T形角焊缝接头的坡口角度研究
Groove Angle Research of T-shaped Fillet Welded Joints
徐 坚, 李秀玲
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作者单位：郑州铁路职业技术学院 实验实训中心，河南 郑州 450052
中文关键字：T形角焊缝； 坡口角度； 弯曲试验； 金相组织分析
英文关键字：T-shaped fillet weld； groove angle； bending tests； microstructure analysis
中文摘要：以工程机械常用的Q550高强度钢为母材，采用ER50-6 和MK·G60-1焊丝，对20和30 mm两种板厚的实验材料进行焊接，以T形角焊缝接头形式为研究对象，对不同坡口角度的接头形式进行弯曲试验和金相组织分析。结果表明，坡口角度为25°～35°时，焊缝具有良好的综合力学性能，同时比45°坡口角度的焊缝可减少焊接道数，从而约减少18.5%的焊接工作量。
英文摘要： Q550 high-strength steel was commonly used in hydraulic supports as base material, the test materials with 20 mm and 30 mm thickness was welded using ER50-6 and MK·G60-1 wire. Taking welded joints with T-shaped angle as research object， in view of the different forms of groove-welded joints, the bending experiment and microstructure was analyzed. The results show that, in the condition of groove angle 25°～35°, the weld has good comprehensive mechanical properties. The number of welding pass reduces, and the welding workload can reduce by about 18.5% compared with 45° weld groove.