3D printing forming method and device for metal parts under action of magnetic field

Abstract

The invention relates to a 3D printing forming method and device for metal parts under the action of a magnetic field. Under the action of a high-energy beam and metal powder, the metal powder can be melted, electromagnetic force is applied to the outside of a molten pool, the stress state of the molten pool is changed, directional control over the solidification behavior of the metal molten pool is achieved, the internal organization of metal workpieces can be refined, and thus the performance of the metal workpieces is improved. The device comprises a first electrode, a second electrode and an electromagnetic coil which are mounted on a workbench. When the electromagnetic coil works, the electromagnetic force can be kept to act on the high-energy beam to radiate the molten pool generated by the metal powder all the time. According to the 3D printing forming method and device for the metal parts under the action of the magnetic field, the electromagnetic coil is powered up by the electrodes to generate the magnetic field, when the high-energy beam acts on the metal powder, the stress state of the metal molten pool generated by the metal powder can be affected by the electromagnetic force, the size and the direction of the electromagnetic force can be controlled by changing currents and voltages, and therefore the stress behavior of the metal molten pool can be controlled.

Description

Technical field [0001] The technology of the present invention belongs to the manufacturing field, which involves a 3D printing method and device under the action of a metal part under the action of a magnetic field.The invention uses magnetic to change the melting pond force and metallurgical behavior during the melting metal powder, thereby regulating the internal micro -organizations of the metal parts, and ultimately achieve the purpose of optimizing the macro performance of metal parts. Background technique [0002] High -energy beams mainly include laser beams, electron beams and ion beams.High -energy beam melting metal powder manufacturing technology is an advanced manufacturing technology that can achieve rapid manufacturing of close -composed secret metal parts in recent years.Compared with traditional fast -forming technology, this technology not only has the advantages of unlimited tools, fixtures and molds, and unlimited structures of forming components, but also mor...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems of uneven material composition, obvious grain orientation, and easy to produce pores and cracks in the manufacturing process of the metal powder that are troubled by the rapid melting of the background technology, the present invention provides a rapid manufacturing method for metal parts under the action of a magnetic field. Method and device, in order to minimize the occurrence of defects and improve the performance of parts

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