Welding Simulation of TIG Welding by Using Finite Element Technique
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Abstract
This research presents a simulation of the thermal state during TIG welding in cold work (SKD 11), which is widely used in the tool and die industry. After welding, thermal distribution and cooling rate affect material properties and tool life. Experimental sets, including finite element analysis (FEA) and experiments, and bead-on-plate welding were simulated by the FE program MSC. Marc Mentat 2008, 3D model, specimen size 50x80x6 mm, analysis is based on transient, Gaussian disc model is used for moving heat source, material properties depend on temperature, welding parameters are current 3 levels 65, 100 and 135 A, voltage 10.5 V, welding speed 1, 3 and 5 mm/s. And then, an estimated cooling rate from simulation led to an evaluation of Vicker hardness by the CCT diagram at the weld metal, base metal, and heat-affected zone (HAZ). As the results show, it can be concluded that the hardness values of the FEA simulation agree with the experiment results.
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