板的局部干法水下焊接的温度场进行了实例计算,比较了不同焊接条件对熔合区冷却特性的影响。结果表明,增加有效屏蔽半径,采用小功率低焊速配合以及减小底部的导热条件都将延长800～500℃的冷却时间,提高水下焊接接头的质量。分析表明,有限元法是水下焊接传热分析的有效工具,利用该法可以对各种条件下的热过程特征进行分析比较,从而为分析材料的水下司焊性,设计合适的水下焊接装置和合理选择焊接参数提供依据。更多还原

【Abstract】 In this paper,the non-linear welding thermal conduction was analysed by finite element method.The temperature fields in steel with thickness of 6mm during local drying underwater welding were calculated as example.The cooling characteristics by different welding conditions and their influences on cooling time of 800℃～500℃ of welded joints were compared.更多还原