Method for preparing aluminum alloy component through powder metallurgy method

A powder metallurgy, aluminum alloy technology, applied in metal processing equipment, transportation and packaging, etc., can solve the problem of inability to prepare high-performance powder metallurgy aluminum alloy products, poor performance and near-net forming ability, long production process cycle, etc. problem, to achieve the effect of optimizing the alloy composition range, low price and reducing raw material cost

Active Publication Date: 2018-03-23
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] There are still some problems in the above-mentioned research and production: First, most of the aluminum alloy composition is obtained through the adjustment of the existing wrought aluminum alloy composition. At present, its powder metallurgy products are mainly used under low stress conditions, and its performance and near-net forming The ability of the powder metallurgy aluminum alloy products is poor, and high-performance powder metallurgy aluminum alloy products cannot be prepared; secondly, the raw material powders used are alloy powders, and the preparation cost of the raw material powders is relatively high
In addition, the above-mentioned research and production process, the heat treatment method is to heat up to the solid solution temperature after sintering is completed, and the entire production process has a long cycle and high energy consumption, resulting in a further increase in production costs.

Method used

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  • Method for preparing aluminum alloy component through powder metallurgy method
  • Method for preparing aluminum alloy component through powder metallurgy method
  • Method for preparing aluminum alloy component through powder metallurgy method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1: A kind of method that adopts powder metallurgy method to prepare aluminum alloy part, concrete steps are as follows:

[0027] a. Proportion the raw material powder used according to the following mass fraction and median diameter, add amide wax C wax with a mass fraction of 1.5% as a lubricant, and then mix on a mixer for 30 minutes to obtain a uniformly mixed powder;

[0028] The mass percent and median diameter of each raw material powder used are as follows:

[0029]

[0030] b. the powder obtained in step a is pressed under a pressing pressure of 300MPa to obtain a circular green body with a diameter of 30mm;

[0031] c. Carry out sintering-solution treatment of the formed body obtained in step b under a nitrogen atmosphere. The specific process parameters are: 300°C (degreasing temperature) for 20min, 460°C for 20min, 560°C for 20min, 600°C for 50min, and heat up The speed is 2°C / min, then the temperature is lowered to 520°C, held for 120 minutes ...

Embodiment 2

[0035] Embodiment 2: A kind of method that adopts powder metallurgy method to prepare aluminum alloy part, concrete steps are as follows:

[0036] a. Proportion the raw material powder used according to the following mass fraction and median diameter, add amide wax C wax with a mass fraction of 1.5%wt as a lubricant, and then mix on a mixer for 60 minutes to obtain a uniformly mixed powder ;

[0037] The mass percentage, median diameter, and sintering density of Al at different median diameters of each raw material powder used are as follows:

[0038]

[0039] b. the powder obtained in step a is pressed under a pressing pressure of 300MPa to obtain a circular green body with a diameter of 30mm;

[0040] c. Carry out sintering-solution treatment of the formed body obtained in step b under a nitrogen atmosphere. The specific process parameters are: 300°C (degreasing temperature) for 40min, 460°C for 40min, 560°C for 50min, 600°C for 240min, heat up The speed is 8°C / min, and...

Embodiment 3

[0044] Embodiment 3: a kind of method that adopts powder metallurgy method to prepare aluminum alloy part, concrete steps are as follows:

[0045] a. Proportion the raw material powder used according to the following mass fraction and median diameter, add amide wax C wax with a mass fraction of 1.5%wt as a lubricant, and then mix on a mixer for 45 minutes to obtain a uniformly mixed powder ;

[0046] The mass percent and median diameter of each raw material powder used are as follows:

[0047]

Mg

Si

Cu

sn

Al

Quality score (%)

1.50

0.8

4.0

0.5

93.2

Median diameter (μm)

75

32

45

27

75

[0048] b. pressing the powder obtained in step a under a pressing pressure of 300 MPa to obtain a circular green body with a diameter of 30 mm;

[0049] c. Carry out sintering-solution treatment of the shaped green body obtained in step b under a nitrogen atmosphere, wherein the heating rate of the whole process is 5°C...

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Abstract

The invention relates to a method for preparing an aluminum alloy component through a powder metallurgy method, and belongs to the technical field of preparing aluminum alloy components through the powder metallurgy method. According to the preparation method, after pure Al powder and three kinds of alloy element powder or binary alloy powder of Mg, Si and Cu are mixed uniformly according to a certain proportion, the aluminum alloy component is obtained through the processes of press forming, sintering, heat treatment, subsequent surface treatment and the like. According to the method, the pure aluminum powder is use as the main raw material, and an aluminum alloy system suitable for a pressing-sintering process is developed; and the sintering-heat treatment integrated production process is studied, the production process is simplified, the production efficiency is improved, and the production cost is reduced. The density of an aluminum alloy material prepared through the method is higher than 98%, the tensile strength of the aluminum alloy material is larger than 300 MPa, and the ductility of the aluminum alloy material is about 5%.

Description

technical field [0001] The invention relates to a method for preparing aluminum alloy parts by powder metallurgy, and belongs to the technical field of preparing metal parts by powder metallurgy. Background technique [0002] Aluminum alloy has low density, high specific strength, good plasticity, excellent electrical conductivity, thermal conductivity and corrosion resistance, and is widely used in aerospace, electronic power, construction and other industrial fields. The powder metallurgy process is a near-net shape preparation method for parts. The prepared products do not require or only require a small amount of machining. It is an energy-saving, resource-saving and low-cost parts processing technology. Powder metallurgy aluminum alloy combines the dual advantages of aluminum alloy and powder metallurgy, making powder metallurgy aluminum alloy widely used. In recent years, with the improvement of people's awareness of environmental protection, the lightweight of automo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/16C22C1/04C22F1/057B22F3/10B22F3/24
CPCC22C1/0416C22C21/14C22C21/16C22F1/057B22F3/1007B22F3/1021B22F3/24B22F2999/00B22F2998/10B22F2003/248B22F2201/02B22F1/10B22F3/02
Inventor 吴茂邱婷婷杜智渊曲选辉
Owner UNIV OF SCI & TECH BEIJING
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