Heat-resistant aluminum alloy containing Mo-Be and preparation method of heat-resistant aluminum alloy containing Mo-Be

An aluminum alloy, mo-be technology, applied in the field of Mo-Be-containing heat-resistant aluminum alloy and its preparation, can solve the problems of high-temperature instantaneous strength and high-temperature lasting strength, and improve heat-resistant stability, strength and heat resistance. The effect of improving the property, improving the high temperature strength and high temperature durability

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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  • Heat-resistant aluminum alloy containing Mo-Be and preparation method of heat-resistant aluminum alloy containing Mo-Be

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Experimental program
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Effect test

Embodiment 1

[0029] Mo-Be heat-resistant aluminum alloy, its chemical composition according to mass percentage is: Cu: 7%, Mn: 0.6%, Ni: 0.7%, Cr: 0.4%, Be: 0.35%, Mo: 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.

[0030] A method for preparing a heat-resistant aluminum alloy containing Mo-Be, comprising the steps of:

[0031] Step 1, smelting:

[0032] 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;

[0033] According to the set alloy composition, add aluminum-copper master alloy, aluminum-manganese master alloy, aluminum-beryllium master alloy, aluminum-nickel master alloy, aluminum-molybdenum 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 covering agent, the amount of coveri...

Embodiment 2

[0043] The chemical composition of heat-resistant aluminum alloy containing Mo-Be is as follows: Cu: 6.5%, Mn: 0.65%, Ni: 0.55%, Cr: 0.35%, Be: 0.4%, Mo: 0.3%, V: 0.25 %, Ti: 0.2%, B: 0.01%, Ce: 2.5%, La: 2%, and the balance is Al and unavoidable impurities.

[0044] A method for preparing a heat-resistant aluminum alloy containing Mo-Be, comprising the steps of:

[0045] Step 1, smelting:

[0046] 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 780°C;

[0047] According to the set alloy composition, add aluminum-copper master alloy, aluminum-manganese master alloy, aluminum-beryllium master alloy, aluminum-nickel master alloy, aluminum-molybdenum 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 covering agent, the amount of covering ...

Embodiment 3

[0056] Mo-Be heat-resistant aluminum alloy, its chemical composition according to the mass percentage is: Cu: 6%, Mn: 0.7%, Ni: 0.6%, Cr: 0.3%, Be: 0.35%, Mo: 0.3%, V: 0.3 %, Ti: 0.25%, B: 0.015%, Ce: 2.8%, La: 2%, and the balance is Al and unavoidable impurities.

[0057] A method for preparing a heat-resistant aluminum alloy containing Mo-Be, comprising the steps of:

[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-beryllium master alloy, aluminum-nickel master alloy, aluminum-molybdenum 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 type smokeless covering agent, the amount o...

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Abstract

The invention discloses a heat-resistant aluminum alloy containing Mo-Be and a preparation method of the heat-resistant aluminum alloy containing Mo-Be and belongs to the field of metal material engineering. The heat-resistant aluminum alloy containing Mo-Be is prepared from, by mass percent, 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 Be, 0.3%-0.4% of Mo, 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 preparation method includes the steps that firstly, an aluminum and chromium intermediate alloy is molten, after other intermediate alloys and aluminum are added, a covering agent is added, slag is pushed aside after heat preservation, an aluminum refining agent is added, and slag is separated after heat heat preservation; secondly, casting is performed; and thirdly, cast blanks are subjected to solid solution and aging treatment. According to the alloy, due to multi-element alloying, the component range of the alloy is adjusted, high-temperature strength and high-temperature lasting performance of the alloy are remarkably improved after heat treatment, and the highest transient tensile strength reaches 260 MPa-270 MPa at 250 DEG C. Tensile strength ranges from 233 Mpa to 238 Mpa after heating is performed at 200 DEG C for 200 h, and tensile strength ranges from 187 Mpa to 195 Mpa after heating is performed at 250 DEG C for 200 h.

Description

technical field [0001] The invention belongs to the field of metal material engineering, in particular to a heat-resistant aluminum alloy containing Mo-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 casting ...

Claims

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Application Information

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