Effects of electrode tip morphology on resistance spot welding quality of DP590 dual-phase steel

被引：40

作者：

Wang, Bin ^{[1
,3
]}

Hua, Lin ^{[1
,2
]}

Wang, Xiaokai ^{[1
,2
,3
]}

Song, Yuke ^{[1
,3
]}

Liu, Yali ^{[1
,3
]}

机构：

[1] Univ Technol, Hubei Key Lab Adv Technol Automot Components Wuha, Wuhan 430070, Peoples R China

[2] Hubei Collaborat Innovat Ctr Automot Components T, Wuhan 430070, Peoples R China

[3] Wuhan Univ Technol, Sch Automot Engn, Wuhan 430070, Peoples R China

来源：

INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY | 2016年 / 83卷 / 9-12期

关键词：

Electrode pitting; Electrode tip diameter enlargement; Electrode tip morphology; Resistance spot welding; Dual-phase steel; LOW-CARBON STEEL; NUGGET FORMATION; FAILURE; PREDICTION; JOINTS; WEAR; LIFE;

D O I：

10.1007/s00170-015-7703-0

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

Electrode pitting (EP) and electrode tip diameter enlargement (ETDE) are the two major representations of electrode wear, which lead to the change of electrode tip morphology and have significant impacts on the resistance spot welding (RSW) quality. In order to analyze the effects of electrode tip morphology on RSW quality of DP590 dual-phase steel, the RSW finite element (FE) model is developed to predict the nugget shape and size, whose reliability is verified by experimental observation. Tensile-shear tests are carried out to illustrate the failure behaviors. Three nugget shapes and two failure modes are obtained from different conditions of electrode tip morphology. The results show that EP morphologies produce incomplete fusion at the center of the workpieces' faying surface, while ETDE morphologies reduce the nugget sizes. Both obvious EP and ETDE morphologies resulted in a decline of lap shear fracture load (LSFL).

引用

页码：1917 / 1926

页数：10

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