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进行了不锈钢焊接凝固裂纹温度场分析与数值模拟。首先将电弧看成辐射状对称并呈高斯分布的二维热流作用于工件表面，解决了电弧产热问题；其次，通过液淬 法测试金属的固相分数 随温度变化率，得到了凝固潜热释放率；最后采用增大热传导系数的方法，考虑 了熔池内流体流动对整 个温度场的影响。在此基础上，建立了二维焊接凝固裂纹温度场计算模型。此外，采用有限元方法计算了二维焊接凝固裂纹温度场，并研究了焊接规范参数及材料的热物理性能对温度场的影响，为进一步进行焊缝金属凝固裂纹应力应变场的分析奠定了基础。
The temperature field analysis and numerical simulation of stainless steel welding solidification crack were carried out. Firstly, the arc is treated as a radial symmetrical and Gaussian-distributed two-dimensional heat flux on the surface of the workpiece to solve the problem of heat generation in the arc. Secondly, the solidification latent heat release is obtained by measuring the solid fraction of metal with the rate of temperature change by liquid quenching Finally, the method of increasing heat transfer coefficient was used to consider the influence of fluid flow in the weld pool on the whole temperature field. On this basis, the calculation model of two-dimensional welding solidification crack temperature field is established. In addition, the finite element method was used to calculate the temperature field of two-dimensional welding solidification crack, and the influence of welding parameters and thermal physical properties on the temperature field was studied, which laid the foundation for further analysis of stress and strain field of solidified crack in weld metal. .