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

WANG Qingzhao; XU Yinan; YANG Miaosen; LIN Xiaohui; LIU Kongfeng

doi:10.7512/j.issn.1001-2303.2021.12.23

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Effect of self-shield flux-cored wire laser-MAG arc hybrid heat source surfacing parameters on bead penetration and depth-to-width ratio
Vol. 51, Issue 12, Pages: 116-120(2021)
Published：2021
DOI： 10.7512/j.issn.1001-2303.2021.12.23
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DOI：

WANG Qingzhao, XU Yinan, YANG Miaosen, et al. Effect of self-shield flux-cored wire laser-MAG arc hybrid heat source surfacing parameters on bead penetration and depth-to-width ratio[J]. Eletric Welding Machine2021, 51(12): 116-120. DOI： 10.7512/j.issn.1001-2303.2021.12.23.

摘要

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。

Abstract

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.