Device and method for high-frequency TIG-assisted double-wire low-current consumable electrode arc material increase of high-nitrogen steel

Abstract

The invention belongs to the field of high-nitrogen steel arc additive manufacturing, and particularly relates to a high-frequency TIG-assisted double-wire low-current consumable electrode arc additive manufacturing device and method for high-nitrogen steel. A double-wire low-current consumable electrode welding gun is used for welding in the vertical direction, and meanwhile a high-frequency TIG welding gun is used for assisting in welding on the side face; two high-nitrogen steel wires in the double-wire low-current consumable electrode welding gun are respectively and independently fed and are fixed on the robot through a wire feeding system; the welding current of the double-wire low-current consumable electrode welding gun is 80-120A, and the frequency of the high-frequency TIG welding gun is 5-15KHz. The problems that the additive high-nitrogen steel is large in splashing, large in number of air holes and the like are solved through double-wire small current; the high-frequency TIG electric arc is used for improving the problems of poor low-current additive forming and the like, and in addition, the stirring effect of the high-frequency effect on a molten pool plays the roles of eliminating air holes and refining crystal grains; the problem that the quality of a formed part is poor due to the fact that traditional consumable electrode arc additive high-nitrogen steel is prone to splashing, multiple in air holes, too much in heat accumulation and the like is effectively solved.

Description

technical field [0001] The invention belongs to the field of high-nitrogen steel arc material addition, and in particular relates to a high-nitrogen steel device and method for high-nitrogen steel assisted by high-frequency TIG-assisted double-wire low-current melting electrode arc material addition. Background technique [0002] High nitrogen steel has good strength, toughness, wear resistance and corrosion resistance, and has a wide range of applications and broad development prospects in various fields such as aerospace, biomedicine, and ship equipment manufacturing. The high nitrogen content of high-nitrogen steel welding wire leads to defects such as spatter, pores, and cracks during the additive process, which reduces the mechanical properties and corrosion resistance, making it difficult to prepare high-performance high-nitrogen steel components. In addition, due to its own compositional characteristics (high nitrogen, high manganese), the high nitrogen steel welding ...

AI Technical Summary

Problems solved by technology

However, for high-nitrogen steel additives, due to the high nitrogen content of high-nitrogen steel wire, the TIG welding torch is in front, forming a molten pool first, and the twin wires form an indirect arc, resulting in obvious spatter, and as the temperature of the molten pool decreases, nitrogen is not easy to escape. , forming a large number of pores, this method cannot significantly improve the problems of high nitrogen steel, such as easy splashing and many pores

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