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A special aluminum-manganese alloy powder formula for 3D printing and its preparation method and printing method

An aluminum-manganese alloy, 3D printing technology, used in additive manufacturing, process efficiency improvement, additive processing, etc., can solve the problems of high cost, component segregation, low output, etc., and achieve high corrosion resistance and mechanical properties. The effect of low anisotropy and low metallurgical defects

Active Publication Date: 2021-01-12
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are many control factors in each link, which increases the difficulty of preparation
[0004] (2) During the smelting process of the traditional method, there are gases and various inclusions in the melt, and the ingot is prone to defects such as pores, inclusions, and cracks, and the microstructures at different positions are greatly different, and the composition segregation is serious, which eventually leads to The performance (strength, plasticity, corrosion resistance, appearance quality, etc.) is reduced
[0005] (3) Traditional production and processing methods cannot manufacture alloy products with complex shapes, and at the same time, the output is low, the cost is high, the yield is low, and the processing cost is high
However, if the traditional Al-Mn alloy is directly used for laser 3D printing, problems such as cracking and poor performance will occur, because there is currently no Al-Mn alloy specially used for 3D printing.

Method used

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  • A special aluminum-manganese alloy powder formula for 3D printing and its preparation method and printing method
  • A special aluminum-manganese alloy powder formula for 3D printing and its preparation method and printing method
  • A special aluminum-manganese alloy powder formula for 3D printing and its preparation method and printing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Aluminum-manganese alloy for SLM printing, containing the following components in mass percentage: Mn: 4.2wt%, Sc: 0.6wt%, Zr: 0.2wt%, Mg: 0.8wt%, Fe: 0.2wt%, Si: 0.2 wt%, Cu: 0.1wt%; Zn: 0.1wt%, the rest is Al.

[0034] The aluminum-manganese alloy powder for 3D printing with the above ingredients is prepared by vacuum melting, and then using argon atomization to make powder: the melting temperature is 850°C, and the pressure in the melting furnace is 0.5MPa; then the metal is melted using argon as the medium The droplets are atomized, and the atomization pressure is 7MPa. The particle shape of the prepared powder is spherical, and the powder below 250 mesh is sieved, which can be used for SLM printing.

[0035] In a vacuum drying oven, the sieved powder was dried at 90°C for 8 hours, and the heating temperature of the substrate was increased to 250°C during printing.

[0036] The above 3D printing aluminum alloy powder fiber laser SLM printing process is laser power...

Embodiment 2

[0038] Special rare earth aluminum alloy for SLM printing, containing the following components in mass percentage: Mn: 2.5wt%, Sc: 0.3wt%, Zr: 0.1wt%, Mg: 1.2wt%, Fe: 0.2wt%, Si: 0.2 wt%, Cu: 0.1wt%; Zn: 0.1wt%, the rest is Al.

[0039] The preparation method of the aluminum-manganese alloy powder for 3D printing with the above ingredients is as follows: put the powder into an induction melting furnace for vacuum melting and then use argon atomization to make powder: the melting temperature is 900 ° C, and the pressure in the melting furnace is 0.6 MPa; then use Argon gas is used as the medium to atomize metal droplets, and the atomization pressure is 8.5MPa. The particle shape of the prepared powder is spherical, and the powder below 250 mesh is sieved, which can be used for SLM printing.

[0040] Dry the sieved powder at 90°C for 8 hours in a vacuum drying oven, and increase the heating temperature of the substrate to 300°C during printing.

[0041] The 3D printing aluminu...

Embodiment 3

[0048] Embodiment 3 (comparative example):

[0049] Special rare earth aluminum alloy for SLM printing, containing the following components in mass percentage: Mn: 6.5wt%, Sc: 1.3wt%, Zr: 0.8wt%, Mg: 1.5wt%, Fe: 0.5wt%, Si: 0.2 wt%, Cu: 0.1wt%; Zn: 0.1wt%, the rest is Al.

[0050] The preparation method of the aluminum-manganese alloy powder for 3D printing with the above ingredients is: vacuum melting, and then using argon atomization to make powder: the melting temperature is 900°C, and the pressure in the melting furnace is 0.6MPa; then using argon as the medium to melt the metal The droplets are atomized, and the atomization pressure is 8.5MPa. The particle shape of the prepared powder is spherical, and the powder below 250 mesh is sieved, which can be used for SLM printing.

[0051] In a vacuum drying oven, the sieved powder was dried at 90°C for 8 hours, and the heating temperature of the substrate was increased to 300°C during printing.

[0052] The 3D printing alumi...

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Abstract

The invention discloses a special aluminum-manganese alloy powder formula for 3D printing, a preparation method and a printing method thereof, wherein the alloy powder is a pre-alloy, and in terms of mass percentage, it includes: Mn: 1.0-5.5wt%; Sc : 0.3~0.6wt%; Zr: 0.1~0.3wt%; Mg: 0.8~1.2wt%; Si: 0.2~0.25wt%; Fe: 0.2~0.25wt%, Cu: 0.1~0.2wt%; Zn: 0.1 ~0.2wt%, the rest is Al. The parts of the Al-Mn alloy composition of the present invention after laser 3D printing have no cracks, high density, corrosion resistance, high mechanical properties, and low anisotropy; it solves the problem that the traditional casting and forging Al-Mn alloy composition can be directly used in 3D printing The problem of easy cracking and low mechanical properties. After the alloy composition of the invention is 3D printed, the tensile strength is higher than that of the traditional cast and forged aluminum-manganese alloy. At the same time, compared with other mature 3D printing Al-Si alloys, the alloy of the present invention has higher corrosion resistance and mechanical properties.

Description

technical field [0001] The invention belongs to the technical field of special materials for additive manufacturing, and specifically relates to a special aluminum-manganese alloy powder formula for 3D printing, a preparation method and a printing method thereof. Background technique [0002] Al-Mn alloy has good formability, weldability, high corrosion resistance, good thermal conductivity, can be brazed, and low cost, and is widely used in building materials, food packaging, and automotive industries with good plasticity and good weldability. load parts. This alloy is not high in strength and cannot be strengthened by heat treatment. In order to obtain good mechanical properties, work hardening is usually used. So far, this alloy product mainly adopts the traditional method: after smelting and casting, the cast billet is formed by rolling, extrusion, forging and other processing methods. The alloy products prepared by these methods have the following problems: [0003] ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/00B33Y70/00B33Y10/00B22F9/08B22F3/105
CPCC22C21/00B22F9/082B33Y10/00B33Y70/00B22F10/00B22F10/36B22F10/28B22F10/64Y02P10/25
Inventor 李瑞迪陈慧袁铁锤王敏卜牛朋达陈超
Owner CENT SOUTH UNIV
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