摘要
针对2.5 mm+3 mm的碳钢材料T形接头的激光填丝焊,采用ER50-G焊丝作为填充金属,对激光功率、光斑位置、离焦量、焊接速度和送丝速度等参数对焊缝成形的影响进行工艺试验,并对焊接接头的金相组织和硬度进行分析。结果表明:获得了优化的工艺参数,采用该参数焊接的接头成型良好,且硬化、软化倾向不明显;要保证该T形接头焊透,除需要保证一定熔深外,还需要有一定的熔宽;激光功率、光斑尺寸及光斑位置对焊缝质量影响较大。试验结果为激光填丝焊工艺的车体结构工程化应用提供技术支持。
According to T Joint of large tilt angle laser penetration welding of carbon steel plate with 2. 5 mm and 3 mm in thickness and filler wire of ER50-G,the shape and properties of T joint were systematically studied. It was investigated that the effects of welding parameters such as welding speed,wire feeding speed,laser power,the location of laser on the plate and the defocusing distance on weld formation. The microstructures and hardness of T joint were analyzed and tested. The results show that the optimized welding parameters were acquired,the welded joints welded with the optimized welding parameters are free of defects and meet the requirements. The studies will support the application of the laser welding with filler wire on the body structure of high speed train.
出处
《焊接》
北大核心
2017年第12期56-60,共5页
Welding & Joining
关键词
激光填丝焊
T形接头
大角度
碳钢
laser welding with filler wire
T joint
large tilt angle
carbon steel
