Research on porosity of underwater wet FCAW duplex stainless steel  

作　　者：Shi Yonghua Hu Yu Li Zhihui Lin Shuiqiang Shen Xiaoqin Yi Yaoyong  Yi Jianglong 石永华;胡玉;李志辉;林水强;沈晓勤;易耀勇;易江龙(School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou, 510640 Guangdong Welding Institute （China-Ukraine E. O. Paton Institute of Welding）, Guangzhou 510650)

机构地区：[1]School of Mechanical and Automotive Engineering,South China University of Technology,Guangzhou,510640 [2]Guangdong Welding Institute(China-Ukraine E.O.Paton Institute of Welding),Guangzhou 510650

出　　处：《China Welding》2016年第2期27-33,共7页中国焊接（英文版）

基　　金：the National Natural Science Foundation of China(Grant No.51374111&51175185);Science and Technology Plan Project of Guangdong Province(Grant No.2015B050502005)for financial support

摘　　要：To study the influence laws of welding parameters on weld porosity, underwater wet flux-cored arc welding （ FCAW） duplex stainless steel S32101 was carried out in a hyperbaric chamber, and the second-order multiple regression equation was established. The interactive effects of welding parameters on the porosity were analyzed by the three dimensional response surfaces and the contour plots. The results present that the interaction effect between water depth and voltage on the porosity is the most significant. Theoretically, a non-pores weld bead can be gained by reasonably matching these parameters with water depth less than 10 m. Always, the weld porosity reaches its peak value with a 7 mm/s welding speed.To study the influence laws of welding parameters on weld porosity, underwater wet flux-cored arc welding （ FCAW） duplex stainless steel S32101 was carried out in a hyperbaric chamber, and the second-order multiple regression equation was established. The interactive effects of welding parameters on the porosity were analyzed by the three dimensional response surfaces and the contour plots. The results present that the interaction effect between water depth and voltage on the porosity is the most significant. Theoretically, a non-pores weld bead can be gained by reasonably matching these parameters with water depth less than 10 m. Always, the weld porosity reaches its peak value with a 7 mm/s welding speed.

关 键 词：underwater wet welding POROSITY flux-cored arc welding response surface methodology duplex stainless steel 

分 类 号：TG456.5[金属学及工艺—焊接]