Welding Heat Recycle Simulation FEA Based On Computer

In the course of welding, thermal resource moving along the welding seam, at every point of which temperature varies at any time, all of these phenomena is called welding heat recycle. It is also the circulation which thermal resource heats the basic metal. The transformation of metallurgical texture and the development of stress in the welding seam and its neighborhood lie on metallic chemical constitution and welding heat recycle.Parameters of welding heat recycle mainly include heating maximal temperature, length of staying above phase transition temperature and cooling velocity. Any of these parameters will affect metallic performance after welding. Therefore, test and calculation of welding heat recycle are very important to analyze the change of welding joint texture and performance, reasons of welding defects. By improving welding procedure and process of welding heat circulation, we can improve the quality of welding products very well.According to welding heat recycle simulated by computer, we can decide the optimal design, technique and welding parameters. From this point of view, based on predecessor's achievement, good software ANSYS and a great many of experiments including Q235 and 16MnR arc surfacing, this article has simulated 2-D and 3-D welding temperature field, brought forward the analytical method of welding heat recycle simulation. The results of simulations are identical with experiments. In the end of this paper, according to welding CCT graph, we can forecast the texture of welding seam.