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以Kirkaldy和Koistinen-Marburger相变模型为基础,建立焊接热影响区相变模型。以Q345E钢平板对接焊为例,用Goldak双椭球功率密度分布热源模型计算焊接热循环,用ABAQUS有限元分析软件对焊接过程中的热影响区的相变进行数值模拟。以相同焊接规范进行焊接试验,利用Image-pro-plus软件进行组织测定。将试验结果与模拟结果进行比较分析,二者吻合良好,证明本焊热影响区相变模型可以准确分析焊接热影响区相变情况,对优化焊接工艺参数、改善焊接接头性能、提高焊接产品质量具有重要指导作用。
Based on Kirkaldy and Koistinen-Marburger phase transition model, a phase transition model of HAZ is established. Taking Q345E steel plate butt welding as an example, the thermal cycle of welding was calculated by Goldak dual ellipsoidal power density distribution heat source model. The phase transformation in the heat affected zone during the welding process was numerically simulated by ABAQUS finite element analysis software. Welding tests were performed with the same welding specifications and tissue measurements were performed using Image-pro-plus software. The experimental results and the simulation results are compared and analyzed. The results agree well with each other. It is proved that the phase change model of the HAZ can accurately analyze the phase transformation of the HAZ, and optimize the welding process parameters, improve the performance of welded joints and improve the quality of welding products Has an important guiding role.