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Process method for improving conductivity and mechanical property of 7075 aluminum alloy

A process method and conductivity technology, applied in the field of forging thermal processing, to achieve the effect of reducing resource waste

Inactive Publication Date: 2020-10-09
SHAANXI HONGYUAN AVIATION FORGING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After production verification, the invention solves the problem of the corresponding relationship between the electrical conductivity and the longitudinal yield strength of the 7075 alloy that meets the requirements of the AMS-22771 standard by strictly controlling the deformation mode, deformation amount, cold deformation direction and heat treatment system of the forging process

Method used

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Examples

Experimental program
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Effect test

Embodiment Construction

[0027] The invention mainly controls the deformation mode, distribution of deformation amount, cold deformation direction and corresponding heat treatment system of 7075 aluminum alloy during the forging process, and determines the matching process method of electrical conductivity and mechanical properties that meet the standard requirements.

[0028] The technical solution of the present invention will be further described in detail below in conjunction with examples:

[0029] A joint forging used in a certain type of the present invention has a part size of 145×162×450; material: 7075, category I, process regulations require blanking specifications: φ200×350, weight: 30Kg, overall performance indicators and electrical conductivity requirements of forgings Should meet the requirements of the AMS-A-22771 standard.

[0030] The forging steps are detailed as follows:

[0031] The first step: put the material of φ200×350 into the electric furnace at 420°C for 400 minutes;

[0...

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Abstract

The invention relates to a process method for improving the conductivity and the mechanical property of a 7075 aluminum alloy. The process method is characterized by comprising the following steps offeeding; and forging, specifically, carrying out upsetting and drawing out, heat treatment, cold deformation, conductivity, flaw detection and physical and chemical treatment; and the forging procedure comprises a forging deformation and deformation control step and the heat treatment step, and the forging deformation mode is characterized in that a forging is upset to the corresponding deformation, and then the forging is axially drawn out to the size of a forging drawing. Reasonable deformation mode, deformation distribution, cold deformation direction and heat treatment system are set according to standard requirements, physical and chemical requirements required by final delivery of the forging are met, and great resource waste caused by product scrapping is reduced.

Description

technical field [0001] The invention belongs to the field of forging thermal processing, and relates to a process method in which the mechanical property matching of 7075 complies with the AMS-A-22771 standard. Background technique [0002] The 7075 aluminum alloy belongs to the Al-Zn-Mg-Cu superhard aluminum. This alloy has been used in the aircraft manufacturing industry in the late 1940s. It has good plasticity after solution heat treatment and has high strength below 150°C. It has particularly good low-temperature strength. Due to its excellent performance, it is still an ultra-high-strength deformed aluminum alloy that is still widely used in the aviation industry. [0003] With the development of national defense and civilian industries, higher requirements are put forward for the comprehensive performance of aluminum alloys. The indicators such as strength, hardness and plasticity, which have been used to test the performance of aluminum alloys, can no longer fully re...

Claims

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Application Information

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IPC IPC(8): C22F1/053
CPCC22F1/002C22F1/053
Inventor 安苏娟武茜宝
Owner SHAANXI HONGYUAN AVIATION FORGING