焊剂带约束电弧超窄间隙焊接工艺实验
Processing Experiment of Ultra-narrow Gap Welding with Constrained Arc by Flux Strips
朱 亮， 冯志鹏， 李宗志
点击：3482次 下载：0次
作者单位：(兰州理工大学 甘肃省有色金属新材料省部共建国家重点实验室， 甘肃 兰州 730050)
中文关键字：焊剂带约束电弧； 超窄间隙焊接； 焊接工艺参数
英文关键字： arc constrained by flux strips; ultra-narrow gap welding; welding parameters
中文摘要：焊剂带约束电弧的行为已有基本的认识，用于超窄间隙焊接有明显的优势。在间隙宽度为4 mm、钢板厚度为30 mm的I形坡口中，进行多层单道焊剂带约束电弧超窄间隙焊接试验。整个焊接接头要通过根焊、填充焊和盖面焊来完成，通过试验分析得到各焊道所对应的焊接工艺参数。这种超窄间隙焊接方法线能量低，约为0.6 kJ/mm；所得到焊接接头的热影响区宽度窄，约为1.3 mm；采用常规的CO2气保焊焊丝H08Mn2Si，超窄间隙焊缝硬度比CO2气保焊焊缝硬度提高60%。
英文摘要：The behaviors of arc constrained by flux strips were basically understood, which has obvious advantages for ultra-narrow gap welding. With 4 mm wide square groove, 30 mm thick steel plate, a series of multi-layer and single-pass ultra-narrow gap welding experiments were conducted. The welded joint was completed by root welding, filling welding and cover welding, their welding parameters were obtained from the experimental analysis. The results show that the energy input of this processing is low (about 0.6 kJ/mm). The width of heat-affected zone of welded joint was narrow (about 1.3 mm). Using H08Mn2Si wire of carbon-dioxide arc welding, the hardness in weld bead can increase about 60% by adopting ultra-narrow gap welding compared with that of adopting carbon-dioxide arc welding.