钛型气保护药芯焊丝工艺质量影响因素综述

A Review of Influencing Factors on Process Quality of Titanium Gas Shielded Flux⁃cored Wire

综述了涉及钛型气保护药芯焊丝工艺质量的影响因素。结果表明,合理选用药芯添加物,严格控制熔敷金属中主要强化元素C、Mn、Si的含量,可以改善焊丝熔滴过渡形态,获得焊丝熔敷金属满意的力学性能。在Ar+CO_(2)二元混合保护气体中,随着CO_(2)含量增大,熔滴过渡形态从轴向变为非轴向滴状排斥过渡,接头的抗拉强度几乎没有影响,但熔敷金属的冲击吸收能明显下降。热输入较大时,焊丝工艺性变差;热输入居中时,焊丝工艺性较好。热输入对焊丝熔敷金属韧性的影响出现了对热输入敏感和不敏感两种情况。钛型气保护药芯焊丝工艺质量的三个影响因素控制原理各具特色。

The factors affecting process quality of titanium gas shielded flux-cored wire were reviewed.The results show that reasonable selection of core additives and strict control of content of the main strengthening elements C,Mn and Si in deposited metal can improve the droplet transfer mode of welding wire and obtain satisfactory mechanical properties of the deposited metal of welding wire.In Ar+CO2 binary mixed shielding gas,with the increase of CO2 content,the droplet transfer mode changes from axial to non-axial droplet repulsive transfer,and the tensile strength of the joint has little effect,but the impact absorption energy of the deposited metal decreases obviously.When heat input is relatively high,the usability of welding wire becomes worse,and when the heat input is middle,the usability is more satisfactory;The impact of heat input on the toughness of deposited metal of welding wire may appear in two situations:sensitive to heat input and insensitive to heat input.The control principles of three factors affecting process quality of titanium gas shielded flux-cored wire have their own characteristics.