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

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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

The invention belongs to the technical field of metal material heat treatment and discloses a technological method for current solution treatment and aging heat treatment for 7050 aluminum alloy. The technological method specifically comprises the steps of 1, homogenization treatment, wherein direct currents are conducted on 7050 aluminum alloy cast ingots and the 7050 aluminum alloy cast ingots undergo the homogenization treatment simultaneously and are air-cooled to the indoor temperature; 2, hot extrusion; 3, the solution treatment, wherein alternating currents are conducted to square billets and the square billets undergo the solution treatment simultaneously and are water-cooled at the indoor temperature; 4, the aging treatment, wherein the alternating currents are conducted on the square billets and the square billets undergo the aging treatment simultaneously. According to the technological method, the current intensity, the homogenization, the heating temperature for the solution treatment and the aging treatment and the heat preservation time are reasonably controlled, the solution strengthening effect is obvious on the premise of obviously lowering the heat treatment energy consumption, and work-pieces excellent in mechanical property can be obtained finally and can be applied to 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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