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Al-Zn-Mg-Fe series aluminum alloy material and preparation method and application thereof

An aluminum alloy material and aluminum alloy technology, applied in the field of aluminum alloy materials, can solve problems such as high temperature resistance and creep resistance, and achieve the effects of improving thermal stability, increasing volume fraction, and narrowing the solidification interval

Active Publication Date: 2021-10-15
NEW MATERIAL INST OF SHANDONG ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the rapid development of the aerospace and automobile industries, higher requirements are placed on the heat resistance of aluminum alloys. At present, the pistons, cylinder liners, connecting rods and other parts of the engine are required to serve for a long time at high temperatures above 300 °C. conditions and bear sufficient load and thermal fatigue, the existing Al-Zn-Mg series aluminum alloy materials are difficult to meet the realistic and demanding requirements such as high temperature resistance and creep resistance.

Method used

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  • Al-Zn-Mg-Fe series aluminum alloy material and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0046] In this embodiment, an Al-Zn-Mg-Fe aluminum alloy material is composed of the following raw material mass ratios: Zn: 7.1%, Mg: 2.6%, Fe: 0.8%, Ce: 0.6%, Y: 0.6 %, Zr: 0.2%, Er: 0.2%, and the balance is Al.

[0047] 1) Weigh A00 standard aluminum, pure Zn, pure Mg and Al-20% Fe, Al-20% Ce, Al-25% Y, Al-5% Zr, Al-20% Er master alloy according to the mass ratio;

[0048] 2) The raw material is smelted with aluminum alloy at 850°C, then hexachloroethane is pressed into the bell jar for degassing, and then the slag is removed and refined at 740°C. After refining, it is left to stand for 35 minutes, cooled to 710°C, and cast.

[0049] 3) The aluminum alloy material is subjected to 350°C / 24h+460°C / 26h+520°C / 8h multi-stage solution treatment, and after rapid quenching, it is subjected to 24h aging treatment at 120°C.

[0050] 4) According to the GB / T228.1-2010 standard, samples were taken for room temperature and high temperature performance tests, and the test performance is...

Embodiment 2

[0052] In this embodiment, an Al-Zn-Mg-Fe aluminum alloy material is composed of the following raw material mass ratios: Zn: 6.5%, Mg: 2.1%, Fe: 0.6%, Ce: 0.6%, Nd: 0.6 %, Zr: 0.2%, Er: 0.2%, and the balance is Al.

[0053] 1) Weigh A00 standard aluminum, pure Zn, pure Mg and Al-20% Fe, Al-20% Ce, Al-30% Nd, Al-5% Zr, Al-20% Er master alloy according to the mass ratio;

[0054] 2) The raw material is smelted with aluminum alloy at 800°C, then hexachloroethane is pressed into the bell jar for degassing, and then the slag is removed and refined at 745°C. After refining, it is left to stand for 30 minutes, cooled to 720°C, and cast.

[0055] 3) The aluminum alloy material is subjected to 360°C / 26h+470°C / 26h+530°C / 6h multi-stage solution treatment, and after rapid quenching, it is subjected to 28h aging treatment at 120°C.

[0056] 4) According to the GB / T228.1-2010 standard, samples were taken for room temperature and high temperature performance tests, and the test performance ...

Embodiment 3

[0058] In this embodiment, an Al-Zn-Mg-Fe aluminum alloy material is composed of the following raw material mass ratios: Zn: 6.7%, Mg: 2.2%, Fe: 1%, Y: 0.7%, Nd: 0.6 %, Zr: 0.2%, Yb: 0.2%, and the balance is Al.

[0059] 1) Weigh A00 standard aluminum, pure Zn, pure Mg and Al-20% Fe, Al-20% Y, Al-30% Nd, Al-5% Zr, Al-20% Yb master alloys according to the mass ratio;

[0060] 2) The raw material is smelted with aluminum alloy at 850°C, then hexachloroethane is pressed into the bell jar for degassing, and then the slag is removed and refined at 740°C.

[0061] 3) The aluminum alloy material is subjected to 370°C / 20h+450°C / 26h+510°C / 9h multi-stage solution treatment, and after rapid quenching, it is subjected to 20h aging treatment at 130°C.

[0062] 4) According to the GB / T228.1-2010 standard, samples were taken for room temperature and high temperature performance tests, and the test performance is shown in Table 1.

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Abstract

The invention belongs to the field of aluminum alloy materials, and particularly relates to an Al-Zn-Mg-Fe series aluminum alloy material and a preparation method and application thereof. The Al-Zn-Mg-Fe series aluminum alloy material comprises the following basic alloy elements in percentage by weight: 6.5%-15% of Zn, 1.4%-4.5% of Mg, 0.3%-1.5% of Fe, 0.6%-14.8% of eutectic elements and the balance of Al; and the eutectic element is one or more of Ce, Y, Nd, Ca, Ni and Co. The Al-Zn-Mg-Fe series aluminum alloy material has the performance advantages of an existing Al-Zn-Mg series aluminum alloy, and the alloy manufacturing cost is greatly reduced. The alloy not only can be used for casting aluminum alloy, but also can be used for wrought aluminum alloy, has very excellent high-temperature resistance, and the traditional cognition that Al-Zn-Mg series alloys are not heat-resistant is broken through.

Description

technical field [0001] The invention belongs to the field of aluminum alloy materials, and in particular relates to an Al-Zn-Mg-Fe aluminum alloy material and a preparation method and application thereof. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] Energy shortage and environmental pollution are prominent problems in today's world. Lightening one's own weight has become an effective way to reduce environmental pollution and save energy in the fields of automobiles and aerospace. According to statistics, for every 1 kg reduction in car quality, 1L of gasoline can make the car travel 0.011km more. At the same time, the weight reduction of automobiles not only reduces f...

Claims

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Application Information

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IPC IPC(8): C22C21/10C22C1/03C22C1/06C22F1/053
CPCC22C21/10C22C1/026C22C1/03C22C1/06C22F1/053C22F1/002
Inventor 周吉学刘洪涛晁延吉张素卿王娜娜程开明吴建华刘运腾王西涛
Owner NEW MATERIAL INST OF SHANDONG ACADEMY OF SCI