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High-strength and high-toughness aluminum alloy for rail transit and production process

A rail transit, high-strength and high-toughness technology, applied in the field of aluminum alloy materials, can solve problems such as dissatisfaction, and achieve the effects of reducing structural defects, reducing secondary crystal spacing, and improving quenching sensitivity

Inactive Publication Date: 2021-10-26
SHANDONG INNOVATION METAL TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the aluminum alloy materials used in rail transit need to have higher strength and higher toughness. The current aluminum alloy materials on the market do not meet the requirements of rail transit for high strength and high toughness aluminum alloys.

Method used

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  • High-strength and high-toughness aluminum alloy for rail transit and production process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A high-strength and high-toughness aluminum alloy for rail transit, according to the mass percentage, the element composition of the aluminum alloy product is: Si: 0.70%; Mg: 0.90%; Cu: 0.20%; Cr: 0.10%; Mn: 0.21%; Zr: 0.13%; Y: 0.04%; Ti: 0.04%; the balance is Al and unavoidable impurities.

[0034] In addition, the present invention also provides a production process of the above-mentioned high-strength and high-toughness aluminum alloy for rail transit, and the preparation process of the aluminum alloy includes the following steps:

[0035] (1) Calculate the quality of each raw material according to the element formula, add electrolytic aluminum liquid into the furnace, control the temperature of the aluminum liquid to 755-765 °C, and then add Si: 0.70%; Cu: 0.20%; Cr: 0.10%; Mn: 0.21%; Zr: 0.13%; Y: 0.04%; Ti: 0.04%, stirring and melting into aluminum alloy liquid;

[0036] (2) Stir the aluminum alloy liquid magnetically for 13 minutes, then let it stand for 8 minu...

Embodiment 2

[0053] A high-strength and high-toughness aluminum alloy for rail transit, according to the mass percentage, the element composition of the aluminum alloy product is: Si: 0.90%; Mg: 1.20%; Cu: 0.40%; Cr: 0.16%; Mn: 0.26%; Zr: 0.18%; Y: 0.08%; Ti: 0.07%; the balance is Al and unavoidable impurities.

[0054] In addition, the present invention also provides a production process of the above-mentioned high-strength and high-toughness aluminum alloy for rail transit, and the preparation process of the aluminum alloy includes the following steps:

[0055] (1) Calculate the mass of each raw material according to the element formula, add electrolytic aluminum liquid into the furnace, control the temperature of the aluminum liquid to 765°C, and then add Si: 0.90%; Cu: 0.40%; Cr: 0.16%; Mn: 0.26% ; Zr: 0.18%; Y: 0.08%; Ti: 0.07%, stirring and melting into aluminum alloy liquid;

[0056] (2) Stir the aluminum alloy liquid magnetically for 15 minutes, then let it stand for 10 minutes, t...

Embodiment 3

[0073] A high-strength and high-toughness aluminum alloy for rail transit, according to the mass percentage, the element composition of the aluminum alloy product is: Si: 0.80%; Mg: 0.10%; Cu: 0.30%; Cr: 0.13%; Mn: 0.23%; Zr: 0.15%; Y: 0.06%; Ti: 0.06%; the balance is Al and unavoidable impurities.

[0074] In addition, the present invention also provides a production process of the above-mentioned high-strength and high-toughness aluminum alloy for rail transit, and the preparation process of the aluminum alloy includes the following steps:

[0075] (1) Calculate the mass of each raw material according to the element formula, add electrolytic aluminum liquid into the furnace, control the temperature of the aluminum liquid to 765°C, and then add Si: 0.80%; Cu: 0.30%; Cr: 0.13%; Mn: 0.23% ; Zr: 0.15%; Y: 0.06%; Ti: 0.06%, stirring and melting into aluminum alloy liquid;

[0076] (2) Magnetically stir the aluminum alloy liquid for 14 minutes, then stir again after standing stil...

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Abstract

The invention relates to the field of aluminum alloy materials, in particular to a high-strength and high-toughness aluminum alloy for rail transit and a production process. The aluminum alloy product comprises the following elements in percentage by mass: 0.70-0.90% of Si, 0.90%-1.20% of Mg, 0.20%-0.40% of Cu, 0.10%-0.16% of Cr, 0.21%-0.26% of Mn, 0.13%-0.18% of Zr, 0.04%-0.08% of Y, 0.04%-0.07% of Ti and the balance of Al and inevitable impurities. The production process comprises the steps of smelting, refining, online refining, ultrasonic semi-continuous casting, casting blank homogenizing treatment, extrusion forming, heating aging treatment and the like. The aluminum alloy produced by the process has higher strength and toughness and high corrosion resistance, and can meet the requirements of the rail transit field on the high-strength and high-toughness aluminum alloy.

Description

technical field [0001] The invention relates to the field of aluminum alloy materials, in particular to a high-strength and high-toughness aluminum alloy for rail transit and a production process. Background technique [0002] Aluminum alloy is a lightweight material with excellent performance, and has broad application prospects in the field of rail transit. Aluminum alloy materials are attracting more and more attention due to their low density, high strength, good corrosion resistance, and easy surface processing and coating. [0003] Use large thin-walled, hollow extruded profiles, aluminum alloy plates to process and manufacture aluminum alloy car body structural parts for rail transit vehicles such as high-speed trains, subways, and light rails, as well as side walls, inner and outer end walls, and doors made of aluminum alloy. Column covers, seats, water tanks and other train equipment and other structural parts have excellent performances such as light weight, corro...

Claims

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Application Information

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IPC IPC(8): C22C21/08C22C1/03C22C1/06C22F1/047
CPCC22C21/08C22C1/026C22C1/03C22C1/06C22F1/047C22F1/002
Inventor 崔立新赵晓光高尚辉吴胜利
Owner SHANDONG INNOVATION METAL TECH
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