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Cr-Lu high-strength heat-resisting aluminum alloy material and preparation method thereof

An aluminum alloy material and heat-resistant technology, which is applied in the field of Cr-Lu high-strength heat-resistant aluminum alloy material and its preparation, can solve the problems of low high temperature strength, extensive melt treatment process, and reduction of alloy quasi-solid temperature range.

Inactive Publication Date: 2011-04-27
贵州铝厂有限责任公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0025] The technical problem to be solved by the present invention is to solve the existing problems in the field of high-strength aluminum alloys, such as extensive melt treatment process, poor quality, large thermal cracking tendency, poor casting performance, low product yield, low high-temperature strength, waste materials and slag recycling. For technical problems such as poor usability, under the guidance of high-quality melt, solid solution and phase diagram theory, by optimizing the formula of main alloy elements Cu, Mn and rare earth elements, the temperature range of the quasi-solid phase of the alloy is reduced, and the hot cracking tendency during casting and the high temperature of the product are solved. The general problem of low strength (including instantaneous strength and durable strength); optimize the low-cost multi-element microalloying element formula to create material basic conditions for the cultivation and fine-graining of high-temperature phases and strengthening phases in solid solutions; and optimize Melting and heat treatment technology to realize sufficient cultivation of high-temperature phase and strengthening phase in solid solution and full play of fine-graining effect

Method used

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  • Cr-Lu high-strength heat-resisting aluminum alloy material and preparation method thereof
  • Cr-Lu high-strength heat-resisting aluminum alloy material and preparation method thereof
  • Cr-Lu high-strength heat-resisting aluminum alloy material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0105] Example 1: Cu-1.0%, characteristic microalloying element-Cr, basic microalloying rare earth element-Lu

[0106] (1) Weigh the various alloying elements required according to the ingredient calculation table, as follows.

[0107]

[0108] (2) Add an appropriate amount of aluminum ingots to the melting furnace, heat it to melt it completely and keep it warm at 700-800°C; in order to prevent the melt from inhaling too much air, the melting process should be as short as possible in a closed environment Finish.

[0109] (3) Add Al-Mn, Al-Ti, Al-Cr, Al-Zr intermediate alloy or mixed metal additives (including salt compounds) according to the formula ratio, and then add Cu pure metal and Al-Cd intermediate Alloy or mixed metal additives, then add Al-B and Al-Lu master alloys, and stir evenly.

[0110] Mixed metal additives refer to cake-shaped or massive non-sintered powder metallurgy products for adding and adjusting alloy components, including manganese, copper, zirconi...

Embodiment 2

[0116] Example 2: Cu-4.2%, characteristic microalloying element-Cr, basic microalloying rare earth element-Lu

[0117] (1) Weigh the various alloying elements required according to the ingredient calculation table, as follows.

[0118]

[0119] (2) Add an appropriate amount of aluminum ingots to the melting furnace, heat it to melt it completely and keep it warm at 700-800°C; in order to prevent the melt from inhaling too much air, the melting process should be as short as possible in a closed environment Finish.

[0120] (3) Add Al-Mn, Al-Ti, Al-Cr, Al-Zr intermediate alloy or mixed metal additives (including salt compounds) according to the formula ratio, and then add Cu pure metal and Al-Cd intermediate Alloy or mixed metal additives, then add Al-B and Al-Lu master alloys, and stir evenly.

[0121] Mixed metal additives refer to cake-shaped or massive non-sintered powder metallurgy products for adding and adjusting alloy components, including manganese, copper, zirconi...

Embodiment 3

[0127] Example 3: Cu-6.01%, characteristic microalloying element-Cr, basic microalloying rare earth element-Lu

[0128] (1) Weigh the various alloying elements required according to the ingredient calculation table, as follows.

[0129]

[0130] (2) Add an appropriate amount of aluminum ingots to the melting furnace, heat it to melt it completely and keep it warm at 700-800°C; in order to prevent the melt from inhaling too much air, the melting process should be as short as possible in a closed environment Finish.

[0131] (3) Add Al-Mn, Al-Ti, Al-Cr, Al-Zr intermediate alloy or mixed metal additives (including salt compounds) according to the formula ratio, and then add Cu pure metal and Al-Cd intermediate Alloy or mixed metal additives, then add Al-B and Al-Lu master alloys, and stir evenly.

[0132] Mixed metal additives refer to cake-shaped or massive non-sintered powder metallurgy products for adding and adjusting alloy components, including manganese, copper, zircon...

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Abstract

The invention discloses a Cr-Lu high-strength heat-resisting aluminum alloy material and a preparation method thereof. The Cr-Lu high-strength heat-resisting aluminum alloy material comprises the following alloy components in percentage by weight: 1.0-10.0% of Cu, 0.05-1.5% of Mn, 0.01-0.5% of Cd, 0.01-0.5% of Ti, 0.01-0.2% of B, 0.01-1.0% of Zr, 0.01-1.0% of Cr, 0.05-5% of Lu and balance of Al. Based on high quality fusant and solid solution and the phase diagram theory, the invention optimizes the major alloying element formula (Cu, Mn and Lu) to reduce the quasi solid-phase temperature range of the alloy, thereby solving the problems of high thermal cracking possibility in the casing process, low high-temperature strength of the product and the like; the invention optimizes the low-cost composite microalloying element formula, thereby creating physical and basic conditions for the cultivation and grain refining effect of the high-temperature phase and the strengthening phase in the solid solution; and the invention optimizes smelting and heat treatment technologies to ultimately develop a novel aluminum alloy material.

Description

technical field [0001] The invention relates to an aluminum alloy material and a preparation method thereof, in particular to a Cr-Lu high-strength heat-resistant aluminum alloy material and a preparation method thereof. Background technique [0002] Aluminum alloy is a relatively young metal material, which only began to be used industrially in the early 20th century. During World War II, aluminum was mainly used in the manufacture of military aircraft. After the war, due to the sharp decrease in the demand for aluminum in the military industry, the aluminum industry began to develop civilian aluminum alloys, expanding its application scope from the aviation industry to the construction industry, container packaging industry, transportation industry, electric power and electronics industry, Various sectors of the national economy such as machinery manufacturing and petrochemicals are applied to people's daily lives. At present, aluminum is used in a large amount and in a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/00C22C21/12C22C1/02C22C1/03C22C1/06C22F1/04C22F1/057
Inventor 张中可车云周利洪曹跃清卢锦德胥光酉李祥
Owner 贵州铝厂有限责任公司
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