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Ultra-thick high-strength aluminum alloy plate and preparation method thereof

An aluminum alloy plate and aluminum alloy plate technology, which is applied in the field of aluminum alloy profile production, can solve the problem that the mechanical strength of ultra-thick aluminum alloy plate with quenching sensitivity is difficult to meet the standard, achieve fine and stable microstructure, reduce quenching sensitivity, and improve product quality. The effect of forming rate

Active Publication Date: 2018-12-18
YINGKOU ZHONGWANG ALUMINUM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of this, the present invention provides an ultra-thick high-strength aluminum alloy plate in order to solve the problem that the existing 7-series large-section ultra-thick aluminum alloy plate has a quenching sensitivity that makes the mechanical strength of the ultra-thick aluminum alloy plate difficult to meet the standard. and its preparation method

Method used

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  • Ultra-thick high-strength aluminum alloy plate and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A method for preparing an ultra-thick high-strength aluminum alloy plate, comprising the following steps:

[0026] A. Calculate the amount of each aluminum alloy raw material and prepare the aluminum alloy raw material according to the ratio. The ratio of the mass percentage of each element of the aluminum alloy plate raw material is as follows:

[0027] element

Zn

Mg

Cu

Si

Fe

Ti

Impurities

Al

content

7.85

2.07

1.66

0.035

0.05

0.025

0.10

margin

[0028] The prepared aluminum alloy raw materials are put into the melting furnace in the order of first high melting point and then low melting point, and then they are evenly mixed and melted into liquid aluminum alloy, and the liquid aluminum alloy is melted and cast into aluminum alloy ingot;

[0029] B. Perform homogenization annealing on the aluminum alloy ingot after melting and casting in step A, wherein the annealing temperature is 464° C., and ...

Embodiment 2

[0035] The difference between embodiment 2 and embodiment 1 is that in step A, the mass percentage ratio of each element of the aluminum alloy plate raw material is as follows:

[0036] element

Embodiment 3

[0038] The difference between Example 3 and Example 1 is that in step B, the aluminum alloy ingot melted and cast in step A is subjected to homogenization annealing, wherein the annealing temperature is 485° C., and the holding time is 4 hours.

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Abstract

The invention belongs to the field of production of aluminum alloy sections, and relates to an ultra-thick high-strength aluminum alloy plate and a preparation method thereof. The ultra-thick high-strength aluminum alloy plate comprises, by mass, 7.85-8.3% of Zn, 2.07-2.10% of Mg, 1.66-1.69% of Cu, 0.035-0.04% of Si, 0.05-0.065% of Fe, 0.025% of Ti, no more than 0.15% of impurities and the balanceAl, wherein the content of each impurity is no more than 0.05%. Casting, homogenizing, extruding, solution treatment, stretcher straightening and multi-stage low-temperature aging treatment are sequentially conducted on high-strength aluminum alloy, and the Mg content, the Cu content and the process parameters in the preparation process are accurately controlled, so that the quenching sensitivityof the prepared aluminum alloy plate is greatly reduced, the mechanical strength and corrosion resistance of the aluminum alloy plate are improved, sections prepared from the aluminum alloy plate canreach the industrial standard, and the product forming rate is greatly increased.

Description

technical field [0001] The invention belongs to the field of aluminum alloy profile production, and relates to an ultra-thick high-strength aluminum alloy plate and a preparation method thereof. Background technique [0002] The 7-series aluminum alloy has the characteristics of low density, high strength, and good processing performance, so it is widely used in the fields of aerospace, aviation, and automobile industries. In recent years, in order to reduce weight and cost, aircraft structural parts are developing in the direction of large-scale and integrated, and there is an urgent demand for 7-series alloy thick plates and forgings with large cross-section and ultra-thickness. [0003] High-strength 7xxx (Al-Zn) aluminum alloy products are widely used in aerospace structural applications, and extra thick plates are usually required for some large components such as wings. However, in high-thickness aluminum alloys, the quenching-related cooling rate in the center of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/10C22F1/053
CPCC22C21/10C22F1/053
Inventor 迟壮田洪超李健刘贵军吕洪伟王志会
Owner YINGKOU ZHONGWANG ALUMINUM CO LTD
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