Optimization of short-circuit transition parameters of Q235B steel GMAW based on orthogonal gray relational analysis  

作　　者：陈昌荣 唐宝林 叶宇杰 练国富 黄旭 Chen Changrong;Tang Baolin;Ye Yujie;Lian Guofu;Huang Xu(Fujian Key Laboratory of Intelligent Machining Technology and Equipment,Fujian University of Technology,Fuzhou,350118,China;School of Mechanical and Automotive Engineering,Fujian University of Technology,Fuzhou,350118,China;School of Materials Science and Engineering,Fujian University of Technology,Fuzhou,350118,China)

机构地区：[1]Fujian Key Laboratory of Intelligent Machining Technology and Equipment,Fujian University of Technology,Fuzhou,350118,China [2]School of Mechanical and Automotive Engineering,Fujian University of Technology,Fuzhou,350118,China [3]School of Materials Science and Engineering,Fujian University of Technology,Fuzhou,350118,China

出　　处：《China Welding》2024年第2期39-49,共11页中国焊接（英文版）

基　　金：supported by Major Special Projects of Science and Technology in Fujian Province,(Grant No.2020HZ03018);Natural Science Foundation of Fujian Province(Grant No.2020J01873).

摘　　要：In gas metal arc welding(GMAW)process,the short-circuit transition was the most typical transition observed in molten metal droplets.This paper used orthogonal tests to explore the coupling effect law of welding process parameters on the quality of weld forming under short-circuit transition,the design of 3 factors and 3 levels of a total of 9 groups of orthogonal tests,welding current,welding voltage,welding speed as input parameters:effective area ratio,humps,actual linear power density,aspect ratio,Vickers hardness as output paramet-ers(response targets).Using range analysis and trend charts,we can visually depict the relationship between input parameters and a single output parameter,ultimately determining the optimal process parameters that impact the single output index.Then combined with gray the-ory to transform the three response targets into a single gray relational grade(GRG)for analysis,the optimal combination of the weld mor-phology parameters as follows:welding current 100 A,welding voltage 25 V,welding speed 30 cm/min.Finally,validation experiments were conducted,and the results showed that the error between the gray relational grade and the predicted value was 2.74%.It was observed that the effective area ratio of the response target significantly improved,validating the reliability of the orthogonal gray relational method.

关 键 词：short-circuit transition orthogonal test gray relational forming quality 

分 类 号：TG457.11[金属学及工艺—焊接]