摘要
为探究焊接模式和电流对铝合金焊缝成形的影响,采用双脉冲、高速双脉冲、双脉冲增强三种焊接模式匹配70A、80A、90A电流进行单道焊接.实验发现:当电流为90A时,焊缝效果较好,双脉冲模式焊缝内部的晶粒组织排列更加规则,枝晶生长得更加完整.由此可知,焊接模式和电流对铝合金焊缝的外部形态和内部微观组织产生影响;双脉冲模式匹配90 A的电流时,焊接质量优于高速双脉冲、双脉冲增强两种模式,可为焊接模式的选择提供一定的参考.
To investigate the influence of welding modes and current on the formation of aluminum alloy weld seams,three welding modes—dual-pulse,high-speed dual-pulse,and dual-pulse enhanced—were employed,matched with current values of 70 A,80 A,and 90 A for single-pass welding.Experimental findings revealed that the weld seam exhibited better results when the current was set to 90 A.In the dual-pulse mode,the internal grain structure of the weld seam was more regularly arranged,and dendritic growth appeared more complete.Therefore,the welding modes and current have an impact on both the external morphology and internal microstructure of aluminum alloy weld seams.When the dual-pulse mode is matched with a current of 90A,the welding quality is superior to the high-speed dual-pulse and dual-pulse enhanced modes.This provides certain reference for the selection of welding modes.
作者
姚屏
许敏
林茜
黄韵怡
王晓军
YAO Ping;XU Min;LIN Qian;HUANG Yunyi;WANG Xiaojun(School of Training,Guangdong Polytechnic Normal University,Guangzhou Guangdong 510665;School of Intelligent manufacturing,Guangzhou Institute of Science and Technology,Guangzhou Guangdong 510540;School of Mechatronic Engineering,Guangdong Polytechnic Normal University,Guangzhou Guangdong 510665;Industrial Training Center,Guangdong Polytechnic Normal University,Guangzhou Guangdong 510665)
出处
《广东技术师范大学学报》
2023年第6期1-7,共7页
Journal of Guangdong Polytechnic Normal University
基金
国家自然科学基金(51805099)
广东省教育厅普通高校重点科研项目(2020ZDZX2019,2022ZDZX3008)
2021年省科技创新专项资金“大专项+任务清单”项目(SDZX2021020)。
关键词
双脉冲弧焊
铝合金焊缝
焊接模式
电流匹配
焊缝成形
微观组织
dual-pulse arc welding
aluminum alloy welded joint
welding mode
current matching
weld seam formation
microstructure
作者简介
姚屏,博士,广东技术师范大学教授;许敏,广东技术师范大学2021级硕士研究生。
