Effects of Amount of Galvanization on Microstructure and Mechanics Properties of Joints Made by Induction-pressure Welding of Low Alloy Steel/5052 Aluminum Alloy

被引：0
|
作者：
Gao K. [1 ,2 ]
Li K. [1 ,2 ]
Gu H. [1 ,2 ]
机构：
[1] School of Automotive and Traffic Engineering, Wuhan University of Science and Technology, Wuhan
[2] Analysis and Testing Center, Wuhan University of Science and Technology, Wuhan
来源：
Zhongguo Jixie Gongcheng/China Mechanical Engineering | 2023年 / 34卷 / 10期
关键词：
amount of galvanization; induction-pressure welding(IPW); mechanics property; microstructure;
D O I：
10.3969/j.issn.1004-132X.2023.10.012
中图分类号：
学科分类号：
摘要：
Three lap joints of low-alloy steel plates with different galvanizations and aluminum alloys were prepared using IPW technique. The effects of different amounts of galvanization on the interfacial connection state, microstructure characteristics and mechanics properties of the joints were studied. The results show that the connection interfaces of the three different amount of galvanization joints are straighter and the connection quality is good. The middle interface area of the joint consists of Fe2Al5 near the steel side and FeAl3 near the aluminum side. By comparing the microstructure and morphology of the joints with three different amount of galvanization, it is found that Zn element may improve the initial wetting mechanism at the steel-aluminum interfaces, strengthen the connection effect between aluminum alloy and low-alloy steel, and improve the mechanics properties of the lap joints. When welding with a low alloy steel plate with a galvanization of 140 g/m2, a significant zinc-rich zone defect is found at the weld toe position, resulting in a sharp drop in the shear properties of the joints. The shear properties of lap joints of low-alloy steel sheets and aluminum alloys show a trend of increasing and then decreasing with the amount of galvanization, and it is important to select a moderate thickness of galvanization to improve the mechanics properties of the joints. © 2023 China Mechanical Engineering Magazine Office. All rights reserved.
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页码：1220 / 1229
页数：9
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