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A special heat-resistant aluminum alloy for the gearbox case of high-speed EMU and its preparation method

A technology for high-speed EMUs and gearboxes, which is applied in the field of aluminum alloy materials, can solve the problems of easy cracking, poor strength and poor heat resistance of the box body, so as to increase the resistance to intergranular corrosion and improve high temperature creep. performance, excellent corrosion resistance and high temperature creep resistance

Active Publication Date: 2019-05-07
LAIAN KELAIXING IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing EMU gear boxes are mostly made of aluminum alloy materials. Due to the defects of poor strength and poor heat resistance of existing aluminum alloys, there is a risk of cracks in the gear box when applied to the gear box.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The present invention proposes a special heat-resistant aluminum alloy for the gear box of a high-speed EMU, and its composition includes: Zn: 5%, Mg: 1.5%, Mn: 0.8%, Zr: 1.5%, W: 0.5%. , V: 0.2%, Be: 0.01%, Ti: 0.5%, Si: 0.02%, Ni: 0.2%, Ga: 0.05%, Fe: 0.3%, Cu: 0.2%, Cr: 0.15%, Sc: 0.1% , Ag: 1.2%, Pr: 0.1%, Y: 0.5%, In: 0.1%, B: 0.3%, Li: 0.5%, and the balance is Al.

[0026] The present invention also proposes a method for preparing the special heat-resistant aluminum alloy for the gearbox case of the high-speed EMU, comprising the following steps:

[0027] S1. Combine zinc powder, magnesium powder, silicon powder, titanium ingot, iron powder, boron powder, copper block, indium ingot, chromium powder, manganese powder, zirconium powder, tungsten powder, vanadium iron, beryllium powder, nickel powder, gallium powder , scandium ingot, silver powder, praseodymium powder, yttrium ingot, and lithium powder are smelted to obtain material A;

[0028] S2. Refining and deo...

Embodiment 2

[0032] The present invention proposes a special heat-resistant aluminum alloy for the gear box of high-speed EMUs, and its composition includes: Zn: 2%, Mg: 2.8%, Mn: 0.1%, Zr: 0.5%, W: 1.5%. , V: 0.1%, Be: 0.08%, Ti: 0.2%, Si: 0.1%, Ni: 0.05%, Ga: 0.15%, Fe: 0.1%, Cu: 0.5%, Cr: 0.05%, Sc: 0.5% , Ag: 0.3%, Pr: 0.5%, Y: 0.2%, In: 0.5%, B: 0.1%, Li: 1.2%, and the balance is Al.

[0033] The present invention also proposes a method for preparing the special heat-resistant aluminum alloy for the gearbox case of the high-speed EMU, comprising the following steps:

[0034] S1. Combine zinc powder, magnesium powder, silicon powder, titanium ingot, iron powder, boron powder, copper block, indium ingot, chromium powder, manganese powder, zirconium powder, tungsten powder, vanadium iron, beryllium powder, nickel powder, gallium powder , scandium ingot, silver powder, praseodymium powder, yttrium ingot, and lithium powder are smelted to obtain material A;

[0035] S2. Refining and deox...

Embodiment 3

[0039] The present invention proposes a special heat-resistant aluminum alloy for gearboxes of high-speed EMUs, the components of which include Zn: 4.3%, Mg: 2.45%, Mn: 0.2%, Zr: 1.5%, and W: 0.9%. , V: 0.17%, Be: 0.03%, Ti: 0.37%, Si: 0.07%, Ni: 0.16%, Ga: 0.07%, Fe: 0.26%, Cu: 0.27%, Cr: 0.13%, Sc: 0.15% , Ag: 0.7%, Pr: 0.4%, Y: 0.26%, In: 0.17%, B: 0.22%, Li: 0.87%, and the balance is Al.

[0040] The present invention also proposes a method for preparing the special heat-resistant aluminum alloy for the gearbox case of the high-speed EMU, comprising the following steps:

[0041] S1. Combine zinc powder, magnesium powder, silicon powder, titanium ingot, iron powder, boron powder, copper block, indium ingot, chromium powder, manganese powder, zirconium powder, tungsten powder, vanadium iron, beryllium powder, nickel powder, gallium powder , scandium ingot, silver powder, praseodymium powder, yttrium ingot, and lithium powder are smelted to obtain material A;

[0042] S2. R...

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Abstract

The invention discloses a heat-resistant aluminum alloy special for a high-speed train gearbox body. The heat-resistant aluminum alloy is prepared from, by weight percent, 2%-5% of Zn, 1.5%-2.8% of Mg, 0.1%-0.8% of Mn, 0.5%-1.5% of Zr, 0.5%-1.5% of W, 0.1%-0.2% of V, 0.01%-0.08% of Be, 0.2%-0.5% of Ti, 0.02%-0.1% of Si, 0.05%-0.2% of Ni, 0.05%-0.15% of Ga, 0.1%-0.3% of Fe, 0.2%-0.5% of Cu, 0.05%-0.15% of Crr, 0.1%-0.5% of Sc, 0.3%-1.2% of Ag, 0.1%-0.5% of Pr, 0.2%-0.5% of Y, 0.1%-0.5% of In, 0.1%-0.3% of B, 0.5%-1.2% of Li and the balance Al.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy materials, in particular to a special heat-resistant aluminum alloy for a gearbox case of a high-speed train set and a preparation method thereof. Background technique [0002] The gearbox drive device of high-speed EMU is a key component to ensure the continuous and stable operation of high-speed trains, and it is a part of the train power bogie. One end of the gearbox is fixed on the frame, and the other end is installed on the axle, and is connected with the traction motor of the EMU through a coupling to realize power transmission. Existing EMU gearboxes are mostly made of aluminum alloys. Due to the defects of poor strength and poor heat resistance of existing aluminum alloys, there is a risk of cracks in the gearboxes when they are used in gearboxes. Contents of the invention [0003] Based on the technical problems existing in the background technology, the present invention propo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/10C22C1/06C22F1/053
CPCC22C1/06C22C21/10C22F1/002C22F1/053
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