Fe-Be-contained heat-resisting aluminum copper alloy and manufacturing method of Fe-Be-contained heat-resisting aluminum copper alloy

A heat-resistant aluminum and copper alloy technology, applied in the field of metal material engineering, can solve the problems of low high-temperature instantaneous strength and high-temperature durable strength, so as to improve grain boundary strength and creep resistance, improve heat resistance stability, strength and Effect of heat resistance improvement

Inactive Publication Date: 2016-03-30
LIAONING TECHNICAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In the field of heat-resistant aluminum alloy research, there are still problem

Method used

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  • Fe-Be-contained heat-resisting aluminum copper alloy and manufacturing method of Fe-Be-contained heat-resisting aluminum copper alloy

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Experimental program
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Effect test

Embodiment 1

[0028] The present invention contains Fe-Be heat-resistant aluminum-copper alloy, and its chemical composition is: Cu: 7%, Mn: 0.6%, Ni: 0.6%, Cr: 0.4%, Fe: 0.35%, Be: 0.4%. V: 0.3%, Ti: 0.25%, B: 0.01%, Ce: 2.8%, La: 1.8%, and the balance is Al and unavoidable impurities.

[0029] The preparation method of the present invention contains Fe-Be heat-resistant aluminum-copper alloy, comprises the steps:

[0030] Step 1, smelting:

[0031] Put the aluminum-chromium master alloy into the crucible, heat it to 920°C, and after it is completely melted, lower the furnace temperature to 790°C;

[0032] According to the set alloy composition, add aluminum copper master alloy, aluminum manganese master alloy, aluminum iron master alloy, aluminum nickel master alloy, aluminum beryllium master alloy, aluminum vanadium master alloy, aluminum titanium boron master alloy, aluminum rare earth master alloy and aluminum , after more than 2 / 3 of the charge is melted, add HZ-WYF smokeless coveri...

Embodiment 2

[0042] The present invention contains Fe-Be heat-resistant aluminum-copper alloy, and its chemical composition is as follows according to weight percentage: Cu: 6.5%, Mn: 0.65%, Ni: 0.55%, Cr: 0.35%, Fe: 0.4%, Be: 0.35%, V: 0.25%, Ti: 0.2%, B: 0.012%, Ce: 2.6%, La: 1.6%, and the balance is Al and unavoidable impurities.

[0043] The preparation method of the present invention contains Fe-Be heat-resistant aluminum-copper alloy, comprises the steps:

[0044] Step 1, smelting:

[0045] Put the aluminum-chromium master alloy into the crucible, heat it to 925°C, and after it is completely melted, lower the furnace temperature to 790°C;

[0046] According to the set alloy composition, add aluminum copper master alloy, aluminum manganese master alloy, aluminum iron master alloy, aluminum nickel master alloy, aluminum beryllium master alloy, aluminum vanadium master alloy, aluminum titanium boron master alloy, aluminum rare earth master alloy and aluminum , after more than 2 / 3 of t...

Embodiment 3

[0056] The present invention contains Fe-Be heat-resistant aluminum-copper alloy, and its chemical composition is as follows according to weight percentage: Cu: 6.0%, Mn: 0.55%, Ni: 0.65%, Cr: 0.3%, Fe: 0.35%, Be: 0.3%, V: 0.2%, Ti: 0.22%, B: 0.013%, Ce: 2.9%, La: 1.7%, and the balance is Al and unavoidable impurities.

[0057] The preparation method of the present invention contains Fe-Be heat-resistant aluminum-copper alloy, comprises the steps:

[0058] Step 1, smelting:

[0059] Put the aluminum-chromium master alloy into the crucible, heat it to 930°C, and after it is completely melted, lower the furnace temperature to 800°C;

[0060] According to the set alloy composition, add aluminum copper master alloy, aluminum manganese master alloy, aluminum iron master alloy, aluminum nickel master alloy, aluminum beryllium master alloy, aluminum vanadium master alloy, aluminum titanium boron master alloy, aluminum rare earth master alloy and aluminum , after more than 2 / 3 of th...

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Abstract

The invention provides Fe-Be-contained heat-resisting aluminum copper alloy and a manufacturing method of the Fe-Be-contained heat-resisting aluminum copper alloy, and belongs to the field of metallic material engineering. The Fe-Be-contained heat-resisting aluminum copper alloy comprises, by weight percentage, 6%-7% of Cu, 0.5%-0.7% of Mn, 0.5%-0.7% of Ni, 0.3%-0.4% of Cr, 0.3%-0.4% of Fe, 0.3-0.4% of Be, 0.2%-0.3% of V, 0.15%-0.25% of Ti, 0.01%-0.015% of B, 2.5%-3% of Ce, 1.5%-2% of La and the balance Al and inevitable impurities. The manufacturing method includes the steps of firstly, smelting, wherein an aluminum-chromium intermediate alloy is added to be molten and cooled, other alloys and aluminum are added in the form of the intermediate alloy, a covering agent is added, and an aluminum refining agent is added after the temperature is constant; secondly, casting; and thirdly, solid solution and aging treatment. According to the Fe-Be-contained heat-resisting aluminum copper alloy, the room temperature, the high-temperature strength and the high-temperature permanence performance are improved remarkably after the Fe-Be-contained heat-resisting aluminum copper alloy is subjected to multi-alloying and heat treatment; the instant tensile strength is as high as 258 MPa to 264 MPa at the temperature being 250 DEG C; and the tensile strength ranges from 213 MPa to 223 MPa after the alloy is heated for 200 hours at the temperature being 200 DEG C, and the tensile strength ranges from 185 MPa to 192 MPa after the alloy is heated for 200 hours at the temperature being 250 DEG C.

Description

technical field [0001] The invention belongs to the field of metal material engineering, in particular to a heat-resistant aluminum-copper alloy containing Fe-Be and a preparation method thereof. Background technique [0002] At present, aluminum and aluminum alloys are metal materials second only to steel, and are widely used in construction, energy, transportation, aerospace and other fields. The application and research of aluminum and aluminum alloy materials have also been developed rapidly, and various aluminum alloys are widely used. [0003] Heat-resistant aluminum-copper alloys have a problem of high thermal cracking tendency in the casting process. The main reason is that the composition range of Cu, the main element of the alloy, is usually selected in the range of 4.5-5.5% in order to achieve the maximum strengthening effect. The alloy crystallization temperature range Wider, it provides sufficient conditions for the development of anisotropic dendrites during c...

Claims

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Application Information

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IPC IPC(8): C22C21/12C22C1/03C22F1/057C22C1/06
CPCC22C1/026C22C1/03C22C1/06C22C21/12C22F1/002C22F1/057
Inventor 李明伟杨绍斌孟媛媛张光
Owner LIAONING TECHNICAL UNIVERSITY
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