Electric arc-laser composite additive manufacturing method

Abstract

The invention discloses an electric arc-laser composite additive manufacturing method. The method comprises the following steps that the surface of a metal part to be machined is subjected to mechanical polishing, cleaning for oil stain removing and drying, the size of the metal part is measured, and then the metal part is placed on a workbench and fixed with a clamp for standby use; a three-dimensional model of the metal part to be machined is established to obtain a three-dimensional model file, the file is subjected to slicing treatment, a machining path of the electric arc additive material is obtained, process parameters of the electric arc additive material are set, and the part to be machined is subjected to layered sedimentation under an inert gas environment by adopting an electric arc fuse wire; and according to the texture of the machined metal part and the effective wall thickness of a to-be-printed layer, a corresponding laser scanning track, scanning power and scanning speed are selected through simulation of a temperature field, and the printed cladding layer is subjected to laser heat treatment. According to the method, the coarse columnar crystals in the forming part can be improved, the martensitic structure and dislocation are reduced, the anisotropy of additive manufacturing is remarkably reduced, and the forming precision is effectively controlled.

Description

technical field [0001] The invention relates to the field of additive manufacturing, in particular to an arc-laser composite additive manufacturing method. Background technique [0002] The additive manufacturing technology of metal parts was developed on the basis of rapid prototype manufacturing technology in the late 1990s, and it is an advanced manufacturing technology for directly preparing fully dense metal parts. It combines rapid prototyping technology, high-power heat source fusion deposition technology and advanced material preparation technology, adopts the idea of ​​digital discrete / build-up forming additive manufacturing, melts and deposits synchronously transported metal powder or wire through high-power heat source, and deposits on the substrate The upper layer is piled up layer by layer, so as to realize the "near net shape manufacturing" of high-performance fully dense metal parts with complex shape, fine structure and uniform composition. The metal materia...

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Problems solved by technology

[0003] At present, the existing composite additive manufacturing method is mainly the composite of heat source, such as the composite heat source of electric arc and laser as the heat source of wire melting, which is piled up layer by layer. Although the efficiency has been improved, the grains are still coarse. , large internal stress and other deficiencies; the additive method of surface cleaning and arc additive composite manufacturing is still an arc additive method in the forming process, but a cleaning method for the surface of the welding wire is added, which is useless to the forming process Change; the laser-induced arc additive manufacturing method uses laser and arc heat sources to combine, thereby forming a composite heat source to melt the wire for additive manufacturing, which does not improve the forming structure and stress distribution

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