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High-strength aluminum alloy for motor train unit gearbox and preparation method of high-strength aluminum alloy

A technology of aluminum alloy and gear box, applied in the field of aluminum alloy, can solve the problems of easy cracking and poor strength of the box body, and achieve the effect of increasing corrosion resistance, high strength and improving strength.

Active Publication Date: 2017-02-01
LAIAN KELAIXING IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

my country's EMU gearboxes have poor strength, and the box is prone to cracks and other risks

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A high-strength aluminum alloy for the gearbox of an EMU, the composition of the aluminum alloy includes the following components by weight percentage: 1.6% magnesium, 1.6% copper, 4.5% zinc, 0.6% iron, 0.15% silicon, 0.32% titanium, Chromium 0.1%, tellurium 0.03%, germanium 0.05%, niobium 0.12%, erbium 0.02%, molybdenum 0.2%, cerium 0.015%, scandium 0.07%, zirconium 0.06%, strontium 0.12%, the individual content of other impurity elements ≤0.05%, other The total content of impurity elements is ≤0.2%, and the balance is aluminum.

[0021] The preparation method of the high-strength aluminum alloy for the motor train gear box that the present invention proposes, concrete steps are as follows:

[0022] S1. Melting: Preheat the melting furnace for 15 minutes, put pure aluminum into the furnace, heat to 730°C, keep the temperature for 20 minutes after the pure aluminum is melted, and then add other raw materials in order of melting point from low to high, in the stirring st...

Embodiment 2

[0027] A high-strength aluminum alloy for the gearbox of an EMU, the composition of the aluminum alloy includes the following components by weight percentage: 2.2% magnesium, 0.9% copper, 5.3% zinc, 0.2% iron, 0.45% silicon, 0.15% titanium, Chromium 0.24%, tellurium 0.005%, germanium 0.12%, niobium 0.05%, erbium 0.08%, molybdenum 0.06%, cerium 0.054%, scandium 0.02%, zirconium 0.18%, strontium 0.04%, the individual content of other impurity elements ≤0.05%, other The total content of impurity elements is ≤0.2%, and the balance is aluminum.

[0028] The preparation method of the high-strength aluminum alloy for the motor train gear box that the present invention proposes, concrete steps are as follows:

[0029] S1. Melting: Preheat the melting furnace for 20 minutes, put pure aluminum into the furnace, heat to 710°C, keep the temperature for 25 minutes after the pure aluminum is melted, and then add other raw materials in order of melting point from low to high, in the stirring...

Embodiment 3

[0034] A high-strength aluminum alloy for the gearbox of an EMU, the composition of the aluminum alloy includes the following components by weight percentage: 1.95% magnesium, 1.3% copper, 4.98% zinc, 0.42% iron, 0.29% silicon, 0.22% titanium, Chromium 0.18%, tellurium 0.018%, germanium 0.09%, niobium 0.08%, erbium 0.045%, molybdenum 0.14%, cerium 0.032%, scandium 0.04%, zirconium 0.11%, strontium 0.09%, the single content of other impurity elements ≤0.04%, other The total content of impurity elements is ≤0.15%, and the balance is aluminum.

[0035] The preparation method of the high-strength aluminum alloy for the motor train gear box that the present invention proposes, concrete steps are as follows:

[0036]S1. Melting: Preheat the melting furnace for 17 minutes, put pure aluminum into the furnace, heat to 720°C, keep the temperature for 23 minutes after the pure aluminum is melted, and then add other raw materials in order of melting point from low to high, in the stirring...

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PUM

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Abstract

The invention discloses high-strength aluminum alloy for a motor train unit gearbox and a preparation method of the high-strength aluminum alloy. The high-strength aluminum alloy comprises the following components in percentage by weight: Mg, Cu, Zn, Fe, Si, Ti, Cr, Te, Ge, Nb, Er, Mo, Ce, Sc, Zr, Sr and the balance of Al, wherein content of each of other impurity elements is equal to or less than 0.05%, and total content of other impurity elements is equal to or less than 0.2%. According to the invention, the alloy components are reasonable, the technology is optimized, and the obtained high-strength aluminum alloy has the advantages of light weight, high strength, corrosion resistance, low possibility of cracking and the like and can meet the performance requirements of the motor train unit gearbox.

Description

technical field [0001] The invention relates to the technical field of aluminum alloys, in particular to a high-strength aluminum alloy used for a gear box 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. my country's EMU gearboxes have poor strength, and the box is prone to cracks and other risks. Contents of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/10C22C1/02C22C1/06C22F1/053
CPCC22C1/026C22C1/06C22C21/10C22F1/053
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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