Preparation method for AlSi10Mg aluminum alloy superfine powder for 3D printing

A 3D printing, aluminum alloy technology, applied in the direction of additive processing, etc., can solve the problem of not finding the preparation method of AlSi10Mg aluminum alloy ultrafine powder, etc., and achieve the effect of low oxygen content, accurate particle size control and high purity

Inactive Publication Date: 2017-05-31
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

Through the search, no public literature on the preparation method and corresponding process parameters of AlSi10Mg aluminum alloy ultrafine powder for 3D printing was found

Method used

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  • Preparation method for AlSi10Mg aluminum alloy superfine powder for 3D printing
  • Preparation method for AlSi10Mg aluminum alloy superfine powder for 3D printing
  • Preparation method for AlSi10Mg aluminum alloy superfine powder for 3D printing

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preparation example Construction

[0010] The present invention will be described in further detail below. A method for preparing AlSi10Mg aluminum alloy ultrafine powder for 3D printing, the weight percentage of each component of the prepared AlSi10Mg aluminum alloy ultrafine powder is: Si: 9% to 11%; Mg: 0.25% to 0.45%; Al: Yu The content of impurity elements is: O: ≤0.12%; Fe: ≤0.55%; Ti: ≤0.15%; Zn: ≤0.10%; Cu: ≤0.05%; Ni: ≤0.05%; Mn: ≤0.45%; : ≤0.05%; Sn: ≤0.05%; characterized in that, the preparation steps are as follows:

[0011] 1. Supersonic gas atomization: According to the ingredients, refined aluminum ingots, primary magnesium ingots, and aluminum-silicon intermediate alloy ingots are used to prepare furnace charges. Using a vacuum atomization furnace, the charge is smelted in an atmosphere that is first vacuumed and protected by high-purity nitrogen. After sufficient smelting, use high-purity nitrogen to atomize the alloy melt. The atomization temperature is 740°C-820°C, and the atomization pres...

Embodiment 1

[0014] According to the ingredients, refined aluminum ingots (purity ≥ 99.99%), primary magnesium ingots (purity ≥ 99.95%) and AlSi12A intermediate alloy ingots (Si content 12%) are used to prepare charge. Using a vacuum atomization furnace, the charge is smelted in an atmosphere that is first vacuumed and protected by high-purity nitrogen. After sufficient smelting, use high-purity nitrogen to atomize the alloy melt. The atomization temperature is 800°C, and the atomization pressure is 2.5MPa. Thereby obtaining the atomized original powder of AlSi10Mg aluminum alloy ultrafine powder.

[0015] After the atomization is completed, the atomized raw powder of AlSi10Mg aluminum alloy ultrafine powder is screened by ultrasonic vibration screening equipment. According to the user's requirements for powder particle size, select 300-mesh and 500-mesh stainless steel screens, and install the screens in the order that the 500-mesh screen is on the bottom and the 300-mesh screen is on t...

Embodiment 2

[0023] According to the ingredients, refined aluminum ingots (purity ≥ 99.99%), primary magnesium ingots (purity ≥ 99.95%) and AlSi12A intermediate alloy ingots (Si content 12%) are used to prepare charge. Using a vacuum atomization furnace, the charge is smelted in an atmosphere that is first vacuumed and protected by high-purity nitrogen. After sufficient smelting, use high-purity nitrogen to atomize the alloy melt. The atomization temperature is 740°C, and the atomization pressure is 1.5MPa. Thereby obtaining the atomized original powder of AlSi10Mg aluminum alloy ultrafine powder.

[0024] After the atomization is completed, the atomized raw powder of AlSi10Mg aluminum alloy ultrafine powder is screened by ultrasonic vibration screening equipment. According to the user's requirements for powder particle size, select 250-mesh and 500-mesh stainless steel screens, and install the screens in the order that the 500-mesh screen is on the bottom and the 250-mesh screen is on t...

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Abstract

The invention belongs to the technical field of metal and alloy powder preparation, and relates to a preparation method for AlSi10Mg aluminum alloy superfine powder for 3D printing. The preparation method is characterized by comprising the following preparation steps of: performing supersonic-speed gas atomization and ultrasonic-wave vibratory screening. By utilizing homemade equipment, the invention provides the preparation method for AlSi10Mg aluminum alloy superfine powder for 3D printing. Powder prepared by the method has the advantages such as small pollution in a process, high purity, low oxygen content, precise grain size control and low cost, can meet requirements of the 3D printing process, and also can realize replacing imported powder.

Description

technical field [0001] The invention belongs to the technical field of metal and alloy powder preparation, and relates to a preparation method of AlSi10Mg aluminum alloy ultrafine powder for 3D printing. Background technique [0002] Selective Laser Melting (SLM) is a relatively mature and commercially applied 3D printing technology (Additive Manufacturing, AM). This technology is based on ultra-fine metal powder as raw material, using 3D CAD digital model and special laser beam energy equipment to automatically control, layer by layer powder coating and melting, to manufacture advanced technology of parts (parts). This technology can be used to directly form parts (parts) that are hollow, thin-walled, complex in shape, and lattice topology. The melting scanning speed of laser selective melting forming technology usually reaches 500mm / s~2000mm / s, the thickness of single layer powder is 20μm~100μm, and the scanning melting depth (pitch)~170μm. The cooling rate after powder ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/02B22F9/08B33Y70/00
CPCC22C21/02B22F9/082B33Y70/00
Inventor 唐鹏钧何天兵何晓磊李沛勇陈军洲
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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