Macrosegregation and Porosity Formation Mechanism of Laser Welded Joints of 316L/Q345 Dissimilar SteelChinese Full Text English Full Text (MT)

Zhou Dong;Wang Xiaojun;Yin Yan;Zhang Ruihua;Yang Jian;State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, University,Lanzhou, Gansu of Technology;China Iron ＆ Steel Research Institute Group;Hardware Knife Cut Industrial Technology Research Institute of Yangjiang;

Abstract: Taking 316 L/Q345 dissimilar steel laser welded joints as the research object, a bubble generation process model under keyhole instability conditions was established. It was concluded that the main reason for the formation of porosity were the retention of the bubble in the convective mixing zone and the adsorption of the solidifing interface on the bubble. The results of thermodynamic calculation showed that the change of surface free energy ΔGs of the solid-liquid interface attached by bubbles... More

Keywords：

laser welding; welding pores; macrosegregation; pool convection;

DOI：
10.14128/j.cnki.al.20204006.1052
Series：
(I) Electronic Technology ＆ Information Science; (B) Chemistry/ Metallurgy/ Environment/ Mine Industry
Subject：
Metal Science and Metal Technics
Classification Code：
TG456.7

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