摘要
为了探究不同焊接工艺参数对6061铝合金薄板脉冲MIG焊输入能量及焊缝显微组织的影响,利用数字化多功能焊接电源对6061铝合金薄板进行了单强脉冲、单弱脉冲和双脉冲堆焊试验,并进行焊缝的形貌、金相组织分析和硬度检测。结果表明,提高焊接速度和调节低能量脉冲基值时间可以降低热输入,低热输入下焊缝冷却速度较大。通过增大基值时间来降低热输入的方式能够细化焊缝组织的晶粒,且增大焊接速度可以提高焊接接头的硬度。
In order to investigate the influence of different welding process parameters on the input energy of pulse MIG welding and microstructure of welding joint,digital multifunction welding power source was used to carry out single strong pulse,single weak pulse and double-pulse surfacing welding tests on 6061 aluminum alloy sheets.The weld morphology and metallographic structure were analyzed,and the hardness test were performed.The results show that increasing the welding speed and adjusting the base time of low energy pulses can reduce the heat input,and the weld cooling speed is higher under low heat input.Reducing the heat input by increasing the base time can refine the grains of weld structure,and increasing the welding speed can increase the hardness of the welded joint.
作者
李林
薛家祥
武威
徐志伟
LI lin;XUE Jia-xiang;WU Wei;XU Zhi-wei(School of Mechanical and Electrical Engineering,Guangdong Baiyun University,Guangzhou 510450,China;School of Mechanical&Automotive Engineering,South China University of Technology,Guangzhou 510640,China)
出处
《轻合金加工技术》
CAS
北大核心
2019年第8期66-71,共6页
Light Alloy Fabrication Technology
基金
广东省创新强校工程青年创新人才类项目(项目编号:CXQXQN187)
关键词
低热输入
脉冲焊接
晶粒细化
硬度
low heat input
pulse welding
grain refinement
hardness
