Temperature Distribution Analysis and Hardness Measurement into TIG Welded Stainless Steel Plates

The present work deals with the analysis of temperature distribution and hardness measurement in 310 stainless steel joined by TIG welding process. There are total four welded plates which have been taken under study. In all the four pair of plates, different current values are taken. They are kept in gradually increasing manner, i.e., 290 Amp, 300 Amp, 310 Amp, and 320 Amp whereas the voltage is kept constant as 25 Volts in each condition. All the welded joints have been cooled in atmospheric air. The temperature distribution is assessed from weld center line to 25 mm away from it by using theoretical method. In addition, Rockwell hardness test has been conducted to measure the hardness values at various positions in welded samples. The prediction of heat affected zone (HAZ) has also been done in this work.