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6082G aluminum alloy plate for rail transit and machining technology thereof

An aluminum alloy sheet and rail transit technology, applied in the field of aluminum alloy processing and manufacturing, can solve the problems of low cross-welding tensile properties and inability to meet the cross-welding tensile requirements of the car body, etc., so as to suppress grain growth and improve post-welding performance effect

Inactive Publication Date: 2019-01-29
TIANJIN ZHONGWANG ALUMINUM IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of this, in order to solve the problem that the existing 6082 aluminum alloy cannot meet the cross-welding tensile requirements of the car body, and the cross-welding tensile performance is often low, the present invention provides a 6082G aluminum alloy plate for rail transit and its processing technology

Method used

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  • 6082G aluminum alloy plate for rail transit and machining technology thereof
  • 6082G aluminum alloy plate for rail transit and machining technology thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A kind of processing technology of 6082G aluminum alloy sheet material for rail transit, comprises the following steps:

[0026] A. According to the predetermined weight percentage, put the ingredients of the above-mentioned 6082G aluminum alloy plates into the melting furnace for refining, online degassing, and online filtering, and then cast the molten aluminum into aluminum alloy ingots;

[0027] B. Cut off the head and tail of the aluminum alloy ingot after melting and casting, and then use a milling machine to mill out the condensed shell layer on the surface of the aluminum alloy ingot;

[0028] C. Place the milled aluminum alloy ingot in a heating furnace for homogenization heat treatment. The process of homogenization heat treatment is: the aluminum alloy ingot is heated to 540 ° C, kept for 8 hours, then cooled to 500 ° C, kept for 2 hours, and rolled out of the furnace. Made into coils, the rolled coils are cut into plates by cross-shear equipment, and the thi...

Embodiment 2

[0033] A kind of processing technology of 6082G aluminum alloy sheet material for rail transit, comprises the following steps:

[0034] A. According to the predetermined weight percentage, put the ingredients of the above-mentioned 6082G aluminum alloy plates into the melting furnace for refining, online degassing, and online filtering, and then cast the molten aluminum into aluminum alloy ingots;

[0035] B. Cut off the head and tail of the aluminum alloy ingot after melting and casting, and then use a milling machine to mill out the condensed shell layer on the surface of the aluminum alloy ingot;

[0036] C. Place the milled aluminum alloy ingot in a heating furnace for homogenization heat treatment. The process of homogenization heat treatment is: the aluminum alloy ingot is heated to 560 ° C, kept for 8 hours, then cooled to 500 ° C, kept for 2 hours, and rolled out of the furnace It is made into a coil, and the rolled coil is cut into a plate by a cross-shear device, and...

Embodiment 3

[0041] A kind of processing technology of 6082G aluminum alloy sheet material for rail transit, comprises the following steps:

[0042] A. According to the predetermined weight percentage, put the ingredients of the above-mentioned 6082G aluminum alloy plates into the melting furnace for refining, online degassing, and online filtering, and then cast the molten aluminum into aluminum alloy ingots;

[0043] B. Cut off the head and tail of the aluminum alloy ingot after melting and casting, and then use a milling machine to mill out the condensed shell layer on the surface of the aluminum alloy ingot;

[0044] C. Place the milled aluminum alloy ingot in a heating furnace for homogenization heat treatment. The process of homogenization heat treatment is: the aluminum alloy ingot is heated to 540 ° C, kept for 8 hours, then cooled to 500 ° C, kept for 2 hours, and rolled out of the furnace. Made into plates, the thickness of which is 18mm;

[0045] D. Place the sheared plate in a...

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Abstract

The invention belongs to the technical field of aluminum alloy machining and manufacturing, and relates to a 6082G aluminum alloy plate for rail transit and a machining technology thereof. The 6082G aluminum alloy plate is prepared from the following elemental components in percentage by weight: 0.9-1.2% of Si, 0.20-0.40% of Fe, less than or equal to 0.1% of Cu, 0.6-0.9% of Mn, 0.9-1.1% of Mg, 0.15-0.25% of Cr, less than or equal to 0.1% of Zn, 0.01-0.03% of Ti, less than or equal to 0.03% of single impurity, less than or equal to 0.10% of total impurity and the balance of Al. The machining technology includes the steps of batching, smelting casting, sawing and surface milling, homogenization heat treatment, hot rolling, shearing, solid solution treatment, stretching, aging, sawing and packaging. By strictly controlling the content of Fe, Mn, Cr in the machining process, the effect of inhibiting grain growth after welding is achieved through homogenization and solid solution treatment,a 6082G alloy with qualified cross-welding tensile properties for the rail transit is obtained, the mechanical properties of cross-welding tensioning of a vehicle body are improved, and the 6082G aluminum alloy plate can be widely applied to rail transit structural members.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloy processing and manufacturing, and relates to a 6082G aluminum alloy plate for rail transit and a processing technology thereof. Background technique [0002] 6082 aluminum alloy is an Al-Mg-Si alloy, which belongs to the heat-treatable aluminum alloy with medium strength and is widely used in the field of rail transit because of its good formability and machinability. One of the components used. In the field of rail transit, the processing method often used is welding processing, especially for car body parts, cross welding is an extremely important welding processing method. Ordinary 6082 cannot meet the requirements of cross-welding tension, and the cross-welding tensile performance is often low. If the customer uses cross-welded plates with low tensile properties to make the car body, it will cause the train to end its service period prematurely, and even cause the risk of major traffi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/02C22C1/03C22F1/05
CPCC22C1/026C22C1/03C22C21/02C22F1/002C22F1/05
Inventor 刘俊涛赵俊才宋扬蔡鹏程崔学团郭富安马青梅
Owner TIANJIN ZHONGWANG ALUMINUM IND CO LTD
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