A kind of flexible metal powder for three-dimensional printing and its preparation method and application method

Abstract

A flexible metal powder for three-dimensional printing, characterized in that it is mainly composed of metal powder embedded in a rubber body with a network structure, and is prepared from the following raw materials in parts by weight: 80-85 parts of metal powder, rubber body 10-15 parts, 2-3 parts of metal oxide, 1-3 parts of softener, 1-2 parts of interface modifier, 0.2-0.5 parts of anti-aging agent, 0.05-0.1 part of accelerator; Powder adhesion, using a double-rotor continuous mixer with longitudinal meshing and transverse stretching, the metal powder is completely embedded in the rubber body with a network, and the flexibility of the rubber body network is obtained by extrusion granulation and colloid grinding machine. metal powder. Flexible metal powder can be used to obtain green metal products through three-dimensional printing, and flexible metal products with excellent strength, flexibility and wear resistance can be obtained through thermal cross-linking treatment. It can be used to 3D print flanges, connectors, architectural models, etc. of special structures.

Description

technical field

[0001] The invention belongs to the field of 3D printing manufacturing, and in particular relates to a flexible metal powder used in 3D printing manufacturing, and further relates to a preparation method of the flexible metal powder. Background technique

[0002] The reason why the 3D printing manufacturing technology of metal materials is difficult is that the melting point of metal is relatively high, which involves various physical processes such as solid-liquid phase transition of metal, surface diffusion and heat conduction. In addition, whether the generated crystal structure is good, whether the entire test piece is uniform, internal impurities and the size of pores, etc. will cause changes in the properties of 3D printed metal products. In order to solve these problems, on the one hand, the printing process is improved, such as the power and energy distribution of the laser, the moving speed and path of the laser focus point, the feeding speed, the pr...