Effect of self-shield flux-cored wire laser-MAG arc hybrid heat source surfacing parameters on bead penetration and depth-to-width ratio

自保护药芯焊丝激光-MAG电弧复合热源堆焊工艺参数对焊道熔深和深宽比的影响 Effect of self-shield flux-cored wire laser-MAG arc hybrid heat source surfacing parameters on bead penetration and depth-to-width ratio 王清曌 WANG Qingzhao 1 2 first-author 徐亦楠 XU Yinan 3 杨淼森 YANG Miaosen 2 林晓辉 LIN Xiaohui 4 刘孔丰 LIU Kongfeng 4 上海三一重机股份有限公司 上海三一重机股份有限公司 SANY Heavy Industry Co., Ltd. SANY Heavy Industry Co., Ltd. 上海电机学院 上海电机学院 Shanghai DianJi University Shanghai DianJi University 哈尔滨威尔焊接有限责任公司 哈尔滨威尔焊接有限责任公司 Harbin Well Welding Co., Ltd. Harbin Well Welding Co., Ltd. 哈尔滨焊接研究院有限公司黑龙江哈 哈尔滨焊接研究院有限公司黑龙江哈 Harbin Welding Institute Limited Company Harbin Welding Institute Limited Company 以自主开发设计的低镍含氮奥氏体不锈钢自保护药芯焊丝为研究对象,研究了激光-MAG电弧复合热源堆焊参数对焊道熔深和深宽比的影响。研究结果表明:复合热源堆焊过程中,激光功率、堆焊电流和电弧电压对熔深和深宽比的影响显著,且其影响规律与光丝位置密切相关;改变光丝间距可以调节熔深和深宽比,进而对稀释率产生影响;激光前置和光丝间距DLA<0 mm更有利于降低熔深和深宽比。堆焊工艺参数不同,主导熔深和深宽比的机制不同,DLA<0 mm、激光功率<2.0 kW、电流>160 A、电压<28 V时,电弧主导熔深和深宽比;反之,激光主导熔深和深宽比。 Taking the self-developed and designed low-nickel nitrogenous austenitic stainless steel self-shielded fluxcored wire as study object, the effect of laser-MAG arc hybrid heat source surfacing parameters on bead penetration and depth-to-width ratio were studied. The results show that the laser power, overlaying current and arc voltage have significant effects on the penetration and depth-to-width ratio during the hybrid heat source surfacing, and the effect law is closely related to the laser-arc position; changing the laser-arc distance can adjust the penetration and depth-to-width ratio, and then affects the dilution rate; laser front and DLA（laser-arc distance）<0 mm are more beneficial to reduce the penetration and depth-to-width ratio. The dominant mechanism of penetration and depth-to-width ratio differs with different surfacing parameters. When DLA <0 mm, laser power <2.0 kW, current >160 A and voltage <28 V, the arc dominates the penetration and depth-to-width ratio; conversely, the laser dominates the penetration and depth-to-width ratio. 自保护 激光堆焊 复合热源 堆焊工艺 熔深 self-shield laser surfacing hybrid heat source surfacing process penetration TG44 2022-03-08 12 51