A kind of 3D printing rare earth magnesium alloy powder and preparation method thereof

Abstract

The invention discloses a 3D printed rare earth magnesium alloy powder. The 3D printed rare earth magnesium alloy powder is composed of the following components by weight percentage: rare earth element Y: 3.69%, rare earth element Sm: 4.47%, Zn : 2.47%, Zr: 0.74%, the balance is magnesium and trace impurities, and the sum of the percentages of the components is 100%. The powder appearance is granular powder, the particle size distribution of the powder is 40-70 μm, and the average particle size is 55 μm. The preparation method uses the cast rod as the initial material, mechanically grinds the alloy powder in a high-purity argon-protected glove box, and then passes the alloy powder through a ball mill to obtain a 3D printed rare earth magnesium alloy powder, which can It meets the requirements of 3D printing powder materials, has low economic cost, is safe and reliable, and is suitable for a wide range of scientific research, not limited to commercial powders.

Description

technical field [0001] The invention relates to a rare earth magnesium alloy powder material and its preparation, in particular to a rare earth magnesium alloy powder material suitable for 3D printing and a preparation method thereof. Background technique [0002] The current magnesium alloy precision parts manufacturing process mostly adopts die-casting and semi-solid forming technology. These traditional casting processes bring coarse grains, composition segregation, shrinkage cavity, shrinkage porosity, pores, inclusions, cracks and other defects, which seriously hinder development of magnesium alloys. In the past ten years, especially with the development of 3D printing and additive manufacturing technology in recent years, the defects caused by traditional casting technology can be almost eliminated, and 3D printing technology can directly manufacture terminal metal products, eliminating the need for intermediate transition links , Obtain an entity with a density of ne...

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Problems solved by technology

The preparation process of powder materials, the rotating electrode method and the atomization method, have high requirements for equipment and are relatively expensive, and the powder making unit has strict requirements on the quantity of powder and the safety of the powder making process. During the process, the powder material is solidified after melting at high temperature, and the magnesium alloy is chemically active and easily oxidized. Although the protective atmosphere is filled in the powder preparation process, the protective gas often contains oxygen, which makes the final preparation The powder will be more or less oxidized, so it is not conducive to the initial research of 3D printing experiments

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