Modeling of Heat Affected Zone in Multipass GMAW Surfacing S235 Steel Element

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• 作者：Jerzy Winczek ; ^{winczek@imipkm.pcz.czest.pl" class="auth_mail" title="E-mail the corresponding author}
• 关键词：multipass welding ; temperature field ; phase transformation ; GMA
• 刊名：Procedia Engineering
• 出版年：2016
• 出版时间：2016
• 年：2016
• 卷：136
• 期：Complete
• 页码：108-113
• 全文大小：875 K

文摘

The paper presents the model of heat affected zone in a steel element during multipass Gas Metal Arc Weld surfacing. The temperature field is described analytically assuming a volumetric model of heat source and a semi-infinite body model of the surfacing workpiece. The solution takes into consideration the heating during overlaying subsequent weld beads and self-cooling of already padded areas. The critical temperatures A₁ and A₃ are used to determine partial and full austenitic transformation zones, while the temperature of solidus is used to determine the fusion line. Kinetics of phase transformations during cooling is determined on the basis of TTT-welding diagram. In description of phase transformations progress the J-M-A-K law for diffusive transformations, and the K-M law for martensitic transformation are used. The results of calculations are presented in the form of temperature and volume phase fraction distributions.