Electric arc material increasing and electrically aided hot rolling composite manufacturing method and device

Abstract

The invention relates to an electric arc material increasing and electrically aided hot rolling composite manufacturing method and device. The method comprises the following steps that a substrate isfixed on a workbench, electric arc deposition is finished through welding gun movement and a wire feeding mechanism, a direct current pulse power supply is started to perform heating on the substrateand a deposition layer after deposition with one layer or more layers, and a roller is adopted to perfrom hot rolling on the surface of the deposition layer when heating is performed to a preset temperature. The device comprises the substrate, a clamp, the workbench, a welding gun, the wire feeding mechanism, a temperature sensor, the roller, a rolling loading unit, a hydraulic cylinder, an electrode, a wire, the direct current pulse power supply and an insulation gasket. For the method and the device, by organically combining exteranl electric field asistant heating, hot rolling plastic deformation with the electric arc material increasing process and adopting a pulse power supply for heating, the material deformation resistance can be lowered, and the plasticity of a material can be improved; and through the coupling effect of various fields including the electric field, a thermal field and a force field, crystalline grains at the deposition layer are fined, the defects of electric arc material increasing manufacturing is overcoem, the residual stress of the deposition layer is lowered, and the comprehensive mechanical properties of the material are improved.

Description

technical field [0001] The invention relates to an additive manufacturing method and device, in particular to a composite manufacturing method and device for arc additive and electric-assisted hot rolling forming. Background technique [0002] Arc additive manufacturing is an additive manufacturing technology that uses arc or plasma arc as a heat source. Compared with laser and electron beam additive manufacturing, arc additive manufacturing technology uses wire as the forming material, and has high material utilization and deposition efficiency. , the equipment manufacturing cost is low, no closed vacuum chamber is required, and it has broad application prospects in the manufacture of large-scale structural parts. However, due to the high input heat of the arc, coarse columnar crystals appear in the material perpendicular to the deposition direction during the arc deposition process, and the inhomogeneous microstructure will significantly reduce the mechanical properties of...

AI Technical Summary

Problems solved by technology

However, for some metal materials with high strength and low plasticity at room temperature, such as titanium alloys and superalloys, the depth of plastic deformation caused by cold rolling is limited, and the columnar grain structure cannot be completely broken. requirements

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