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A kind of preparation technology of 6 series aluminum alloy and its pre-stretched plate

An aluminum alloy and pre-stretching technology, which is applied in the field of preparation technology of 6-series aluminum alloy and its pre-stretched sheet, can solve the problem that the second phase is not easy to fully and uniformly precipitate, the grain size grows abnormally, and the second phase is not easy Content control and other issues to achieve the effect of optimizing pass reduction rate, reducing component segregation, and controlling grain size

Active Publication Date: 2018-03-16
广西南南铝加工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The process of preparing 6-series T651 by the traditional process has the following disadvantages: (1) It is not easy to control the content of the second phase during the alloy preparation process, and it is not easy to fully and uniformly precipitate the second phase, resulting in low performance and abnormal grain size growth; (2) The deformation of the alloy sheet is uneven, and the internal energy storage is uneven, which directly affects the size of the grain structure and the abnormal growth of the grain size after solution quenching; (3) The surface of the alloy sheet is orange-peel-like after stretching Severe texture affects the appearance of the alloy sheet

Method used

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  • A kind of preparation technology of 6 series aluminum alloy and its pre-stretched plate
  • A kind of preparation technology of 6 series aluminum alloy and its pre-stretched plate
  • A kind of preparation technology of 6 series aluminum alloy and its pre-stretched plate

Examples

Experimental program
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Effect test

Embodiment 1

[0034] A preparation process for a 6-series aluminum alloy pre-stretched plate, the operation steps are as follows:

[0035] (1) The 6-series aluminum alloy is prepared, and its composition according to weight percentage is: Mg: 1.22%, Mn: 0.15%, Si: 0.72%, Cr: 0.27%, Zr: 0.11%, Cu: 0.26%, Fe: 0.25 %, Zn: 0.19%, Ti: 0.09%, others are Al and some unavoidable impurity elements, and then after degassing and filtering, casting, soaking treatment, and preheating are carried out in sequence, that is, casting into a flat ingot with a thickness of 550mm ;Then the slab is subjected to soaking treatment at a temperature of 515°C, the heating rate is 60°C / h, and after reaching the specified temperature, it is kept for 19h, cooled to room temperature, and the head and tail of the obtained slab are cut off and peeled to obtain the thickness For flat ingots of 525-535mm, keep the temperature at 465°C and preheat for 13.5h;

[0036] (2) Hot-roll the 6-series aluminum alloy flat ingot obtain...

Embodiment 2

[0044] A preparation process for a 6-series aluminum alloy pre-stretched plate, the operation steps are as follows:

[0045] (1) The 6 series aluminum alloy is prepared, and its composition according to weight percentage is: Mg: 0.9%, Mn: 0.08%, Si: 0.52%, Cr: 0.18%, Zr: 0.005%, Cu: 0.05%, Fe: 0.32 %, Zn: 0.25%, Ti: 0.08%, others are Al and some unavoidable impurity elements, and then after degassing and filtering, casting, soaking treatment, and preheating are carried out in turn, that is, casting into a flat ingot with a thickness of 400mm Then, the slab is subjected to soaking treatment at a temperature of 460°C, the heating rate is 40°C / h, and after reaching the specified temperature, it is kept for 30 hours and cooled to room temperature. For flat ingots of 380-390mm, keep the temperature at 420°C and preheat for 25 hours;

[0046] (2) Hot-roll the 6-series aluminum alloy flat ingot obtained after preheating in step (1), and roll it to a slab with a finished thickness of...

Embodiment 3

[0051] A preparation process for a 6-series aluminum alloy pre-stretched plate, the operation steps are as follows:

[0052] (1) The 6 series aluminum alloy is prepared, and its composition according to weight percentage is: Mg: 1.3%, Mn: 0.25%, Si: 0.9%, Cr: 0.32%, Zr: 0.06%, Cu: 0.35%, Fe: 0.25 %, Zn: 0.19%, Ti: 0.1%, others are Al and some unavoidable impurity elements, and then after degassing and filtering, casting, soaking treatment, and preheating are carried out in sequence, that is, casting into a flat ingot with a thickness of 700mm Then, the slab is subjected to soaking treatment at a temperature of 570°C, the heating rate is 80°C / h, and after reaching the specified temperature, it is kept for 8 hours, and cooled to room temperature. For flat ingots of 680-690mm, keep the temperature at 510°C and preheat for 2 hours;

[0053] (2) Hot-roll the 6-series aluminum alloy flat ingot obtained after preheating in step (1), and roll it to a slab with a finished thickness of...

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Abstract

The invention discloses 6 series aluminum alloy. The 6 series aluminum alloy comprises, by weight, Mg, Mn, Si, Cr, Zr, Cu, 0-0.32% of Fe, 0-0.25% of Zn, 0-0.1% of Ti, and the balance Al and certain inevitable impurity elements. A technology for preparing a prestretching board of the 6 series aluminum alloy includes the steps that (1) the 6 series aluminum alloy is prepared, and casting, soaking treatment and preheating are performed in sequence; (2) hot rolling and cooling are conducted; and (3) solution hardening is carried out, and accordingly the prestretching board can be obtained. By the adoption of the technology for preparing the 6 series aluminum alloy and the prestretching board thereof, the strength of the alloy board is effectively improved, the structural organization and energy storage condition inside the alloy are improved, and grain refinement is realized; and the strength and plasticity of the alloy board are improved, and bending and cracking are reduced. Through the step-by-step interaction and influence in the method, the grain size can be effectively controlled, the rugged orange peel phenomenon of the alloy board surface after stretching is eliminated, and the mechanical property and surface quality of the board are improved.

Description

technical field [0001] The invention relates to a preparation process of an alloy and a pre-stretched plate thereof, in particular to a preparation process of a 6-series aluminum alloy and a pre-stretched plate thereof. Background technique [0002] 6 series aluminum alloy is a high-quality aluminum alloy product produced by heat treatment and pre-stretching process. It has many characteristics of magnesium and silicon alloys, excellent processing performance and excellent welding characteristics; excellent electroplating performance, good corrosion resistance and toughness High and no deformation after processing; the material is dense and defect-free and easy to polish and other excellent characteristics. The alloy is widely used in mechanical parts, structural engineering, modern architecture, transportation and other fields. Therefore, it is the trend of the times to replace steel with aluminum in these fields, and the demand is large. [0003] The process of preparing ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/08C22F1/047
CPCC22C21/08C22F1/002C22F1/047
Inventor 赵启忠何建贤何克准黄颖马英义
Owner 广西南南铝加工有限公司
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