3D printing method for metal material

Abstract

The invention belongs to the field of metal 3D printing and discloses a 3D printing (additive manufacturing) method for a metal material. By taking stable metal powder slurry prepared by metal powder,an organic solvent, a bonder, a dispersant, a suspending agent and a degassing agent or a solid-liquid mixture such as a suspension liquid, a dispersion liquid, a complex and a colloid as a forming material, a metal product which is fine in structure is prepared simply and rapidly by adopting a novel selective laser melting mode. The 3D printing method comprises the following steps of uniformly mixing metal or alloy powder, the organic solvent, the bonder, the dispersant, the suspending agent and the degassing agent to prepare the metal powder slurry which is stable and good in flowability, wherein a storage tank is connected to a base, a printing platform is connected to a lifting structure and is located right above the storage tank, and a laser light source system is placed below the storage tank; and establishing a printing model by three-dimensional software, and setting laser process parameters for SLM printing. According to the 3D printing method, the powder paving process is reduced, the device is simplified, the printing efficiency is improved, and the metal powder splashing and oxidizing problems are solved.

Description

technical field [0001] The invention belongs to the field of metal 3D printing, and relates to a 3D printing (additive manufacturing) method of metal materials. Background technique [0002] 3D printing (additive manufacturing) technology is a technology based on computer design, material processing and modeling, and digital models, with ceramic materials, metal materials, polymer materials and biomedical materials as raw materials, controlled by programs and numerical control systems, to sinter , Melting, light curing, extrusion, spraying and other ways to accumulate layer by layer, so as to form the production molding technology of preset components. Different from traditional pouring molding, raw material subtractive cutting, splicing and assembly methods, 3D printing technology is a "bottom-up" additive manufacturing molding technology, which is a process from scratch. 3D printing technology makes up for the shortcomings of traditional manufacturing methods that are dif...

AI Technical Summary

Problems solved by technology

However, selective laser melting technology also has deficiencies, such as higher requirements on the shape of metal powder, better fluidity, and higher requirements on the powder spreading system; there are often problems of powder splashing during the printing process, which directly affects the metal powder. Forming and tissue properties of materials; high equipment prices, vacuum circulation system and powder spreading system further increase its cost, thus limiting the application and popularization of selective laser melting technology in metal material printing

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