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Strengthening and toughening treatment process of ZL205A aluminum alloy

A technology of ZL205A and processing technology, which is applied in heat treatment furnaces, heat treatment equipment, manufacturing tools, etc., can solve the problems of semi-solid metal processing technology such as complex forming process, coarse grain structure, and complicated process, so as to achieve microstructure improvement and production The effect of low cost and simple process

Active Publication Date: 2021-07-02
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The grain refinement effect of modification treatment is obvious, but the type and process of modification agent need to be changed according to different grades of aluminum alloy; the process required by rapid solidification technology is complicated, the preparation cost is high, and it is rarely used in actual production; semi-solid The forming process of metal processing technology is complicated and the production cost is high; although the strength and plasticity can be obviously improved after solution plus aging treatment, the grain structure after treatment is relatively coarse compared with thermomechanical treatment; Too brittle to be strongly plastically deformed at room temperature, must be done at high temperature and consumes a lot of energy
[0005] In summary, the above-mentioned existing casting processes have certain shortcomings in regulating the mechanical properties of ZL205A aluminum alloy. How to effectively improve the mechanical properties of ZL205A aluminum alloy through simple means needs further research.

Method used

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  • Strengthening and toughening treatment process of ZL205A aluminum alloy
  • Strengthening and toughening treatment process of ZL205A aluminum alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A strengthening and toughening treatment process of ZL205A aluminum alloy, comprising the following steps:

[0028] S1, multiple cold rolling and recrystallization annealing treatment

[0029] The commercial ZL205A alloy 10mm thick plate was rolled to 70% of the original thickness by using a cold rolling mill at room temperature; then, the rolled alloy was recrystallized and annealed at 400°C, and after 60min of heat preservation Take it out, water-cooling and quenching; repeat the above-mentioned cold rolling and recrystallization annealing process once again for the cooled sample, and finally obtain a ZL205A (the thickness is 4.9mm at this time) aluminum alloy sheet with a deformation of 51% compared with the original sheet;

[0030] S2, solid solution treatment

[0031] The aluminum alloy sheet obtained in S1 was subjected to solution treatment at 500°C, taken out after heat preservation for 2 hours, and water-cooled and quenched to obtain a toughened ZL205A alloy. ...

Embodiment 2

[0033] A strengthening and toughening treatment process of ZL205A aluminum alloy, comprising the following steps:

[0034] S1, multiple cold rolling and recrystallization annealing treatment

[0035] The commercial ZL205A alloy 30mm thick plate was rolled to 70% of the original thickness by multi-pass cold rolling mill at room temperature; then, the rolled alloy was recrystallized and annealed at 420°C, and after 90min of heat preservation Take it out, water-cooling and quenching; repeat the above-mentioned cold rolling and recrystallization annealing process twice for the cooled sample, and finally obtain a ZL205A aluminum alloy sheet with a deformation of 65.7% (the thickness is 10.29mm at this time) compared with the original sheet;

[0036] S2, solid solution treatment

[0037] The aluminum alloy sheet obtained in S1 was subjected to solution treatment at 530° C., taken out after heat preservation for 1 hour, and water-cooled and quenched to obtain a toughened ZL205A allo...

Embodiment 3

[0039] The aluminum alloy plate obtained in Example 1 is cold-rolled at room temperature to 90% of the thickness of the plate treated in Example 1, and then the rolled alloy is subjected to aging annealing at 180° C. and kept for 1 h Finally, it is taken out, water-cooled and quenched to obtain a pre-strained and aging-treated ZL205A alloy.

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Abstract

The invention discloses a strengthening and toughening treatment process of a ZL205A aluminum alloy, and belongs to the technical field of alloy preparation. The strengthening and toughening treatment process comprises the following steps that S1, at room temperature, a ZL205A aluminum alloy plate is rolled until the thickness is 50%-85% of the original thickness, and then the rolled plate is recrystallized and annealed at 350-550 DEG C; the rolling and recrystallization annealing processes are repeated for multiple times, and the ZL205A aluminum alloy plate with the total deformation being 27%-75% is obtained; and S2, the plate treated in the step S1 is placed at the temperature of 450-550 DEG C for heat preservation, and a strengthened and toughened ZL205A aluminum alloy plate is prepared. According to the strengthening and toughening treatment process, through multiple times of cold rolling recrystallization annealing treatment and solution treatment, the Al2Cu phase of the ZL205A alloy is obviously refined, and the strength and plasticity of the alloy material are both improved.

Description

technical field [0001] The invention belongs to the technical field of alloy preparation, and in particular relates to a strengthening and toughening treatment process of ZL205A aluminum alloy. Background technique [0002] Among non-ferrous metals, aluminum and aluminum alloys are the most commonly used metal structural materials. However, the strength of pure aluminum in industry is very low, so it is not suitable for use as a structural component for bearing. Usually, a certain proportion of alloying elements is added to pure aluminum to obtain an aluminum alloy with high strength and good casting performance. Aluminum alloys can be divided into cast aluminum alloys and deformed aluminum alloys according to the forming process. Among them, cast aluminum alloys refer to aluminum alloys made of parts or blanks by gravity casting or die casting. Cast aluminum alloys contain relatively large amounts of alloying elements, accounting for 5% to 25% of the total mass fraction. ...

Claims

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Application Information

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IPC IPC(8): C22F1/057C21D8/02C21D1/26C21D1/18C21D9/00
CPCC22F1/057C21D8/0236C21D8/0468C21D1/26C21D1/18C21D9/0081C22F1/002
Inventor 王志军刘林翔朱超李俊杰王锦程
Owner NORTHWESTERN POLYTECHNICAL UNIV