摘要
选取TI公司开发的MSP430F149单片机为控制核心的MIG焊过程控制系统,研究焊接电流、焊接速度、焊接方向&焊枪角度和钢侧坡口角度等对Q890D钢/6061铝合金焊缝成形的影响,并在优化焊接工艺下分析焊接电流和焊接速度对Q890D钢/6061铝合金MIG焊接头界面区组织和接头力学性能的影响。结果表明:Q890D钢/6061铝合金适宜焊接方向为右焊法,适宜的焊枪角度为10°,适宜的钢侧坡口角度为45°,焊丝位置宜处于钢侧坡口中部,适宜的焊接电流和焊接速度分别为105 A和50 cm/min;不同焊接电流和焊接速度的Q890D钢/6061铝合金MIG焊接头的断裂位置都处于界面区,而MIG焊过程中界面区形成的靠近钢侧的(Fe,Cu)2Al5和靠近铝侧的(Fe,Cu)4Al13相的双层金属间化合物层结构有助于改善焊接质量。
The effects of welding current,welding speed,welding direction&welding torch angle and steel side groove angle on the weld formation of Q890D steel/6061 aluminum alloy were studied,and the effects of welding current and welding speed on the in⁃terface structure and mechanical properties of Q890D steel/6061 aluminum alloy MIG welding joint were analyzed under optimized welding process.The results show that the suitable welding direction of Q890D steel/6061 aluminum alloy is right welding method,the suitable angle of welding torch is 10°,the suitable angle of steel side groove is 45°,and the welding wire position should be in the mid⁃dle of the steel side groove,the suitable welding current and welding speed are 105 A and 50 cm/min respectively;the fracture position of MIG welding joint of Q890D steel/6061 aluminum alloy with different welding current and welding speed is in the interface zone;in MIG welding process,the double⁃layer intermetallic compound layer structure of(Fe,Cu)2Al5 near the steel side and(Fe,Cu)4Al13 near the aluminium side formed in the interfacial zone is helpful to improve the welding quality.
作者
蒋琳
徐忠根
JIANG Lin;XU Zhonggen(College of Mechanical Engineering,Shangqiu Institute of Technology,Shangqiu Henan 476000,China;School of Information and Electronic Engineering,Shangqiu Institute of Technology,Shangqiu Henan 476000,China)
出处
《机床与液压》
北大核心
2021年第4期37-43,共7页
Machine Tool & Hydraulics
基金
国家重点研发计划(2017YFB0305701)。
关键词
Q890D钢/6061铝合金
MIG焊
界面区
微观形貌
接头组织
力学性能
单片机
Q890D steel/6061 aluminum alloy
MIG welding
Interface zone
Micro⁃morphology
Interface structure
Mechani⁃cal properties
Single chip microcomputer
