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Sc-RE aluminium alloy material with high strength and heat resistance and preparation method thereof

An aluminum alloy material and heat-resistant technology, which is applied in the field of aluminum alloy materials with microalloying elements and rare earth elements and their preparation, can solve the problems of low high temperature strength of products, poor casting performance, and reduction of alloy quasi-solid temperature range, etc. To achieve reasonable precipitation and distribution, maintain the effect of purity

Active Publication Date: 2011-04-20
GUIZHOU HUAKE ALUMINUM MATERIAL ENG TECH RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] 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 formula of multi-element microalloying elements to create material basic conditions for the cultivation and refinement of the strengthening phase in solid solution; and optimize smelting and heat treatment technology , to achieve sufficient cultivation of the strengthening phase in the solid solution and the full play of the fine-grain effect

Method used

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  • Sc-RE aluminium alloy material with high strength and heat resistance and preparation method thereof
  • Sc-RE aluminium alloy material with high strength and heat resistance and preparation method thereof
  • Sc-RE aluminium alloy material with high strength and heat resistance and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0086] Example 1: Cu-1.0%, characteristic microalloying element-Sc, basic microalloying rare earth element-La

[0087] (1) Weigh the various alloying elements required according to the ingredient calculation table, as follows.

[0088]

[0089] (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.

[0090] (3) Then add Al-Mn, Al-Ti, Al-Sc, 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-La master alloys, and stir evenly.

[0091] Mixed metal additives refer to cake-shaped or massive non-sintered powder metallurgy products for adding and adjusting alloy components, including manganese, copper, zi...

Embodiment 2

[0097] Example 2: Cu-4.2%, characteristic microalloying element-Sc, basic microalloying rare earth element-La, Ce mixed rare earth

[0098] (1) Weigh the various alloying elements required according to the ingredient calculation table, as follows.

[0099]

[0100] (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.

[0101] (3) Then add Al-Mn, Al-Ti, Al-Sc, 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 rare earth elements La, Ce mixed rare earth, and stir evenly.

[0102] Mixed metal additives refer to cake-shaped or massive non-sintered powder metallurgy products for adding and adjusting allo...

Embodiment 3

[0108] Example 3: Cu-6.01%, characteristic microalloying element-Sc, basic microalloying rare earth element-La, Ce, Pr mixed rare earth

[0109] (1) Weigh the various alloying elements required according to the ingredient calculation table, as follows.

[0110]

[0111] (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.

[0112] (3) Then add Al-Mn, Al-Ti, Al-Sc, 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 master alloy and rare earth elements La, Ce, Pr mixed rare earth, and stir evenly.

[0113] Mixed metal additives refer to cake-shaped or massive non-sintered powder metallurgy products for add...

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Abstract

The invention discloses an aluminium alloy material with high strength and heat resistance and a preparation method thereof. The aluminium alloy material comprises the following ingredients 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 Sc, 0.05-5% of RE and the balance of A1. In the invention, superior melt, solid solution and phase diagram theories are adopted as guidance. A formula of alloy main elements Cu, Mn and RE is preferably selected to reduce the temperature range of alloy quasi solid phasesand solve the problems of large heat crack tendency during casting, low product high-temperature strength and the like; and a formula of multielement micro-alloying elements is preferably selected, basic material conditions are provided for the culture and grain refinement action of strengthening phases in the solid solution, and the aluminium alloy material with high strength and heat resistanceis finally developed.

Description

technical field [0001] The invention relates to an aluminum alloy material and a preparation method thereof, in particular to an aluminum alloy material containing microalloying elements and rare earth elements 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 ...

Claims

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Application Information

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IPC IPC(8): C22C21/00C22C21/12C22C1/02C22C1/03C22C1/06C22F1/04C22F1/057
Inventor 车云张中可门三泉陈新孟胥光酉李祥
Owner GUIZHOU HUAKE ALUMINUM MATERIAL ENG TECH RES
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