Forming copper powder suitable for 3D printing, and manufacturing method and purposes of forming copper powder

Abstract

The invention belongs to the field of materials for 3D printing, and discloses forming copper powder suitable for 3D printing and a manufacturing method of the forming copper powder. The method comprises the steps that TU0 oxygen-free copper is smelted to 1250 DEG C-1400 DEG C by adopting an argon shield furnace, impurities mixed in fused copper liquid are removed by blowing argon at the bottom of the furnace, the copper liquid is completely fused, and temperature evenness is achieved. The fused copper liquid is injected into a tundish crucible by being protected by the argon, the copper liquid flows through a gas atomization nozzle through the tundish crucible and a guide nozzle under stable micropressure, preheated sound-speed argon flow ejected by the gas atomization nozzle washes the surface of the copper liquid to produce shear force and extrusion force, so that the copper liquid deforms, the diameter of the liquid flow becomes smaller and smaller, small liquid drops are formed finally, and then spherical metal powder is manufactured in an atomization chamber in a cooled mode. The 3D printing copper powder manufactured in the method is high in powder obtaining rate, the degree of sphericity is high, the oxygen content is less than 500 ppm, the grain size is less than 10 microns, and distribution is narrow.

Description

technical field [0001] The invention belongs to the field of materials for 3D printing, and relates to a high-performance molding copper powder material for 3D printing, a preparation method and an application thereof. The copper powder material is suitable for laser sintering. Background technique [0002] 3D printing is known as "the engine of the third industrial revolution". Currently, laser sintering and selective laser sintering have brought 3D printing into the "metal age". Some experts pointed out that the core of 3D printing is its subversion of the traditional manufacturing mode. Therefore, in a sense, the most important thing about 3D printing is not mechanical manufacturing, but material research and development. Materials will become the technical commanding heights of 3D printing. On the one hand, the direct manufacturing technology of high-performance metal components and suitable materials can significantly improve the utilization rate of materials, reduce m...

AI Technical Summary

Problems solved by technology

Due to the limitation of domestic powder making technology, it is difficult to prepare fine-grained powder, the powder yield is low, and the content of oxygen and other impurities is high. During the 3D printing process, the powder melting state is prone to unevenness, resulting in high oxide inclusion content and denseness in the product. Poor properties, low strength, uneven structure, etc. The main problems of domestic powders are concentrated in product quality and batch stability, including: ① Stability of powder components (inclusion quantity, oxygen content, composition uniformity); ② Stability of powder physical properties (particle size distribution, powder morphology, fluidity, bulk ratio, etc.); ③ Yield problem (low yield of narrow particle size powder), etc.

[0004] At present, most of the materials used in my country's 3D printing rapid prototyping technology need to be imported from abroad, or equipment manufacturers invest a lot of energy and funds in research and development, which is expensive, resulting in increased production costs. Low, localization of 3D printing materials is imperative