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A preparation device and preparation method of narrowly distributed spherical metal powder for additive manufacturing

A metal powder and additive manufacturing technology, which is applied in the field of spherical metal powder preparation devices, can solve problems such as unsuitable alloy powder, and achieve the effects of improving powder yield, good heat preservation effect, and increasing jet gas velocity

Active Publication Date: 2021-10-29
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the electrolysis and reduction methods are limited to the preparation of elemental metal powders, not suitable for the preparation of alloy powders

Method used

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  • A preparation device and preparation method of narrowly distributed spherical metal powder for additive manufacturing
  • A preparation device and preparation method of narrowly distributed spherical metal powder for additive manufacturing
  • A preparation device and preparation method of narrowly distributed spherical metal powder for additive manufacturing

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Experimental program
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Effect test

Embodiment 1

[0039] The supersonic gas atomization method is adopted to change the traditional plugging smelting system and adopt figure 1 The pouring method shown in the pouring crucible shown in the middle is smelting and atomizing, and the level of powder prepared by atomization is increased to 50kg / heat. At the same time, the preparation method of the present invention has the function of infrared temperature measurement, and at the same time, it is calibrated by a thermocouple to realize accurate measurement of the temperature rise in the preparation process. At the same time, the insulation structure of the tundish is as follows: figure 2 As shown, it adopts a layered structure design, the outer layer is a stainless steel sheath, the inner layer is an insulated crucible, and the middle layer is filled with magnesia, with a filling thickness of 0.5-2cm and a height of 15-20cm. The precise control of the temperature ensures that the temperature of the melt is stable during the pouring...

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Abstract

The invention discloses a preparation device and a preparation method of narrowly distributed spherical metal powder for additive manufacturing, and belongs to the technical fields of gas atomization powder making and 3D printing. The present invention adopts a supersonic gas atomization method, smelts by pouring a crucible, and increases the level of powder prepared by atomization to 50kg / heat. The unique structure of the tundish heat preservation system is adopted, the interlayer is filled with sand and the inner layer is sputtered with graphite, which not only ensures a high heating rate, but also has a good heat preservation effect, so that the temperature of the melt is stable during the pouring process and maintains good fluidity, so that the metal The droplets have sufficient spheroidization time and solidification time to obtain spherical powder. The powder obtained by the preparation method of the present invention has the advantages of high yield and narrow particle size distribution, and simultaneously has good sphericity and low oxygen content.

Description

technical field [0001] The invention relates to the technical fields of gas atomization powder making and 3D printing, in particular to a preparation device and a preparation method of narrowly distributed spherical metal powder for additive manufacturing. Background technique [0002] With the rapid development of 3D printing technology in recent years, its components are more and more widely used in aerospace, high-speed rail ships, automobiles, military industry, medical implants, etc. For the high temperature resistance performance required by components in harsh environments, ships 3D printing alloy components with these advantages are in urgent demand. In some environments, alloy steel components have large dimensions, complex structures, high strength and toughness, and high wear resistance or thermal fatigue resistance on the surface. Its traditional manufacturing process has a long cycle, high material requirements, and fine and complex production; and its harsh se...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/08
CPCB22F9/082B22F2009/0848B22F2009/0888
Inventor 吕威闫孙文海杨伯俊张锁德王建强
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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