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3D printing special alloy powder and preparing method thereof

An alloy powder and 3D printing technology, applied in the field of 3D printing, can solve the problems that restrict the promotion and popularization of 3D metal forming technology, the powder shape is uncontrollable, and the powder quality is uncontrollable, so as to improve the physical and chemical properties and surface finish. , Improve the effect of powder purity

Inactive Publication Date: 2018-12-07
湖南伊澍制造股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the uncontrollable powder shape and large particle size defects of the metal materials in the prior art, they have high energy reflection, poor fluidity, high oxygen content, and uncontrollable powder quality, which seriously restricts the promotion and popularization of 3D metal forming technology.

Method used

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  • 3D printing special alloy powder and preparing method thereof
  • 3D printing special alloy powder and preparing method thereof

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preparation example Construction

[0019] The invention provides a preparation method of 3D printing special alloy powder, comprising the following steps:

[0020] Mix tungsten carbide powder, cobalt powder, chromium powder, aluminum powder and titanium powder and then ball mill to obtain mixed metal powder;

[0021] The mixed metal powder is subjected to induction plasma spheroidization treatment to obtain 3D printing special alloy powder.

[0022] Preferably, the ion gas source of the induction plasma spheroidization treatment is Ar and H 2 ,.

[0023] In the present invention, tungsten carbide powder, cobalt powder, chromium powder, aluminum powder and titanium powder are mixed and ball milled to obtain mixed metal powder; in the present invention, the tungsten carbide powder, cobalt powder, chromium powder, aluminum powder and titanium powder The independent particle size is preferably 1 to 10 μm, more preferably 2 to 8 μm, and most preferably 4 to 6 μm.

[0024] In the present invention, the mass ratio ...

Embodiment 1

[0036] 60 parts by weight of Co powder, 32 parts by weight of Cr powder, 7 parts by weight of Al powder, 1 part by weight of Ti powder, 1900 parts by weight of WC powder and 8000 parts by weight of water wet Mixed by ball milling for 32 hours, in the spray drying tower, carry out spray drying under the pressure of 0.8MPa (the inlet temperature of the spray drying tower is 180 ℃, the temperature of the outlet is 120 ℃), and the obtained particle size is 2 μm Mix metal powder left and right;

[0037] Using Ar and H 2 It is the plasma gas source, the circulating Ar is the quenching gas, the power is 45kw, and the powder feeding rate is 5Kg / h. Print special alloy powder;

[0038] figure 1 It is the SEM image of the 3D printing special alloy powder. It can be seen from the figure that the alloy powder of the present invention has a spherical shape and a small particle size after spheroidization treatment.

Embodiment 2

[0040] 50 parts by weight of Co powder, 38 parts by weight of Cr powder, 10 parts by weight of Al powder, 2 parts by weight of Ti powder, 1900 parts by weight of WC powder and 8000 parts by weight of water wet Mixed by ball milling for 36 hours, in the spray drying tower, carry out spray drying under the pressure of 1.0MPa (the inlet temperature of the spray drying tower is 200 ℃, the temperature of the outlet is 120 ℃), and the obtained particle size is 2 μm Mix metal powder left and right;

[0041] Using Ar and H 2 It is the plasma gas source, the circulating Ar is the quenching gas, the power is 45kw, and the powder feeding rate is 5Kg / h. Print specialty alloy powders.

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Abstract

The invention provides a preparing method of 3D printing special alloy powder. The preparing method comprises the following steps that tungsten carbide powder, cobalt powder, chromium powder, aluminite powder and titanium powder are mixed to be subjected to ball milling, and mixed metal powder is obtained; and the mixed metal powder is subjected to induction plasma spheroidization treatment, and the 3D printing special alloy powder is obtained. According to the preparing method, high temperature of plasmas is used as a heat source to melt and evaporate raw material powder, the spheroidizationprocess of the irregular raw material powder can be achieved, and the physical and chemical characteristics of the powder can be effectively improved and are mainly showed in improving the liquidity of the alloy powder, reducing the powder porosity, improving the powder density, reducing powder brittleness, improving particle surface smoothness, improving powder purity and accurately controlling the oxygen content. According to the embodiment, the 3D printing special alloy powder prepared through the method has the high powder density, good liquidity and the accurate oxygen content.

Description

technical field [0001] The invention relates to the technical field of 3D printing, in particular to a 3D printing special alloy powder and a preparation method thereof. Background technique [0002] Additive manufacturing (also known as 3D printing) directly manufactures three-dimensional solid parts by accumulating materials layer by layer under the drive of the three-dimensional data of the parts. It has the characteristics of full flexibility, networking, and intelligence. "Third Industrial Revolution". [0003] At present, dozens of additive manufacturing technologies have been developed, such as selective light curing (SLA), fused extrusion deposition (FDM), layered solid manufacturing (LOM), etc. The materials used in most additive manufacturing technologies are paper, wax, plastic, polymer materials, etc., and the technology is relatively mature. The additive manufacturing technology of metal materials commonly used in industry started relatively late, and it is an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/14B22F1/00B33Y70/00C22C29/08
CPCC22C29/067C22C29/08B22F9/14B33Y70/00B22F1/065
Inventor 刘丹
Owner 湖南伊澍制造股份有限公司
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