碱性气体保护药芯焊丝工艺质量的选择与控制

介绍了碱性气体保护药芯焊丝的冶金特点、电弧行为及工艺质量,探讨了焊丝工艺质量选用原则和控制原理。结果表明,典型碱性焊丝熔渣色泽赭色泛黄、玻璃状薄渣,渣中SiO2很少,熔滴不增氧,不被细化。该类焊丝的电弧形态属于活动、连续型。焊丝熔滴过渡的基本形态是非轴向排斥滴状过渡。可以保证焊丝熔敷金属低的含氧、含氢量及较少的有害杂质,保证焊缝组织大量的针状铁素体,因而获得了优异的力学性能。焊丝工艺质量指标选择的＂合于使用＂原则,强调产品特征或用户要求。提出了减小焊接飞溅的技术路线,和保证获得优异、稳定冲击吸收能量的焊缝韧性控制原理。

Selection and control of usability quality of gas shielded flux-cored wire with basic slag

The metallurgical characteristics, arc behavior and usability quality of gas shielded flux - cored wire with basic slag were introduced, and the selection principles and control mechanisms of wire usability quality were discussed. The results show that the color of typical basic slag is sienna with yellow, thin glassy slag, SiO2 content in the slag is little, and the droplet can not increase the oxygen and can not be refined. The arc form of wire is active and continuous, and the basic metal transfer forms with flux-cored wire is non-axial exclusion droplet transition. The low oxygen and hydrogen content, and less harmful impurities and a large number of acieular ferrite in wire deposited metal can be guaranteed, thus obtaining excellent mechanical properties. The ＂suitable for use＂ principle selected flux cored wire usability quality indicators emphasizes the product features or user requirements. The technical line of reducing welding spatter and control principle of weld toughness to obtain excellent and stable impact absorption energy are proposed.