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Preparation method of high-strength cast aluminum alloy

A technology for casting aluminum alloys and aluminum alloys, which is applied in the field of aluminum alloys, can solve the problems that the microstructure uniformity of cast aluminum alloys has not been found to be effective, and achieve the effects of good strength and toughness matching, increased production, and uniform microstructure

Active Publication Date: 2016-08-24
CHINA WEAPON SCI ACADEMY NINGBO BRANCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The existing technology mainly improves various performances of cast aluminum alloys from the improvement of component composition and its ratio combined with the process, but no effective method has been found on how to improve the uniformity of the microstructure of cast aluminum alloys

Method used

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  • Preparation method of high-strength cast aluminum alloy
  • Preparation method of high-strength cast aluminum alloy
  • Preparation method of high-strength cast aluminum alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Example 1, aluminum alloy components and their weight ratio: 5.00% Zn, 4.00% Ni, 1.50% Mg, 2.80% Cu, 0.20% Mn, 0.15% Cr, and the rest is Al. The alloy preparation steps are as follows:

[0029] Configure 30kg of alloy according to the composition requirements, and heat it at 720°C after melting;

[0030] The alloy melt is treated by the rotary injection method for 10 minutes;

[0031] Adding 0.2% by weight of TiC nano-ceramic particles, the particle size distribution range of the nano-ceramic particles is 50-200nm;

[0032] The melt is subjected to power ultrasonic treatment, the ultrasonic power is 500W, the melt treatment temperature is 680°C, and the treatment time is 3min;

[0033] Cast at 720°C by squeeze casting method;

[0034] The casting cast alloy is subjected to solid solution treatment, specifically 465°C / 6h+500°C / 3h, and finally cooled by water quenching;

[0035] The alloy after solution treatment is subjected to aging treatment, specifically 120°C / 4h+1...

Embodiment 2

[0037] Example 2, aluminum alloy components and their weight ratios: 7.00% Zn, 4.50% Ni, 1.50% Mg, 1.40% Cu, 0.20% Mn, 0.15% Cr, 0.02% Sc and the rest being Al. The alloy preparation steps are as follows: Configure 100kg of alloy according to the composition requirements, and heat it at 690°C after melting;

[0038] The alloy melt is processed by the rotary injection method for 30 minutes;

[0039] Adding 0.6% by weight of TiC nano-ceramic particles, the particle size distribution range of the nano-ceramic particles is 50-200nm;

[0040] The melt is subjected to power ultrasonic treatment, the ultrasonic power is 800W, the melt treatment temperature is 700°C, and the treatment time is 3min;

[0041] Casting at 700°C by gravity sand casting method;

[0042] The casting cast alloy is subjected to solid solution treatment, specifically 465°C / 6h+500°C / 3h, and finally cooled by water quenching;

[0043] The alloy after solution treatment is subjected to aging treatment, specific...

Embodiment 3

[0045] Example 3, aluminum alloy components and their weight ratio: 6.00% Zn, 4.50% Ni, 2.40% Mg, 1.80% Cu, 0.20% Mn, 0.15% Cr, and the rest is Al. The alloy preparation steps are as follows:

[0046] Configure alloy 300kg according to the composition requirements, and heat it at 690°C after melting;

[0047] The alloy melt is processed by the rotary injection method for 30 minutes;

[0048] Adding 0.6% by weight of TiC nano-ceramic particles, the particle size distribution range of the nano-ceramic particles is 50-200nm;

[0049] The melt is subjected to power ultrasonic treatment, the ultrasonic power is 1000W, the melt treatment temperature is 700°C, and the treatment time is 3min;

[0050] Casting at 700°C by low-pressure casting method;

[0051] The casting cast alloy is subjected to solid solution treatment, specifically 465°C / 6h+500°C / 3h, and finally cooled by water quenching;

[0052] The alloy after solution treatment is subjected to aging treatment, specifically 1...

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Abstract

A preparation method of high-strength cast aluminum alloy is characterized in that the cast aluminum alloy comprises the following components: Al, Zn, Ni, Mg, Cu, Mn, Cr and the like; the method comprises the following steps: configuration and melting of alloy; rotary injection treatment; adding of nano-scale ceramic particles; ultrasonic treatment; melt casting; solution treatment; aging treatment. Compared with the prior art, the preparation method has the advantages that the prepared high-strength cast aluminum alloy is uniform in microstructure, and excellent in combination of strength and toughness; due to the adoption of nano-particle modification and power ultrasound treatment, the problems of thick second solidification phase and non-uniform distribution in aluminum alloy casting are solved.

Description

technical field [0001] The invention relates to a method for preparing an aluminum alloy, belonging to the technical field of aluminum alloys. Background technique [0002] In recent years, with the development of science and technology, under the combined effect of demand traction and technology promotion, my country has successively completed the technological update and upgrading of various equipment, and achieved remarkable benefits. The role of new materials is particularly critical. [0003] Cast aluminum alloy has good specific strength and casting performance, and is widely used in aviation, aerospace, weapons, shipbuilding, automobiles, rail transit, instruments, chemicals and electrical appliances and other industrial fields. Al-Si, Al-Mg, Al-Cu and other casting aluminum alloys play a key role in the manufacturing and forming of common parts and various key high-performance complex casting parts according to their mechanical properties and process characteristics....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/02C22C21/10C22C21/00
Inventor 徐永东邵志文朱秀荣王军王荣郭红燕
Owner CHINA WEAPON SCI ACADEMY NINGBO BRANCH
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