Method for Manufacturing Particle Reinforced Metal Matrix Composites by Twin Wire Plasma Arc Overlay Welding

Abstract

The invention discloses a method for manufacturing a particle reinforced metal-based composite part through double-wire plasma arc surfacing. Double wires are a flux-cored wire and a metal cored wire. The method comprises the steps that during surfacing: untransferable arcs are opened, a surfacing starting position is corrected, feeding position and feeding angle of the metal cored wire and the flux-cored wire are adjusted through a metal cored wire feeding mechanism and a flux-cored wire heating and feeding mechanism, transferred arcs are opened for surfacing, the metal cored wire feeding mechanism feeds the metal cored wire from the position in front of a welding gun to an arc column zone of a plasma arc, the metal cored wire is molten to form a molten pool, the flux-cored wire heating and feeding mechanism starts to feed the flux-cored wire after heating the flux-cored wire to 180 DEG C to 220 DEG C, feeding time of the flux-cored wire is delayed by 1 s to 2 s, after the metal cored wire forms the molten pool, the flux-cored wire is inserted into the molten pool from the position outside the arc column of the plasma arc, insertion depth is 2 mm to 3 mm, a robot controls the welding gun to perform surfacing layer by layer according to a set track under control of a control code, and the particle reinforced metal-based composite part is obtained through surfacing after the welding gun completes surfacing along the track.

Description

technical field [0001] The invention relates to the technical field of particle-reinforced metal-matrix composite materials and additive manufacturing, in particular to a method for manufacturing particle-reinforced metal-matrix composite material parts by twin-wire plasma arc surfacing welding. Background technique [0002] In recent years, with the vigorous development of additive manufacturing technology, the technology and application research of using additive technology to manufacture particle-reinforced metal matrix composite parts continues to increase. Additive manufacturing technology integrates the preparation of particle-reinforced metal matrix composites and shape manufacturing, and has the advantages of short process, high efficiency and low cost. [0003] Particle-reinforced metal matrix composites have both the plasticity and toughness of metals and the high strength and high stiffness of ceramics, thus showing physical and mechanical properties different fro...

AI Technical Summary

Problems solved by technology

The manufacturing process has the following problems: (1) The existing plasma arc deposition method generally uses the protective gas powder feeding method to send the powder to the molten pool area, and the utilization rate of the ceramic powder is low; (2) due to the surface rebound of the molten pool and Due to the effect of surface tension, it is difficult for ceramic powder to enter the molten pool, and only part of the powder covers the surface of the molten pool, making it difficult to form deep mixing with the metal matrix.

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