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A kind of process method of current solution aging heat treatment of 7050 aluminum alloy

A technology of solid solution aging and process method, which is applied in the field of heat treatment of metal materials, can solve the problems of low current aging of aluminum alloys, achieve excellent mechanical properties, reduce energy consumption, and achieve significant solid solution strengthening effects

Active Publication Date: 2017-09-05
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, current treatment is mostly used in Cu-Cr-Zr and steel materials, and there are very few applications on aluminum alloy current aging.

Method used

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  • A kind of process method of current solution aging heat treatment of 7050 aluminum alloy
  • A kind of process method of current solution aging heat treatment of 7050 aluminum alloy
  • A kind of process method of current solution aging heat treatment of 7050 aluminum alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The process method of electric current solution aging heat treatment of 7050 aluminum alloy specifically includes the following steps:

[0032] Step 1, Homogenization:

[0033] Put the 7050 aluminum alloy as-cast round bar with a size of Φ160×160mm into the air circulation heat treatment furnace, feed 500A direct current through copper fixtures to both ends of the ingot, heat it to 460°C, keep it warm for 20h, stop the current flow, Cool the furnace to room temperature in air to obtain an ingot;

[0034] Step 2, hot extrusion:

[0035] Put the ingot into the heating furnace, preheat it to 500°C, keep it warm for 2 hours, take it out of the furnace and carry out extrusion molding to obtain a billet with a size of 10×200×12000mm, wherein the extrusion speed is 3.0mm / s and the extrusion ratio 10, the extruded billet is air-cooled and cut;

[0036] Step 3, solution treatment:

[0037] Put the square billet with the size of 10×20×580mm into the air circulation heat treat...

Embodiment 2

[0041] The process method of electric current solution aging heat treatment of 7050 aluminum alloy specifically includes the following steps:

[0042] Step 1, Homogenization:

[0043] Put the cast 7050 aluminum alloy round bar with a size of Φ160×160mm into the air circulation heat treatment furnace, feed 500A direct current through copper fixtures to both ends of the ingot, heat it to 456°C, keep it warm for 22h, stop the current flow, Cool the furnace to room temperature in air to obtain an ingot;

[0044] Step 2, hot extrusion:

[0045] Put the ingot into the heating furnace, preheat it to 500°C, keep it warm for 2 hours, take it out of the furnace and carry out extrusion molding to obtain a billet with a size of 10×200×12000mm, wherein the extrusion speed is 3.0mm / s and the extrusion ratio 10, the extruded billet is air-cooled and cut;

[0046] Step 3, solution treatment:

[0047] Put the billet with the size of 10×20×580mm into the air circulation heat treatment furna...

Embodiment 3

[0051] The process method of electric current solution aging heat treatment of 7050 aluminum alloy specifically includes the following steps:

[0052] Step 1, Homogenization:

[0053]Put the cast 7050 aluminum alloy round bar with a size of Φ160×160mm into the air circulation heat treatment furnace, feed 500A direct current through copper fixtures to both ends of the ingot, heat it to 470°C, keep it warm for 24 hours, stop the current flow, Cool the furnace to room temperature in air to obtain an ingot;

[0054] Step 2, hot extrusion:

[0055] Put the ingot into the heating furnace, preheat it to 500°C, keep it warm for 2 hours, take it out of the furnace and carry out extrusion molding to obtain a billet with a size of 10×200×12000mm, wherein the extrusion speed is 3.0mm / s and the extrusion ratio 10, the extruded billet is air-cooled and cut;

[0056] Step 3, solution treatment:

[0057] Put the square billet with the size of 10×20×580mm into the air circulation heat trea...

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Abstract

A current solid solution aging heat treatment process method for 7050 aluminum alloy, which belongs to the technical field of metal material heat treatment and specifically includes: (1) Homogenization treatment: while passing direct current into the 7050 aluminum alloy ingot, homogenization treatment is performed, and air cooling is carried out to Room temperature; (2) Hot extrusion: (3) Solution treatment: While the billet is supplied with alternating current, solution treatment is performed, and water cooling is performed at room temperature; (4) Aging treatment: While the billet is supplied with alternating current, it is processed Time processing. The process method of the present invention reasonably controls the heating temperature and holding time of current intensity, homogenization, solid solution treatment and aging treatment, and obtains significant solid solution strengthening effect on the premise of significantly reducing heat treatment energy consumption, and finally obtains excellent mechanical properties. Workpieces used in industrial production.

Description

technical field [0001] The invention belongs to the technical field of heat treatment of metal materials, and in particular relates to a process method of current solution aging heat treatment of 7050 aluminum alloy. Background technique [0002] Aluminum alloys are mainly strengthened by aging precipitation, and the solution treatment before aging has an important influence on the subsequent aging process. Therefore, the purpose of improving the strengthening effect is often achieved by increasing the supersaturation degree of the alloy solid solution and increasing the number of aging precipitates. . The solid solution temperature of the traditional deformed structure is much lower than the non-equilibrium eutectic point, resulting in the incomplete dissolution of the coarse compound phase, which will have an adverse effect on the overall performance of the alloy. The degree of solute supersaturation obtained by alloy quenching is related to both the composition of the al...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22F1/057
CPCC22F1/057
Inventor 何立子朱颖晖崔建忠郭雅萍
Owner NORTHEASTERN UNIV LIAONING
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