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Forging and heat treating technology of 7085 aluminum alloy

An aluminum alloy and process technology, applied in the field of process forming and heat treatment, can solve problems such as inability to be widely promoted and applied, poor plasticity and stress corrosion resistance, and inability to meet application requirements, so as to improve stress corrosion resistance and ensure High-strength properties, improving the effect of stress corrosion resistance

Active Publication Date: 2016-12-21
WUXI PAIKE HEAVY CASTING & FORGING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

To a certain extent, it solves the problems of low overall strength and poor stress corrosion resistance of existing aluminum alloys
[0003] Most of the existing aluminum alloys are 2XXX aluminum alloys, with a strength of about 400MPa, which cannot meet the requirements of use. The 7XXX series aluminum alloys that have been studied have high strength, but poor plasticity and stress corrosion resistance, and cannot be widely promoted. and application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The first step: purchase the blank, which is an aluminum alloy ingot with a height-to-diameter ratio of less than 2.5;

[0042] The second step: cutting off the blank and blanking;

[0043] The third step: forging heating: it is required to enter the furnace at room temperature, heat to 440±5°C, and keep warm for 6-10h;

[0044] Step 4: Billet making: Preheat the equipment tooling to 300-350°C before making the billet, and apply lubricant to the equipment tooling, and use a number of forging technologies to upset the heated billet into a round cake, and carry out the round cake punching;

[0045] Step 5: Machining the inner hole: After the punched blank is air-cooled to room temperature, the skinning defects caused by the inner hole during the punching process are processed;

[0046] Step 6: Heating: Reheat the processed billet to 440±5°C and keep it warm for 8-12h;

[0047] The seventh step: horse frame hole expansion: the heated blank is forged by free forging hors...

Embodiment 2

[0056] The first step: purchase the billet, which is an aluminum alloy ingot with a height-to-diameter ratio of 2.3;

[0057] The second step: cutting off the blank and blanking;

[0058] The third step: forging heating: put into the furnace at room temperature, heat to 445 ° C, and keep it for 10 hours;

[0059] Step 4: Billet making: Preheat the equipment tooling to 350°C before making the billet, and apply lubricant to the equipment tooling, and use a number of forging techniques to upset the heated billet into a round cake, and punch the round cake ;

[0060] Step 5: Machining the inner hole: After the punched blank is air-cooled to room temperature, the skinning defects caused by the inner hole during the punching process are processed;

[0061] Step 6: Heating: Reheat the processed billet to 445°C and keep it warm for 12 hours;

[0062] The seventh step: horse frame hole expansion: the heated blank is forged by free forging horse frame hole expansion method, and the rol...

Embodiment 3

[0071] The first step: purchase the blank, which is an aluminum alloy ingot with a height-to-diameter ratio of 1.5;

[0072] The second step: cutting off the blank and blanking;

[0073] The third step: forging heating: it is required to enter the furnace at room temperature, heat to 435 ° C, and keep it for 6 hours;

[0074] Step 4: Billet making: Preheat the equipment tooling to 300°C before making the billet, and apply lubricant to the equipment tooling, and use a number of forging techniques to upset the heated billet into a round cake, and punch the round cake ;

[0075] Step 5: Machining the inner hole: After the punched blank is air-cooled to room temperature, the skinning defects caused by the inner hole during the punching process are processed;

[0076] Step 6: Heating: Reheat the processed billet to 435°C and keep it warm for 8 hours;

[0077] The seventh step: horse frame hole expansion: the heated blank is forged by free forging horse frame hole expansion metho...

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Abstract

The invention relates to a forging and heat treating technology of 7085 aluminum alloy. The forging and heat treating technology comprises the following operation steps of blank material purchasing, blank material cutting and discharging, forging and heating, blank making, inner bore machining, heating, mandrel supporter bore broadening, remelting and heating, ring rolling, cooling, solid solution, cold deformation, aging and machining to the required size. According to the forging and heat treating technology, operation is convenient, transgranular precipitates and grain boundary precipitates are regulated and controlled through a multi-step aging technique under the condition of ensuring the strength, and the stress resistance and the corrosion resistance are promoted.

Description

technical field [0001] The invention relates to the technical field of process forming and heat treatment, in particular to a forging and heat treatment process of 7085 aluminum alloy. Background technique [0002] With the rapid development of the aerospace industry, the strength of 2XXX aluminum alloys can no longer meet the demand, so high-strength 7XXX aluminum alloys have become the focus of research. The invention mainly introduces a forging and heat treatment process of 7085 aluminum alloy. The range of 7085 series ultra-high-strength aluminum alloy is high in alloying degree. excellent mechanical properties. To a certain extent, the problems of low overall strength and poor stress corrosion resistance of existing aluminum alloys are solved. [0003] Most of the existing aluminum alloys are 2XXX aluminum alloys, with a strength of about 400MPa, which cannot meet the requirements of use. The 7XXX series aluminum alloys that have been studied have high strength, but p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/053
CPCC22F1/053
Inventor 何方有刘智刘其源王骏许亮李姚君丁佐军郑卓郜均虎
Owner WUXI PAIKE HEAVY CASTING & FORGING
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