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Li-Nb-RE high-strength heat-resistance aluminium alloy material and preparation method thereof

An aluminum alloy material and heat-resistant technology, which is applied in the field of aluminum alloy materials of micro-alloying elements and rare earth elements and its preparation, can solve problems such as low high-temperature strength, extensive melt treatment process, and lower alloy quasi-solid phase temperature range

Inactive Publication Date: 2011-06-22
GUIZHOU HUAKE ALUMINUM MATERIAL ENG TECH RES
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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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  • Li-Nb-RE high-strength heat-resistance aluminium alloy material and preparation method thereof
  • Li-Nb-RE high-strength heat-resistance aluminium alloy material and preparation method thereof
  • Li-Nb-RE high-strength heat-resistance aluminium alloy material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0106] Example 1: Cu-1.0%, characteristic microalloying elements-Li, Nb, basic microalloying rare earth elements-lanthanum La

[0107] (1) Weigh the various alloying elements required according to the ingredient calculation table, as follows.

[0108]

[0109] (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.

[0110] (3) Add Al-Mn, Al-Ti, Al-Li, Al-Nb, Al-Zr master alloys or mixed metal additives (including salt compounds) according to the formula ratio, and then add Cu pure metal and Al-Cd master alloy or mixed metal additives, then add B and rare earth element La, and stir evenly.

[0111] Mixed metal additives refer to cake-shaped or massive non-sintered powder metallurgy products for adding and adjusting alloy components, including manganese, copp...

Embodiment 2

[0117] Example 2: Cu-4.2%, characteristic microalloying elements-Li, Nb, basic microalloying rare earth elements La, Ce mixed rare earth

[0118] (1) Weigh the various alloying elements required according to the ingredient calculation table, as follows.

[0119]

[0120](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.

[0121] (3) Add Al-Mn, Al-Ti, Al-Li, Al-Nb, Al-Zr master alloys or mixed metal additives (including salt compounds) according to the formula ratio, and then add Cu pure metal and Al-Cd master alloy or mixed metal additives, then add B and rare earth elements La, Ce mixed rare earth, and stir evenly.

[0122] Mixed metal additives refer to cake-shaped or massive non-sintered powder metallurgy products for adding and adjusting alloy compo...

Embodiment 3

[0128] Example 3: Cu-5.1%, characteristic microalloying elements-Li, Nb, basic microalloying rare earth element Eu

[0129] (1) Weigh the various alloying elements required according to the following ingredient calculation table, as follows.

[0130]

[0131] (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.

[0132] (3) Add Al-Mn, Al-Ti, Al-Li, Al-Nb, Al-Zr master alloys or mixed metal additives (including salt compounds) according to the formula ratio, and then add Cu pure metal and Al-Cd master alloy or mixed metal additives, then add B and rare earth element Eu, and stir evenly.

[0133] Mixed metal additives refer to cake-shaped or massive non-sintered powder metallurgy products for adding and adjusting alloy components, including manganese, coppe...

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Abstract

The invention discloses a high-strength heat-resistance aluminum alloy material and a preparation method thereof. The material comprises the 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, 0.1-3.0% of Li, 0.01-1.0% of Nb, 0.05-5% of RE and the balance of Al. By adopting high-quality melt and solid solution and phase diagram principle as guide and preferably choosing alloy main elements Cu, Mn and RE formula, the invention reduces alloy standard solid phase temperature range and solves the problems of large hot crack tendency, low high-temperature strength of products and the like in casting; in addition, by preferably choosing low-cost multielement microalloying elemen formula, the invention creates material condition for culturing and grain refining of medium-high and strengthening phases of the solid solution so as to finally prepare the high-strength heat-resistance aluminum alloy material.

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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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/00C22C21/12C22C1/02C22C1/03C22C1/06C22F1/04C22F1/057
Inventor 张中可车云陈新孟门三泉李祥胥光酉
Owner GUIZHOU HUAKE ALUMINUM MATERIAL ENG TECH RES