An experimental study on the control and significance of zinc porosity in arc welding of zinc coated steel in automotive chassis

作     者：Arenillas, Carlota Bell, Mike Ravelo, José A. 

作者机构：Manager of innovation projects in the Advanced Technology and Applications department at Gestamp Chassis Boroa Spain Development engineer in the Advanced Technologies and Applications department at Gestamp Chassis Newton Aycliffe United Kingdom Welding process engineer at Gestamp Chassis Boroa Spain 

出 版 物：《Welding and Cutting》 (Weld. Cutt.)

年 卷 期：2022年第21卷第2期

页      面：98-103页

核心收录：

学科分类：0202[经济学-应用经济学] 1202[管理学-工商管理] 080503[工学-材料加工工程] 1201[管理学-管理科学与工程(可授管理学、工学学位)] 0806[工学-冶金工程] 0817[工学-化学工程与技术] 08[工学] 0837[工学-安全科学与工程] 0805[工学-材料科学与工程（可授工学、理学学位）] 0802[工学-机械工程] 0702[理学-物理学] 080201[工学-机械制造及其自动化] 

主　　题：Porosity 

摘      要：A continuing automotive industry trend towards in-creased use of galvanized steel in chassis structures has generated big challenges regarding the in-production assessment and control of zinc porosity defects in arc welds. The objective of this study was to investigate, in a systematic way, whether it is possible to eliminate or significantly reduce the amount of zinc porosity in MAG welds by optimization of weld parameters or by use of alternative MAG process variants and weld wires. A review of the traditional weld quality sampling methods found that they struggle to represent the true extent or severity of zinc porosity in welds. Our experiment results concluded that alternative MAG weld variants, special parameters or novel weld wires could not eliminate or very significantly reduce zinc porosity content, compared to cur-rent standard practice. However, we have shown that the significance of zinc pore defects on fatigue durability is actually very low so we suggest it may be more cost effective to adjust safety factors, in critical welds only, in the design analysis process. © 2022, DVS Media GmbH. All rights reserved.