Preparation process of 3D printing metal powder

Abstract

The invention discloses a preparation process of 3D printing metal powder, and relates to the technical field of 3D printing powder. The preparation process of the 3D printing metal powder comprises the steps of (1) mixed material pretreatment, (2) smelting, (3) metal powder slurry preparation, (4) air blowing atomization and (5) collection. According to the preparation process of the 3D printingmetal powder, mixed powder of copper powder, nickel powder and tin powder is adopted as a matrix, the use quantity and the size are strictly controlled, and no influence is generated on overall flowability of alloy powder; the purity and quality of a smelted alloy can be improved through high-temperature refining of a multi-component refining agent; the heat resistance, flame retardance and oxidation resistance of the alloy powder are improved through an organic bond; and in the air blowing atomization process, helium serves as subsequent atomization power, the metal size is enlarged fast, theparticle size of atomized metal particles is smaller, the degree of sphericity is good, the crystal structure is more stable, and the particle size uniformity of the 3D printing metal powder is excellent.

Description

Technical field: [0001] The invention relates to the technical field of 3D printing powder, in particular to a preparation process of 3D printing metal powder. Background technique: [0002] The use of 3D printing technology to produce high-performance, high-dimensional precision metal parts requires suitable 3D printing metal powders. At present, most of the metal powders required for 3D printing directly use thermal spray powder, and thermal spray metal powder is difficult to meet the needs of 3D printing due to uneven particle size and high oxygen content. Therefore, the preparation of spherical metal powder with fine and uniform particle size and low oxygen content suitable for 3D printing requirements is a difficult problem facing the current 3D printing field. [0003] At present, in terms of preparation methods of 3D metal powder, there are radio frequency plasma method, plasma rotating electrode method, gas atomization method, etc. The radio frequency plasma method...

AI Technical Summary

Problems solved by technology

The radio frequency plasma method and the plasma rotating electrode method require radio frequency plasma torches, high-energy plasma guns, etc. as heat sources. The required equipment is complex, the raw material requirements are high, and the cost is high. It is difficult to meet the production needs of large-scale 3D printing metal powders.

The gas atomization method is a suitable method for preparing the metal powder required for 3D printing, but there are still some problems in the existing process, such as the atomization gas can only slow down the oxidation of the metal powder but cannot avoid the oxidation of the metal powder