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Method for preparing high-strength wrought aluminum alloy based on severe plastic deformation

A technology of severe plastic deformation and deformation of aluminum alloy, which is applied in the field of aluminum alloy processing, can solve problems such as unfavorable alloy strength and toughness, weakening of thermal processing effect, and fine grain growth, so as to achieve small grain size, improve processing performance, and reduce content Effect

Active Publication Date: 2019-12-20
江苏江南创佳型材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the enhanced solution treatment after hot working tends to make the formed fine grains grow, which weakens the effect of hot working to a certain extent.
Although it has a significant effect on improving the corrosion performance of aluminum alloys, it is not conducive to the further improvement of alloy strength and toughness.

Method used

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  • Method for preparing high-strength wrought aluminum alloy based on severe plastic deformation
  • Method for preparing high-strength wrought aluminum alloy based on severe plastic deformation
  • Method for preparing high-strength wrought aluminum alloy based on severe plastic deformation

Examples

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preparation example Construction

[0030] Such as Figure 1-2 Shown: a preparation method of a high-strength deformed aluminum alloy based on severe plastic deformation, the steps of the preparation method are as follows:

[0031] A. Ingot cutting: Cut a billet with a size of 50mm×50mm×100mm from an aluminum alloy ingot with aging strengthening effect;

[0032] B. Severe plastic processing with variable temperature: Place the billet in the rotary die and other channel angular extrusion molds, and use the multi-temperature steps that gradually increase the temperature to continuously perform equal channel angular extrusion processing, and the medium channel angular extrusion processing is generally divided into three stage; the first stage is equal-channel angular extrusion processing in the middle temperature stage, the processing temperature is 400-420 ° C, and the processing pass is 1 pass; the second stage is equal-channel angular extrusion processing in the heating stage, the processing temperature is 430-4...

Embodiment 1

[0038] The 2024 aluminum alloy ingot is cut into a billet with a size of 50mm×50mm×100mm; the billet is placed in a rotary equal-channel angular extrusion die for continuous equal-channel angular extrusion processing, and the first-pass processing temperature is 400°C , The processing temperature of the second pass is 440°C, the processing temperature of the third and fourth passes is 470°C, and then quenched in water to obtain a supersaturated solid solution block extrusion billet; cut out the diameter from the above block extrusion billet It is a 45mm alloy rod, and the length direction of the alloy rod is parallel to the direction of equal channel angular extrusion; the alloy rod is subjected to subsequent conventional hot extrusion processing and aging treatment to obtain a high-strength deformed aluminum alloy based on severe plastic deformation.

Embodiment 2

[0040] Cut the 2024 aluminum alloy ingot into a billet with a size of 50mm×50mm×100mm; the billet is placed in a rotary die and equal channel corner extrusion die for continuous equal channel corner extrusion processing, and the first pass processing temperature is 410°C , The processing temperature of the second pass is 450°C, the processing temperature of the third and fourth passes is 480°C, and then quenched in water to obtain a supersaturated solid solution block extrusion billet; cut out the diameter from the above block extrusion billet It is a 45mm alloy rod, and the length direction of the alloy rod is parallel to the direction of equal channel angular extrusion; the alloy rod is subjected to subsequent conventional hot extrusion processing and aging treatment to obtain a high-strength deformed aluminum alloy based on severe plastic deformation.

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Abstract

The invention discloses a method for preparing a high-strength wrought aluminum alloy based on severe plastic deformation. The method comprises the following steps that A, a blank is cut out from an aluminum alloy cast ingot; B, the blank is put into a rotary die equal channel angular pressing die, equal channel angular pressing processing is continuously carried out by adopting multi-temperaturestages of step-by-step temperature rise, strengthened solid solution treatment is realized by using a severe plastic deformation technology, and after completion, water quenching treatment is carriedout so as to obtain a supersaturated solid solution block extrusion billet; and C, an alloy bar with the length direction parallel to the equal-channel angular pressing direction is cut out, and conventional hot extrusion processing and aging treatment are carried out on the alloy bar so as to obtain the high-strength wrought aluminum alloy. According to the method, strengthened solid solution treatment is realized through staged severe plastic deformation of step-by-step temperature rise, a second phase is effectively promoted to dissolve, a single-phase solid solution alloy with fine grain size, high density defects and high supersaturation degree is obtained, then uniform precipitation of a nano precipitation phase is promoted through hot working and aging treatment, and the high-strength wrought aluminum alloy is obtained.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloy processing, and specifically relates to a method for preparing a high-strength deformed aluminum alloy based on severe plastic deformation, which adopts severe plastic deformation to achieve enhanced solid solution effect, and combines subsequent thermal processing to prepare precipitated phase reinforcement. Background technique [0002] Aluminum alloy is one of the most commonly used metal materials in the fields of aircraft, automobiles, rail transit and 3C electronic products, especially 2XXX series, 6XXX series and 7XXX series aluminum alloys are more widely used in the above fields. The strength of these three series of aluminum alloys is usually high, and the main strengthening methods include solid solution strengthening, fine grain strengthening, deformation strengthening and second phase strengthening. In addition, these three alloys are all heat treatable aluminum alloys, that is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/04
CPCC22F1/04
Inventor 梅泽锋周宝华黄晓中董春泉
Owner 江苏江南创佳型材有限公司
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