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Machining method for 7-series aluminum alloy thick plates

A processing method and technology for aluminum alloy plates, applied in the processing of 7-series aluminum alloy thick plates, and the processing field of 7-series aluminum alloy thick plates, can solve problems such as sharp increase in production costs, achieve excellent strength and fracture toughness, and improve alloy strength , Improve the effect of thermoplasticity

Inactive Publication Date: 2019-03-12
TIANJIN ZHONGWANG ALUMINUM IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, in order to solve the problem in the prior art that reducing coarse compounds in 7-series aluminum alloy thick plates by controlling the content of impurity elements will lead to a sharp increase in production costs, the present invention provides a 7-series aluminum alloy thick plate processing methods

Method used

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  • Machining method for 7-series aluminum alloy thick plates
  • Machining method for 7-series aluminum alloy thick plates
  • Machining method for 7-series aluminum alloy thick plates

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A processing method for a 7-series aluminum alloy thick plate, comprising the steps of:

[0034] A. Ingredients: aluminum alloy ingots are made according to the following mass percentages:

[0035] element

Si

Fe

Cu

Mg

Zn

Ti

Zr

Al

content

0.2

0.25

1.2

1.2

5.5

0.02

0.13

margin

[0036] Single impurity ≤ 0.05%, total impurity ≤ 0.15%;

[0037] B. Melting: Put the prepared aluminum alloy raw materials in a melting furnace to melt into liquid aluminum alloy, and melt and cast the liquid aluminum alloy into aluminum alloy ingot. The melting temperature of the liquid aluminum alloy is 700°C. When the aluminum alloy raw material is 30% melted into molten aluminum, the electromagnetic stirring is turned on. Composition, converter to holding furnace for in-furnace refining. After the composition is qualified, the melt is left to stand for 30 minutes, and then the gas and slag in the melt are removed at ...

Embodiment 2

[0045] A processing method for a 7-series aluminum alloy thick plate, comprising the steps of:

[0046] A. Ingredients: aluminum alloy ingots are made according to the following mass percentages:

[0047] element

Si

Fe

Cu

Mg

Zn

Ti

Zr

Al

content

0.12

0.20

2.0

1.7

6.2

0.08

0.07

margin

[0048] Single impurity ≤ 0.05%, total impurity ≤ 0.15%;

[0049] B. Melting: Put the prepared aluminum alloy raw materials in a melting furnace to melt into liquid aluminum alloy, and melt and cast the liquid aluminum alloy into aluminum alloy ingot. The melting temperature of the liquid aluminum alloy is 760°C. When the aluminum alloy raw material is 30% melted into molten aluminum, the electromagnetic stirring is turned on. Composition, converter to holding furnace for in-furnace refining. After the composition is qualified, the melt is left to stand for 30 minutes, and then the gas and slag in the melt are removed at...

Embodiment 3

[0057] A processing method for a 7-series aluminum alloy thick plate, comprising the steps of:

[0058] A. Ingredients: aluminum alloy ingots are made according to the following mass percentages:

[0059] element

Si

Fe

Cu

Mg

Zn

Ti

Zr

Al

content

0.2

0.25

1.7

1.5

6.0

0.12

0.03

margin

[0060] Single impurity ≤ 0.05%, total impurity ≤ 0.15%;

[0061] B. Melting: Put the prepared aluminum alloy raw materials in a melting furnace to melt into liquid aluminum alloy, and melt and cast the liquid aluminum alloy into aluminum alloy ingot. The smelting temperature of the liquid aluminum alloy is 760°C. When 40% of the aluminum alloy raw material is melted into molten aluminum, the electromagnetic stirring is turned on. Composition, converter to holding furnace for in-furnace refining. After the composition is qualified, the melt is left to stand for 80 minutes, and then the gas and slag in the melt are removed...

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Abstract

The invention belongs to the technical field of aluminum alloy production, and relates to a machining method for 7-series aluminum alloy thick plates. Aluminum alloy ingots comprise the following components in percentage by mass: Si not more than 0.20%, Fe not more than 0.25%, 1.2-2.1% of Cu, 1.2-2.2% of Mg, 5.0-7.0% of Zn, 0.02-0.15% of Ti, 0.02-0.15% of Zr, Ti+Zr not more than 0.15%, single impurity not more than 0.05%, total impurity not more than 0.15%, and the balance of Al. The machining method for the aluminum alloy thick plates adopts a mode of multi-pass hot rolling, and adopts double-stage solid solution and double-stage aging to enable the finally prepared 7-series aluminum alloy thick plates to achieve excellent strength and rupture toughness.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloy production and manufacture, and relates to a processing method for a 7-series aluminum alloy thick plate, in particular to a processing method for a 7-series aluminum alloy thick plate with a thickness greater than 12 mm. Background technique [0002] With the widespread adoption of dual-aisle aircraft, the requirements for the overall processing performance of the aircraft are getting higher and higher, and aeronautical structural parts are gradually developing in the direction of thick plates or even ultra-thick plates. 7xxx series (Al-Zn-Mg-Cu series) aluminum alloys are widely used in aerospace structural parts due to their high strength, and their thick plate products have good properties such as fracture toughness, fatigue performance, and corrosion resistance, especially in the thickness direction of the plate. Sexuality puts forward higher demands. [0003] The microstructure of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/10C22F1/053C22C1/03C22C1/06
CPCC22C1/026C22C1/03C22C1/06C22C21/10C22F1/053
Inventor 刘俊涛宋扬赵俊才蔡鹏程崔学团郭富安马青梅
Owner TIANJIN ZHONGWANG ALUMINUM IND CO LTD
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