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A kind of high and low temperature resistant aluminum alloy for gear box of EMU and preparation method thereof

A technology of high and low temperature resistance, aluminum alloy, applied in the field of aluminum alloy, can solve the problems of poor strength, poor high and low temperature resistance, etc., to improve the flexural resistance and strength, improve the high and low temperature performance, and improve the stability of the microstructure. Effect

Active Publication Date: 2019-01-01
LAIAN KELAIXING IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are problems such as poor high and low temperature resistance and poor strength in my country's EMU gearboxes.

Method used

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  • A kind of high and low temperature resistant aluminum alloy for gear box of EMU and preparation method thereof
  • A kind of high and low temperature resistant aluminum alloy for gear box of EMU and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0021] A high and low temperature resistant aluminum alloy for the gear box of an EMU, the composition of the aluminum alloy includes the following components by weight percentage: Mg: 0.6%, Cu: 1.1%, Zn: 0.08%, Si: 7.2%, B: 0.07 %, Ti: 0.25%, Ni: 0.01%, Nd: 0.08%, Mn: 0.2%, Pt: 0.03%, Cd: 0.005%, Sn: 0.018%, Cr: 0.01%, Ge: 0.024%, Nb: 0.035 %, Mo: 0.062%, Hf: 0.048%, the single content of other impurity elements ≤0.05%, the total content of other impurity elements ≤0.15%, and the balance is Al.

[0022] The preparation method of the high and low temperature resistant aluminum alloy for the motor train gear box proposed by the present invention, the specific steps are as follows:

[0023] S1. Melting: Preheat the melting furnace for 25 minutes, put pure Al into the furnace, heat to 735°C, keep the temperature for 30 minutes after the pure Al is melted, then add other raw materials in order of melting point from low to high, and stir After it is completely melted, lower the te...

Embodiment 2

[0028] A high and low temperature resistant aluminum alloy for the gearbox of an EMU, the composition of the aluminum alloy includes the following components by weight percentage: Mg: 0.75%, Cu: 0.96%, Zn: 0.14%, Si: 6.72%, B: 0.096 %, Ti: 0.225%, Ni: 0.02%, Nd: 0.064%, Mn: 0.37%, Pt: 0.025%, Cd: 0.008%, Sn: 0.015%, Cr: 0.022%, Ge: 0.021%, Nb: 0.042 %, Mo: 0.051%, Hf: 0.052%, the single content of other impurity elements ≤0.05%, the total content of other impurity elements ≤0.15%, and the balance is Al.

[0029] The preparation method of the high and low temperature resistant aluminum alloy for the motor train gear box proposed by the present invention, the specific steps are as follows:

[0030] S1. Melting: Preheat the melting furnace for 28 minutes, put pure Al into the furnace, heat to 730°C, keep the temperature for 38 minutes after the pure Al is melted, and then add other raw materials in order of melting point from low to high, in the stirring state After it is comple...

Embodiment 3

[0038] A high and low temperature resistant aluminum alloy for the gearbox of an EMU, the composition of the aluminum alloy includes the following components by weight percentage: Mg: 0.9%, Cu: 0.86%, Zn: 0.2%, Si: 6.4%, B: 0.13 %, Ti: 0.16%, Ni: 0.04%, Nd: 0.056%, Mn: 0.58%, Pt: 0.018%, Cd: 0.011%, Sn: 0.011%, Cr: 0.025%, Ge: 0.016%, Nb: 0.054 %, Mo: 0.042%, Hf: 0.066%, the individual content of other impurity elements is ≤0.05%, the total content of other impurity elements is ≤0.15%, and the balance is Al.

[0039] The preparation method of the high and low temperature resistant aluminum alloy for the motor train gear box proposed by the present invention, the specific steps are as follows:

[0040] S1. Melting: preheat the melting furnace for 27 minutes, put pure Al into the furnace, heat to 720°C, keep the temperature for 35 minutes after the pure Al is melted, and then add other raw materials in order of melting point from low to high, in the stirring state After it is c...

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Abstract

The invention discloses a high- and low-temperature-resistant aluminum alloy for a gear box of a motor train unit and a preparation method therefor. The aluminum alloy comprises the following components in percentages by weight: Mg, Cu, Zn, Si, B, Ti, Ni, Nd, Mn, Pt, Cd, Sn, Cr, Ge, Nb, Mo, Hf, and the balance of Al, wherein the single content of other impurity elements is less than or equal to 0.05% and the total content of the other impurity elements is less than or equal to 0.15%. According to the alloy disclosed by the invention, the alloy components are reasonable, the process is optimized, and the obtained aluminum alloy has the advantages of being light in weight, high in strength, corrosion-resistant, high- and low-temperature-resistant, is unlikely to crack and the like, and can satisfy the performance requirements of the gear box of the motor train unit.

Description

technical field [0001] The invention relates to the technical field of aluminum alloys, in particular to a high and low temperature resistant aluminum alloy used for a gearbox of an EMU and a preparation method thereof. Background technique [0002] Aluminum alloy is the most widely used non-ferrous metal structural material in the industry. Since aluminum alloy has high strength and good processing and forming performance, in order to greatly reduce the weight of the component and improve the stability of the structure, it can be Choose to use aluminum alloy material instead of steel material. At present, aluminum alloy has been widely used in aviation, aerospace, automobile, machinery manufacturing, shipbuilding and chemical industry. With the rapid development of industrial economy, the demand for aluminum alloys is increasing, and the research on aluminum alloys is also in-depth. At present, there are problems such as poor high and low temperature resistance and poor s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/02C22C1/02C22C1/06C22F1/043
CPCC22C1/026C22C1/06C22C21/02C22F1/043
Inventor 黄俊辉高小平姚海粟赵志铎倪付峰乔丽管学来邹军周永清
Owner LAIAN KELAIXING IND CO LTD
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