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Near-eutectic type high-strength heat-resistant Al-Ce-series aluminum alloy and preparation method

An aluminum alloy, near-eutectic technology, applied in the field of alloys, can solve the problems of low room temperature and high temperature strength, high cost, expensive raw material Sc element, etc., and achieve the effects of good fluidity, good casting performance and abundant reserves

Active Publication Date: 2019-10-25
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The room temperature tensile strength of the patented aluminum alloy is only 165MPa, and the tensile strength at 300°C does not exceed 100MPa. The room temperature and high temperature strength is low, and the raw material Sc is expensive and the cost is high.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031]This embodiment provides a near-eutectic high-strength and heat-resistant Al-Ce aluminum alloy. The aluminum alloy is composed of the following elements in weight percentage: Ce is 8.00%, Fe is 2.50%, Mg is 0.50%, and Si is 0.30% %, Cu is 0.80%, Co is 0.30%, B is 0.001%, Ti is 0.001%, V is 0.001%, Cr is 0.001%, Mn is 0.001%, Ni is 0.10%, other impurity element content is ≤0.10%, The rest is aluminum.

[0032] In the above-mentioned aluminum alloy in this embodiment, cerium is the main strengthening element, and cerium element and aluminum element undergo eutectic reaction to form Al 11 Ce 3 The intermetallic compound has good thermal stability and effectively enhances the strength and heat resistance of the aluminum alloy. Iron is a characteristic alloying element, and forms dispersed Al with aluminum in the alloy 3 Fe particles inhibit the creep deformation of the alloy and form AlFeRE compounds with cerium to refine the reinforcing phase of intermetallic compounds. ...

Embodiment 2

[0041] This embodiment provides a near-eutectic high-strength and heat-resistant Al-Ce aluminum alloy. The aluminum alloy is composed of the following elements in weight percentage: Ce is 9.00%, Fe is 1.00%, Mg is 0.50%, and Si is 0.20%. %, Cu is 1.00%, Co is 0.10%, B is 0.30%, Ti is 0.05%, V is 0.05%, Cr is 0.06%, Mn is 0.06%, Ni is 0.07%, and the content of other impurity elements is ≤0.10%. The rest is aluminum.

[0042] The above-mentioned near-eutectic high-strength heat-resistant Al-Ce aluminum alloy in this embodiment can be prepared by the following method, and the specific steps are as follows:

[0043] Step 1: Select an aluminum ingot with a purity of 99.8%, place the aluminum ingot in a furnace and melt it into molten aluminum, and the temperature of the molten aluminum is 740°C.

[0044] Step 2: Add the raw materials of the alloy components required for preparing the aluminum alloy into the molten aluminum, and adjust the addition amount of each alloy in the raw m...

Embodiment 3

[0049] This embodiment provides a near-eutectic high-strength and heat-resistant Al-Ce aluminum alloy: the aluminum alloy is composed of the following elements in weight percentage: Ce is 11.00%, Fe is 3.00%, Mg is 0.80%, and Si is 0.80% %, Cu is 1.20%, Co is 0.20%, B is 0.60%, Ti is 0.1%, V is 0.10%, Cr is 0.09%, Mn is 0.09%, Ni is 0.12%, and the content of other impurity elements is ≤0.10%. The rest is aluminum.

[0050] The above-mentioned near-eutectic high-strength heat-resistant Al-Ce aluminum alloy in this embodiment can be prepared by the following method, and the specific steps are as follows:

[0051] Step 1: Put aluminum ingots with a purity of 99.7% in a melting furnace to melt into molten aluminum, and the temperature of the molten aluminum is 730°C.

[0052] Step 2: Add the raw materials of the alloy components required for preparing the aluminum alloy into the molten aluminum, and adjust the addition amount of each alloy in the raw materials so that the alloy c...

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Abstract

The invention provides a near-eutectic type high-strength heat-resistant Al-Ce-series aluminum alloy and a preparation method. The near-eutectic type high-strength heat-resistant Al-Ce-series aluminumalloy is prepared from the following elements in percentage by weight: 5.00 percent to 15.00 percent of Ce, 0.01 percent to 5.00 percent of Fe, 0.10 percent to 1.20 percent of Mg, 0.05 percent to 1.00 percent of Si, 0.001 percent to 5.00 percent of Cu, 0.001 percent to 0.40 percent of Co, 0.001 percent to 0.85 percent of B, 0.001 percent to 0.20 percent of Ti, 0.001 percent to 0.15 percent of V,0.001 percent to 0.12 percent of Cr, 0.001 percent to 0.12 percent of Mn, 0.001 percent to 0.15 percent of Ni, and the balance aluminum. The near-eutectic type high-strength heat-resistant Al-Ce-series aluminum alloy provided by the invention has high strength and high heat resistance, the tensile strength at the room temperature reaches to more than 440MPa, and the tensile strength at 300 DEG C reaches to more than 250MPa; and the cost of raw materials for preparing the aluminum alloy is low, and a preparation process is simple.

Description

technical field [0001] The invention belongs to the technical field of alloys, and in particular relates to a near-eutectic high-strength and heat-resistant Al-Ce aluminum alloy and a preparation method thereof. Background technique [0002] Heat-resistant aluminum alloy has sufficient oxidation resistance at high temperatures, and has the ability to resist plastic deformation and damage under the long-term action of temperature and load. It also has the advantages of good thermal conductivity and light specific gravity. It is used in weapons, ships, and aviation. , aerospace, automotive and other industries are widely used, such as pistons, cylinder liners, connecting rods, boxes, cylinder heads, missile shells, empennages, aeroengine cylinders, blades, aircraft skins, etc. of vehicle engines. With the rapid development of aviation, aerospace and automobile industries, higher requirements are placed on the performance of heat-resistant aluminum alloys. [0003] During the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/00C22C1/02C22F1/04
CPCC22C1/026C22C21/00C22F1/04
Inventor 高海燕张驰王朦朦李敏王宇飞王俊孙宝德
Owner SHANGHAI JIAO TONG UNIV
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