Numerical Simulation Of Fusion Welding Process In Dissimilar Steel

Welding is a complex physical chemistry process. With the development of computer science and technology, numerical simulation of welding phenomena has become a hot research topic domestically and abroad and has also been put into wide use.Finite element method (FEM) is used here to simulate the temperature field and the residual stress field in the dissimilar fusion-welding joint of G102 (12Cr2MoWVTiB) and SUS304 (OCrl9Ni9) that are often used in power boilers. The distribution rule of temperature and stress are also discussed here. The large FEM analysis software ANSYS is used as a method here to simulate the temperature and stress field of this kind of joint in different situations on the basis of finite element theory and fundamental equation. By comparing the results, an optimization project about the welding process of this kind of joint is presented here in the purpose of reducing the residual stress. Some experiments were carried out to verify the simulation results.