Finite element methot analysis of heat transfer in welding with different current of DD11 and DD13 steels

A lot of steel materials are used in many fields from industry to our daily life. When using these materials need for joining operation. The welding method is one of the most preferred joining operations. Increases the raw material costs about use of metal-based materials in the industrial field. As the raw material is gradually gaining value, most industrial enterprises aim to reduce the number of scrap products. There may be various reasons why the products are scrap. If these reasons are detected before production, product costs will be improved. The problems will be determined by analysing the studies before the production when the problems are solved the product costs will be improved. Quality production is aimed. The general problem of welded joints of metal-based materials is the high heat input to the material and distortion of the material about this heat input. It is known that the heat transfer during welding in the light of the results obtained with the welding methods applied in literature screening adversely affects the mechanical and microstructural properties of the material. These effects can also be studied as a result of experimental studies, but there is no possibility to do experimental work in the industry at all times. Therefore, it is possible to estimate the direction and amount of the distortion and residual stresses that will occur during the welded production by the finite element method. In this study, 3 mm thick DD11 and DD13 material, usually in the automotive sector as a wishbone welded joint was made in different flows with the MAG welding method. The heat input resulting from the material was analysed by finite element method. Temperatures measurements of the material were made by total of 12 K type thermocouples. When welding started during the experiment, it was found that the arc temperature was not effective at the end of weld seam. When the welding arc reached the end point, it was seen that the starting point cooled down. Therefore, in the finite element analysis, the weld seam of 100 mm length was divided into 10 equal parts and analysed. İn order to see the stresses during welding, structural analysis was made by using finite element method in the light of the temperatures obtained in the experiment. When the experimental results were compared with the simulation results, it was found to be compatible with each other.