Numerical analysis of heat transfer process for double sided tungsten inert gas-metal inert gas weld pool.

Double sided arc welding is a new type of technology developed in recent years. Many experiments show that this technology has great advantages over single arc welding for the joining of intermediate thickness stainless steel and aluminium alloy base metals. In the present work, a three-dimensional transient numerical model is created to reveal the heat transfer process for a double sided tungsten inert gas (TIG)-metal inert gas (MIG) weld pool from the viewpoint of heat transfer literature and hydrodynamics. Considering of the features of the model, effective calculation software using finite element technology is adopted. The temperature fields in the weld pool for double sided TIG-MIG welding are successfully calculated; in addition, the configuration of the weld pool is also calculated. Comparisons show that the calculated results agree approximately with the experimentally measured results. [ABSTRACT FROM AUTHOR]