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A kind of sicp/al-si-cu composite powder material and preparation method

An al-si-cu, composite powder technology, applied in metal processing equipment, transportation and packaging, etc., can solve the problems affecting the performance of powder metallurgy formed products, difficult to control powder particle size, poor interface bonding performance, etc., to improve flow Properties and physical and chemical properties, reducing surface impurities, reducing the effect of surface tension

Active Publication Date: 2022-05-10
NONFERROUS METALLIC OF HEBEI NEW LIZHONG GRP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, at present, the preparation of silicon carbide aluminum alloy composite material powder is basically made by mixing two kinds of material powder, or it is formed by double nozzle gas atomization, or it is solidified and casted. There are many defects in the above method: such as silicon carbide The bonding performance with the aluminum alloy matrix interface is poor, the dispersion of the two powders is high; the powder particle size is difficult to control; the powder oxygen content is high; the Si particle size is large; the sphericity is poor and other problems, which directly lead to its chemical composition, density, The process performance such as particle size distribution and fluidity is reduced, which will eventually affect the performance of powder metallurgy formed products. Therefore, it is necessary to provide a SiCp / Al-Si-Cu that directly prepares the final shape, high purity, high performance, fine particle size and good interface bonding. Composite powder preparation method is very necessary

Method used

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  • A kind of sicp/al-si-cu composite powder material and preparation method
  • A kind of sicp/al-si-cu composite powder material and preparation method
  • A kind of sicp/al-si-cu composite powder material and preparation method

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preparation example Construction

[0036] The embodiment of the present invention provides a method for preparing SiCp / Al-Si-Cu composite material powder with high purity, high performance and fine particle size, which includes the following steps:

[0037] S1, SiCp / Al-Si-Cu composite material composition design:

[0038] In S1, increase Si and Cu content to improve fluidity and mechanical properties; add Mg, Sb, P elements to modify and improve wettability; add Zr element to refine grains; in order to meet low expansion, wear resistance and other properties , add the SiCp component. Raw materials include: Si: 5-20%; Cu: 0.2-6%; Mg: 0.1-3.0%; Sb: 0.01-0.20%; Zr: 0.05-0.80%; Fe: 0.20-0.80%; : 0.05-0.50%, the rest is Al. The mass ratio of SiCp to Al-Si-Cu is (1:2)-(1:20).

[0039] S2, SiC powder pretreatment:

[0040] In S2, put 10-150 μm national standard silicon carbide powder into a container filled with acetone, and clean it in an ultrasonic cleaner. Cleaning time: 10-40min, heating temperature: 45-55°C,...

Embodiment 1

[0048] This embodiment provides a method for preparing a high-purity, high-performance, fine-grained SiCp / Al-Si-Cu composite material powder, the steps are as follows:

[0049] S1. Composition design of SiCp / Al-Si-Cu composite material, Al-Si-Cu components are calculated by mass fraction, raw materials include: Si: 5.0%; Cu: 6.0%; Mg: 0.1%; Sb: 0.20%; Zr : 0.80%; Fe: 0.20%; P: 0.05%, the balance is Al, and the mass ratio of SiCp to Al-Si-Cu components is 1:15.

[0050] S2. Add 10 μm national standard silicon carbide powder into a container filled with acetone, and clean it in an ultrasonic cleaning machine. The cleaning time is 10 minutes, the heating temperature is 50°C, the vibration frequency is 15khz, and then ultrasonic cleaning is performed twice with distilled water. dry.

[0051] S3, at first the AlSiCu alloy ingot that does not contain Sb, Mg, P, Zr element is melted at 680 ℃; After melting, add Al-Sb master alloy, Al-Zr master alloy, high-purity magnesium successiv...

Embodiment 2

[0055] This embodiment provides a high-purity, high-performance, fine-grain SiCp / Al-Si-Cu composite powder preparation method, the steps are as follows:

[0056] S1, SiCp / Al-Si-Cu composite composition design: Si: 9.5%; Cu: 3.0%; Mg: 1.0%; Sb: 0.1%; Zr: 0.25%; Fe: 0.5%; The amount is Al, and the mass ratio of SiCp to Al-Si-Cu components is 1:3.

[0057] S2. Add 70 μm national standard silicon carbide powder into a container filled with acetone, and clean it in an ultrasonic cleaning machine. Cleaning time: 20min, heating temperature: 53°C, vibration frequency 30khz. Ultrasonic cleaning was performed three times with distilled water, and then dried in a drying oven after cleaning. First at 65°C for 35 minutes, then at 300°C for 80 minutes to perform double-stage drying.

[0058] S3, first melt the AlSiCu alloy ingot without Sb, Mg, P, Zr elements at 720 ° C; after melting, add Al-Sb master alloy, Al-Zr master alloy, high-purity magnesium (adding temperature 760 °C) through a...

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Abstract

The invention discloses a SiCp / Al-Si-Cu composite powder material and a preparation method thereof, comprising the following steps: S1, first designing the composition of the SiCp / Al-Si-Cu composite material; S2, pretreating the SiC powder, Improve the wettability of SiCp and aluminum alloy melt; S3, melt the alloy, after melting, add SiCp at 580-700°C, stir evenly, and realize SiCp / Al-Si-Cu interface bonding; S4, carry out melt and Control of production process such as atomization parameters, preparation of powder. It breaks through the difficulty of directly preparing SiCp / Al‑Si‑Cu composite material powders, and can prepare powders with high purity, high sphericity, controllable particle size distribution, and uniform mixing, with excellent physical properties, process properties and mechanical properties of finished products , which can meet the demand of powder metallurgy process for powder technology.

Description

technical field [0001] The invention relates to the technical field of alloy powder preparation, in particular to a SiCp / Al-Si-Cu composite powder material and a preparation method. Background technique [0002] With the development of automotive cylinder heads, pistons, cylinders and other components in the direction of lightweight, high power, high performance, and low energy consumption, it is particularly important to use reasonable manufacturing materials, which will help improve the efficiency of the engine and extend its service life. Reduce noise and exhaust pollution, etc. [0003] Since Al-Si-Cu alloy has low density, good thermal conductivity, good friction reduction, wear resistance, and good workmanship; silicon carbide has the advantages of low expansion and high rigidity, and the combination of the two can meet the requirements of specific gravity reduction. Requirements for lower coefficient of linear expansion, corresponding improvement in wear resistance a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/04C22C29/06C22C32/00C22C1/10B22F9/08B22F1/065C22C1/03
CPCC22C21/04C22C32/0063C22C29/065C22C29/067C22C1/1036C22C1/1005B22F9/082B22F1/065C22C1/1047
Inventor 李海军宗福春胡增武臧立根李作平左李庆刘永昌苑高利韩广普韩艳
Owner NONFERROUS METALLIC OF HEBEI NEW LIZHONG GRP CO LTD
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