工程条件下气保护药芯焊丝焊接参数及焊缝波纹的选择  

Selection of welding parameters and weld ripple of gas shielded flux core wire under engineering condition

作　　者：孙咸[1] 

机构地区：[1]太原理工大学焊接材料研究所,山西太原030024

出　　处：《电焊机》2015年第5期73-78,共6页Electric Welding Machine

摘　　要：探讨了工程应用中气保护药芯焊丝熔滴过渡形态、主要焊接参数,以及焊缝表面波纹的选择方法。结果表明,大电流、强规范施工中,钛型气保护药芯焊丝的主流过渡形态是非轴向排斥滴状过渡,短路过渡不应成为该工艺的主要过渡形态。焊丝焊接参数选择的"合于使用"原则,强调适合于施工现场使用的焊接参数特征。先电流后电压的参数调节顺序,能顺利获得既定熔滴过渡形态和满意工艺质量。因熔池移动速度与熔滴给进速度不能同步,产生波间距离而形成的焊波,能有效控制气孔(压坑)产生,为该类焊丝焊接性改善提供一个新方向。The selection methods of droplet transfer form,main welding paranaeters and weld ripple are discussed. The resuhs show that the main transfer forms of titanium type gas shielded flux cored wire with large current and strong specification wehling are non- axial exclusion transition, and the short circuiting metal transfer should not become the main transfer form of the welding process. The ＂fitness for purpose＂ principle for selecting welding parameters emphasizes the welding parameter features shouht be suitable h）r construction site. And the parameter adjustment sequence with first the welding cun＇ent then the are voltage can smoothly obtain established droplet transfer forms and satisfactory process quality. The welding wave distance,i.e, weld ripple is formed because of the non-synchronization between molten pool movement speed and drop feed rate,and it can effectively control porosity （press hole） fonrmtion, and provide a new direction for improving the wire weldability.

关 键 词：焊接参数 熔滴过渡形态 焊缝波纹 气保护药芯焊丝 工程条件 选择 

分 类 号：TG422.3[金属学及工艺—焊接]