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Method for preparing high-strength aluminum-copper aluminum alloy

An aluminum alloy, high-strength technology, applied in the field of aluminum alloy design, can solve problems such as difficult mechanical properties, increased material costs, and guaranteed tensile strength, so as to improve casting performance and mechanical properties, improve material comprehensive properties, and excellent performance Effect

Inactive Publication Date: 2019-01-11
LANZHOU FLIGHT CONTROL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In China, there are also self-developed aluminum-copper casting aluminum alloy materials with Mn and Mg as strengthening elements at the same time, but most of them have high content of alloying elements, which increases the cost of materials, and it is difficult to ensure the tensile strength above 480MPa and elongation at the same time for mechanical properties. more than 10%

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The preparation method of a high-strength aluminum-copper-based aluminum alloy proposed in the first embodiment of the present invention is as follows:

[0027] (1) Alloy ingredients

[0028] The content by weight percentage is: 5.1% copper, 0.8% manganese, 0.3% titanium, 0.35% magnesium, 0.1% RE (rare earth), 0.13% zirconium, 0.12% iron, 0.08% silicon, 0.07% zinc, and the remaining impurities are 0.35% , the aluminum balance is used to calculate the ingredients.

[0029] (2) Alloy melting

[0030] The total weight required for smelting is 100Kg, which is calculated and prepared from 99.90% semi-finished aluminum ingots, aluminum-titanium master alloys, JCMn98 metal manganese and No. 1 standard copper configuration aluminum-titanium-manganese-copper master alloy ingots;

[0031] Add 75Kg of aluminum ingots and melt them in a melting furnace at 760°C. After all of them are melted, add the configured aluminum-titanium-manganese-copper master alloy ingots, aluminum-zirco...

Embodiment 2

[0038] A high-strength cast aluminum alloy material proposed in the second embodiment of the present invention, its composition by weight percentage is: 4.8% copper, 0.8% manganese, 0.25% titanium, 0.3% magnesium, 0.11% RE (rare earth), 0.18% Zirconium, 0.18% iron, 0.09% silicon, 0.15% zinc, the remaining impurities are 0.46%, and the balance of aluminum.

[0039] The casting process of a high-strength cast aluminum alloy material proposed in this example is except that the alloy ingredients are calculated according to the weight percentage of the constituent elements in this example, and the casting process of alloy melting and casting heat treatment is the same as that of the first example above. The aluminum alloy standard test bar composed of elements in mass percent has a tensile strength of 502Mpa, a yield strength of 359Mpa, an elongation of 14.5%, and a Brinell hardness greater than 126.

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Abstract

The invention belongs to the field of aluminum alloy designs and in particular relates to a method for preparing a high-strength aluminum-copper aluminum alloy. At present, the common high-strength cast aluminum alloy mainly belongs to Al-Cu series, although the cast aluminum alloy has high strength, properties such as tensile strength of 480MPa or higher and ductility of more than 10% or higher are difficultly achieved. The invention provides a preparation method of an aluminum-copper aluminum alloy with excellent casting property and mechanical property. The aluminum-copper aluminum alloy comprises the following components in percentage by weight: 4.3-5.2% of Cu, 0.6-1.0% of Mn, 0.15-0.34% of Ti, 0.35-0.40% of Mg, 0.05-0.15% of RE, 0.05-0.2% of Zr, less than 0.2% of Fe, less than 0.1% ofSi, less than 0.2% of Zn, less than 0.5% of other impurities and the balance of aluminum. According to the technical scheme, the cast aluminum alloy produced by the method has excellent overall performance, and the material cost is low.

Description

technical field [0001] The invention belongs to the field of aluminum alloy design, and in particular relates to a method for preparing a high-strength aluminum-copper series aluminum alloy. Background technique [0002] As a traditional metal material, cast aluminum alloy has the characteristics of low specific gravity, high specific strength, easy processing, low cost, flexible and simple production parts, and easy mass production. It is widely used in aviation, aerospace, automobile, machinery and other industries. With the development of modern industry, there is an increasing demand for cast aluminum alloys, especially for cast aluminum alloys with comprehensive mechanical properties of high tensile strength and elongation and low cost. [0003] At present, the common high-strength cast aluminum alloys are mainly Al-Cu series, and the typical ones include my country's ZL205A alloy, French brand A-U5GT alloy, and American Aluminum Association brand A201.0 and 206.0 alloy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/03C22C21/14C22C21/16C22C21/18C22F1/057
CPCC22C1/026C22C1/03C22C21/14C22C21/16C22C21/18C22F1/057
Inventor 杨世林冯延泽何金宝王丰足
Owner LANZHOU FLIGHT CONTROL