Heat-resisting aluminum alloy and preparation method thereof

An aluminum alloy and heat-resistant technology, applied in the field of aluminum alloy materials, can solve the problems of poor heat resistance of aluminum alloys, and achieve the effects of good room temperature mechanical properties, good solid solution strengthening and precipitation strengthening effects, and good precipitation strengthening effects.

Inactive Publication Date: 2018-04-20
LIAONING ZHONGDA ALUMINUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] One of the purposes of the present invention is to solve the problem of poor heat resistance of aluminum alloys in the prior art, and to p...

Method used

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  • Heat-resisting aluminum alloy and preparation method thereof
  • Heat-resisting aluminum alloy and preparation method thereof
  • Heat-resisting aluminum alloy and preparation method thereof

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Effect test

Embodiment 1

[0033] Heat-resistant aluminum alloy, composed of the following components in mass percentage: 5% Zn, 2% Mg, 1% Cu, 0.3% Sm, the balance being Al and unavoidable impurities.

[0034] The preparation method of the above-mentioned heat-resistant aluminum alloy comprises the following steps:

[0035] (1) Put pure aluminum, pure zinc, pure magnesium, pure copper and the master alloy Mg-25Sm in a drying oven at 200°C in proportion to dry and preheat for 1 hour;

[0036] (2) Melt the preheated pure aluminum, pure zinc, pure magnesium, and pure copper, add the master alloy Mg-25Sm when heated to 710°C, keep the temperature for 10 minutes, and remove the surface scum after the alloy is completely melted; raise the temperature to Stop heating after 730°C, then stir evenly, then lower the temperature to 690°C and keep it warm for 5 minutes to obtain alloy liquid;

[0037] (3) Pouring the alloy liquid obtained in step (2) into the preheated metal mold to obtain the cast alloy; the prehe...

Embodiment 2

[0041] The heat-resistant aluminum alloy is composed of the following components in mass percentage: 5.5% Zn, 3.5% Mg, 1.5% Cu, 0.4% Sm, and the balance is Al and unavoidable impurities.

[0042] The preparation method of the above-mentioned heat-resistant aluminum alloy comprises the following steps:

[0043] (1) Put pure aluminum, pure zinc, pure magnesium, pure copper and the master alloy Mg-25Sm in a 190°C drying oven in proportion to dry and preheat for 1.5 hours;

[0044] (2) Melt the preheated pure aluminum, pure zinc, pure magnesium, and pure copper, and when heated to 720°C, add the intermediate alloy Mg-25Sm, keep it warm for 10 minutes, and remove the surface scum after the alloy is completely melted; raise the temperature Stop heating after reaching 740°C, then stir evenly, then lower the temperature to 700°C and keep it warm for 10 minutes to obtain alloy liquid;

[0045] (3) pouring the alloy liquid obtained in step (2) into the preheated metal mold, so that the p...

Embodiment 3

[0049] The heat-resistant aluminum alloy is composed of the following components in mass percentage: 6% Zn, 3% Mg, 2% Cu, 0.5% Sm, the balance being Al and unavoidable impurities.

[0050] The preparation method of the above-mentioned heat-resistant aluminum alloy comprises the following steps:

[0051] (1) Put pure aluminum, pure zinc, pure magnesium, pure copper and the master alloy Mg-25Sm in a drying oven at 180°C in proportion to dry and preheat for 2 hours;

[0052] (2) Melt the preheated pure aluminum, pure zinc, pure magnesium, and pure copper, add the master alloy Mg-25Sm when heated to 700°C, keep the temperature for 10 minutes, and remove the surface scum after the alloy is completely melted; raise the temperature to Stop heating after 735°C, then stir evenly, then lower the temperature to 695°C and keep it warm for 8 minutes to obtain alloy liquid.

[0053] (3) pouring the alloy liquid obtained in step (2) into the preheated metal mold, so that the preheating temp...

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Abstract

The first purpose of the invention is to solve the problem of poor heat resistance of an aluminum alloy in the prior art and to provide a heat-resisting aluminum alloy, and the second purpose is to provide a preparation method of the heat-resisting aluminum alloy which belongs to the technical field of aluminum alloy materials. The heat-resisting aluminum alloy comprises, by mass, 5-6% of Zn,2-3%of Mg,1-2% of Cu,0.3-0.5% of Sm, the balance Al and unavoidable impurities. The alloy element type of the heat-resisting aluminum alloy is few, the cost is low, the alloy composition is simple, the melting and mixing process is easy to control, and the difficulty of preparation is reduced; the obtained aluminum alloy microstructure is even, precipitation phase is evenly distributed and dispersed,and the high room temperature, high temperature tensile strength and yield intensity are achieved; and the tensile strength at 200 DEG C is more than 586 MPa , the yield strength is more than 521 MPa,meanwhile, the plasticity is also improved greatly, and the high cost performance is achieved.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloy materials, and in particular relates to a heat-resistant aluminum alloy and a preparation method thereof. Background technique [0002] As the lightest metal structural materials in engineering applications, aluminum and aluminum alloys have the advantages of low density, high specific strength and specific stiffness, excellent damping and shock absorption performance, and good heat dissipation. They have significant advantages in many fields of application. At present, commercial aluminum alloys can be basically divided into two categories: cast aluminum alloys and deformed aluminum alloys. 7-series aluminum alloys are widely used due to their low price and good casting process, mainly including 7005, 7050, and 7075 aluminum alloys. Among them, the ultimate tensile strength of 7050-T6 aluminum alloy is 525-545MPa, the ultimate tensile strength of 7075-T6 aluminum alloy is 535-550MPa, and ...

Claims

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Application Information

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IPC IPC(8): C22C21/10C22C1/03C22F1/053
CPCC22C21/10C22C1/026C22C1/03C22F1/002C22F1/053
Inventor 刘艳辉马旭袁柱桐李龙林孙远志
Owner LIAONING ZHONGDA ALUMINUM
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