Research on multi-objective optimization of GMAW welding of DH36 steel  

作　　者：Jiang Jibin Zhou Jingxin Chen Changrong Yu Xiwei Lian Guofu Gao Xianfeng 江吉彬;周井鑫;陈昌荣;俞希伟;练国富;高险峰(School of Mechanical and Automotive Engineering,Fujian University of Technology,Fuzhou 350118,China;Fujian FuchuanYifan new energy equipment manufacturing Co.,Ltd.,Zhangzhou 363211,China)

机构地区：[1]School of Mechanical and Automotive Engineering,Fujian University of Technology,Fuzhou 350118,China [2]Fujian FuchuanYifan new energy equipment manufacturing Co.,Ltd.,Zhangzhou 363211,China

出　　处：《China Welding》2021年第2期25-34,共10页中国焊接（英文版）

基　　金：Natural Science Foundation of Fujian Province(Grant No.2020J01873);Technology Major Project of Fujian Province(Grant No.2020H03018).

摘　　要：Weld bead morphology plays an important role in welding procedure specification and welding process planning.In order to obtain the quantitative relationship between process parameters and weld morphology of DH36 marine steel plate,grey correlation method was used to study multiple morphology characteristics simultaneously.Eighteen experimental runs were proposed according to orthogonal method.With grey correlation theory,three response objectives,aspect ratio,depth of penetration and weld were transformed into a single grey correlation grade(GRG).The process parameters were quantitatively correlated to the GRG value and optimized with the target of maximum aspect ratio,minimum depth of penetration and maximum weld area.The results show that the optimized weld bead morphology is better than other weld bead morphology.The relative error of the predicted GRG with respect to the actual value is 5.06%,which further verifies the accuracy of the established model.The microstructure and hardness analysis suggests that the optimized welded joint has obtained required mechanical properties.The research outcomes provide a theoretical basis for multi-objective optimization of arc welding morphology in practical applications.

关 键 词：DH36 steel gas metal arc welding orthogonal design grey correlation method weld bead morphology 

分 类 号：TG444.74[金属学及工艺—焊接]