AlSi7Mg powder material and preparation method and application thereof

A powder material and powder metallurgy technology, applied in the field of powder materials for metal 3D printing, can solve the problems of low product performance, small output, high impurity content, etc., and achieve the effects of low density, good manufacturability and corrosion resistance

Active Publication Date: 2018-02-16
BEIJING BAOHANG ADVANCED MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 3D printing metal powder has problems such as difficult preparation, small output, and low product performance
The aforementioned literature only discloses the general components of AlSi7Mg 3D printing powder, and does not screen and optimize the composition and proportion of the powder material, and the oxygen content in the powder material is very high (such as 1000-2000ppm), and the impurity content is high, for example, The content of Fe in AlSi7Mg 3D printing powder produced by SLM solution is ≥0.4%, while the content of Mn in AlSi7Mg 3D printing powder produced by LPW is 0.5%-0.6%

Method used

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  • AlSi7Mg powder material and preparation method and application thereof
  • AlSi7Mg powder material and preparation method and application thereof
  • AlSi7Mg powder material and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1-7

[0080] Example 1-7 Preparation of AlSi7Mg powder material

[0081] The preparation of AlSi7Mg powder material by inert gas atomization method includes the following steps:

[0082] (1) Weigh the required amount of raw material aluminum-silicon alloy, aluminum-titanium alloy, aluminum ingot, and magnesium ingot according to Table 1, and place them in the melting crucible;

[0083] (2) After evacuating the melting crucible to a vacuum degree of 2.5 Pa, fill it with argon to a slightly positive pressure;

[0084] (3) Melting aluminum-silicon alloy, aluminum-titanium alloy, refined aluminum ingot, and magnesium ingot into a solution at 800°C, and holding the prepared molten liquid at 750°C for 40 minutes to obtain an alloy molten liquid;

[0085] (4) Pour argon gas into the smelting crucible until its pressure is 2.0 MPa, and atomize the obtained alloy molten liquid;

[0086] (5) After the atomization is over, close the pressure equalizing valve, blow argon into the furnace body to atmosph...

Embodiment 8

[0088] Example 8 Preparation of AlSi7Mg powder material

[0089] The preparation of AlSi7Mg powder material by inert gas atomization method includes the following steps:

[0090] (1) Weigh the required amount of raw material aluminum-silicon alloy, aluminum-titanium alloy, aluminum ingot, and magnesium ingot according to Table 1, and place them in the melting crucible;

[0091] (2) After the smelting crucible is evacuated to its vacuum degree of 3.2 Pa, then nitrogen is filled to atmospheric pressure;

[0092] (3) Melting the aluminum-silicon alloy, aluminum-titanium alloy, refined aluminum ingot, and magnesium ingot into a solution at 850°C, and holding the obtained molten liquid at 800°C for 35 minutes to obtain an alloy molten liquid;

[0093] (4) Pour argon gas into the smelting crucible until its pressure is 2.5MPa, and atomize the obtained alloy molten liquid;

[0094] (5) After the atomization is completed, close the pressure equalizing valve, blow nitrogen into the furnace body...

Embodiment 9

[0096] Example 9 Preparation of AlSi7Mg powder material

[0097] The preparation of AlSi7Mg powder material by inert gas atomization method includes the following steps:

[0098] (1) Weigh the required amount of raw material aluminum-silicon alloy, aluminum-titanium alloy, aluminum ingot, and magnesium ingot according to Table 1, and place them in the melting crucible;

[0099] (2) After evacuating the melting crucible to its vacuum degree of 2.8 Pa, fill it with helium to atmospheric pressure;

[0100] (3) Melting the aluminum-silicon alloy, aluminum-titanium alloy, refined aluminum ingot, and magnesium ingot into a solution at 900°C, and holding the obtained molten liquid at 850°C for 30 minutes to obtain an alloy molten liquid;

[0101] (4) Pour helium into the smelting crucible until its pressure is 2.8MPa, and atomize the obtained alloy molten liquid;

[0102] (5) After the atomization is finished, close the pressure equalizing valve, blow helium into the furnace body to atmospher...

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Abstract

The invention relates to an AlSi7Mg powder material for 3D printing and a preparation method thereof. Main alloy elements contained in the powder material include, by mass, 4.5-9.5% of Si, 0.25-0.95%of Mg, 0.01-0.45% of Ti, and the balance aluminum. The powder material is prepared through an inert gas atomization method. A high-temperature smelting solution of the powder material is smashed intosmall liquid drops through high-speed gas flow, and then the small liquid drops are cooled rapidly to be solidified into metal powder. The prepared metal powder is collected and screened for particlesize grading to obtain the powder material. The AlSi7Mg powder material provided by the invention meets the requirements for the quality of the industrial-grade metal powder material for 3D printing and has the advantages of being high in purity, little in impurity content, uniform in alloy component, low in oxygen content, high in sphericity, less in satellite ball, uniform in powder size distribution, controllable in quality, excellent in powder performance and the like.

Description

Technical field [0001] The invention relates to the field of powder materials for metal 3D printing, in particular to an AlSi7Mg powder material and a preparation method and application thereof. Background technique [0002] 3D printing is an emerging and rapidly developing rapid prototyping manufacturing technology. Through 3D printing equipment, metal powder, ceramic powder and other materials are stacked and bonded layer by layer, and superimposed and molded to produce solid products, which are widely used in manufacturing military, aerospace, home appliances, The outstanding advantage of modern models, molds and parts in the fields of biomedicine is that no machining or any mold is required, parts of any shape are directly generated from computer graphics data, which significantly shortens the product development cycle and improves the efficiency of raw material utilization and production Efficiency, reduce production costs, avoid data leakage and time span of outsourcing pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00B22F9/08C22C21/02C22C1/03B33Y70/00C23C4/06B23K35/28
CPCB22F1/0003B22F9/082B23K35/286B33Y70/00C22C1/026C22C1/03C22C21/02C23C4/06
Inventor 李振民孟庆宇刘干王联波
Owner BEIJING BAOHANG ADVANCED MATERIALS CO LTD
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