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Method for forming zinc alloy product through selective laser melting technology

A selective laser melting and zinc alloy technology, which is applied in the direction of additive manufacturing, metal processing equipment, process efficiency improvement, etc., can solve the problems of poor surface roughness, affecting the performance of zinc alloy parts, low density, etc., and achieve simplified processing The effect of process flow, excellent surface finish and excellent mechanical properties

Active Publication Date: 2019-02-22
北京科技大学广州新材料研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there are few successful cases of zinc alloy parts successfully prepared by SLM technology, mainly due to the low melting point and low boiling point (about 900°C) of zinc alloy, and the generation of a large amount of steam and particle sputtering during the laser melting process. , seriously affect the performance of zinc alloy parts, there are low density, poor surface roughness, and even the final part is not formed, which is the biggest factor restricting the development of zinc alloy selective laser melting technology
In view of the defects of the existing traditional casting zinc alloy and the technical difficulty of forming zinc alloy by SLM technology, it is necessary to explore a process method for forming zinc alloy products by selective laser melting technology, so as to expand the processing and preparation methods of zinc alloy products, especially It is of reference significance for the formation of small batches of personalized customized zinc alloy parts, and the formation of low melting point and low boiling point metals and their alloys by selective laser melting technology

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0026] (a). Zinc alloy powder is ZnAl12, powder particle size distribution D10 is 15.32μm, D50 is 33.87μm, D90 is 59.87μm; the fluidity of zinc alloy powder is 35.02 / 50g, and the bulk density is 3.02g / cm 3 , the oxygen content is 0.33%.

[0027] (b). Use 3D modeling software to construct 10×10×10mm 3 The three-dimensional structure model of the cube is converted into a .stl format file for output, and then the model is processed by 3D printing editing software and saved as a .slm format file, and finally imported into the computer control system of the SLM forming equipment for printing tasks.

[0028] (c). Before starting the printing task, make preparations. First, try spreading the powder to a thin layer of metal powder, then wipe the laser lens, start vacuuming and introduce an inert atmosphere into the processing chamber until the oxygen content is lower than 0.05%, and the substrate needs to be preheated to a certain temperature. Due to the low melting point and boilin...

Embodiment approach 2

[0033] (a). Zinc alloy powder is ZnAl12, powder particle size distribution D10 is 15.32μm, D50 is 33.87μm, D90 is 59.87μm; the fluidity of zinc alloy powder is 35.02 / 50g, and the bulk density is 3.02g / cm 3 , the oxygen content is 0.33%.

[0034] (b). Use 3D modeling software to construct 10×10×10mm 3 The three-dimensional structure model of the cube is converted into a .stl format file for output, and then the model is processed by 3D printing editing software and saved as a .slm format file, and finally imported into the computer control system of the SLM forming equipment for printing tasks.

[0035](c). Before starting the printing task, make preparations. First, try spreading the powder to a thin layer of metal powder, then wipe the laser lens, start vacuuming and introduce an inert atmosphere into the processing chamber until the oxygen content is lower than 0.05%, and the substrate needs to be preheated to a certain temperature. Due to the low melting point and boiling...

Embodiment approach 3

[0040] (a). Zinc alloy powder is ZnAl12, powder particle size distribution D10 is 15.32μm, D50 is 33.87μm, D90 is 59.87μm; the fluidity of zinc alloy powder is 35.02 / 50g, and the bulk density is 3.02g / cm 3 , the oxygen content is 0.33%.

[0041] (b). Use 3D modeling software to construct 10×10×10mm 3 The three-dimensional structure model of the cube is converted into a .stl format file for output, and then the model is processed by 3D printing editing software and saved as a .slm format file, and finally imported into the computer control system of the SLM forming equipment for printing tasks.

[0042] (c). Before starting the printing task, make preparations. First, try spreading the powder to a thin layer of metal powder, then wipe the laser lens, start vacuuming and introduce an inert atmosphere into the processing chamber until the oxygen content is lower than 0.05%, and the substrate needs to be preheated to a certain temperature. Due to the low melting point and boilin...

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Abstract

The invention relates to the field of material preparation, and provides a method for forming a zinc alloy product through the selective laser melting technology. The method comprises the following steps that a three-dimensional structural model of the product needing to be formed is firstly constructed, and is treated and guided into printing forming equipment computer through 3D printing editingsoftware to carry out a printing task; processing technological parameters of a zinc alloy powder laser melting system are set; printing preparation work is done, wherein powder pre-paving, airflow circulating system checking, check parameter setting and the like are carried out; and powder is fast melted and solidified under protection of inert atmosphere, and is stacked layer by layer to form the product. According to the method, specific zinc alloy ingredients and specification parameters thereof are selected, the processing technological parameters are optimized, and the zinc alloy product stable in quality and excellent in mechanical property and surface smoothness can be obtained. According to the method, the processing procedure flow is optimized, and the method has unparalleled advantages for preparing high-precision complex-structure zinc alloy through the selective laser melting technology, especially forming small-batch personalized zinc alloy parts.

Description

technical field [0001] The invention relates to the field of material preparation, in particular to a method for rapidly forming zinc alloy products by adopting a selective laser melting technology. Background technique [0002] In recent years, with the popularization of copper alloy applications, there has been a shortage of international copper resources, resulting in more and more expensive copper raw materials. Therefore, the development of copper and copper alloy substitute materials has been accelerated to meet the needs of modern industries, and it has become a popular choice for researchers and industries. world consensus. Due to the advantages of rich resources, low melting point, excellent mechanical properties, low raw material prices, low relative density, shock absorption, low friction coefficient, no sparks, and easy cutting, zinc alloys have good casting properties, and the cost of castings is about 40% to 60% of copper alloy, after deformation and heat trea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/105B22F1/00B22F3/24C25F3/22B33Y10/00
CPCC25F3/22B22F3/24B33Y10/00B22F2003/247B22F10/00B22F1/052B22F10/66B22F10/28B22F10/36B22F12/41B22F10/366B22F10/68B22F10/32B22F10/80Y02P10/25
Inventor 何新波马成龙曹顺利曲选辉
Owner 北京科技大学广州新材料研究院
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