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6 series aluminum alloy and technology for preparing prestretching board thereof

A preparation process and aluminum alloy technology, which is applied in the field of preparation process of 6-series aluminum alloy and its pre-stretched sheet, which can solve the problem of difficulty in the sufficient and uniform precipitation of the second phase, control of the content of the second phase, and abnormal grain size Growth and other issues, to achieve the effect of optimizing pass reduction rate, controlling grain size, and reducing composition segregation

Active Publication Date: 2016-12-07
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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  • 6 series aluminum alloy and technology for preparing prestretching board thereof
  • 6 series aluminum alloy and technology for preparing prestretching board thereof
  • 6 series aluminum alloy and technology for preparing prestretching board thereof

Examples

Experimental program
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Effect test

Embodiment 1

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

[0035] (1) Prepare 6 series aluminum alloy, 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%, the others are Al and some unavoidable impurity elements. Then, after degassing and filtering, they are cast, soaked, and preheated in order to cast into a slab with a thickness of 550mm ; Then the slab is subjected to soaking treatment at a temperature of 515 ℃, the heating rate is 60 ℃ / h, after reaching the specified temperature, the temperature is kept for 19 hours, and then cooled to room temperature. The obtained slab is cut off the head and tail and peeled to obtain the thickness For slabs of 525~535mm, preheated at 465℃ for 13.5h;

[0036] (2) The 6 series aluminum alloy slab obtained after preheating in step (1) is hot-rolled to a slab with a thickness of 70mm. The...

Embodiment 2

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

[0045] (1) Prepare 6 series aluminum alloy, and its composition according to weight percentage: 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%, the others are Al and some unavoidable impurity elements. Then, after degassing and filtering, they are cast, soaked, and preheated in order to cast a 400mm thick slab ; Then the slab is subjected to soaking treatment at a temperature of 460℃, the heating rate is 40℃ / h, and after reaching the specified temperature, it is kept for 30h and cooled to room temperature. After cutting the head and tail of the obtained slab and peeling, the thickness is Slabs of 380~390mm, keep the temperature at 420℃ for 25h;

[0046] (2) Hot-rolling the 6-series aluminum alloy slab obtained after preheating in step (1) to a slab with a finished thickness of 160mm, the hot-rolling third-to-last pas...

Embodiment 3

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

[0052] (1) Prepare 6 series aluminum alloy, and its composition according to weight percentage: 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%, the others are Al and some unavoidable impurity elements. After degassing and filtering, they are cast, soaked, and preheated in order to cast a 700mm thick slab ; Then the slab is subjected to soaking treatment at a temperature of 570 ℃, the heating rate is 80 ℃ / h, after reaching the specified temperature, the temperature is kept for 8 hours, and then cooled to room temperature. The obtained slab is cut off the head and tail and peeled to obtain the thickness For slabs of 680~690mm, preheat at 510℃ for 2h;

[0053] (2) Hot-rolling the 6 series aluminum alloy slab obtained after preheating in step (1) to a slab with a finished thickness of 30mm, the hot rolling third-to-last pas...

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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 an alloy and a preparation process of a pre-stretched plate, in particular to a preparation process of a 6-series aluminum alloy and a pre-stretched plate. Background technique [0002] The 6-series aluminum alloy is a high-quality aluminum alloy product produced by heat treatment and pre-stretching processes. It has many characteristics of magnesium and silicon alloys, has excellent processing performance, and excellent welding characteristics; excellent electroplating, good corrosion resistance, and toughness High and no deformation after processing; compact material without defects and easy to polish. This alloy is widely used in mechanical parts, structural engineering, modern construction, transportation and other fields. Therefore, it is a general trend to replace steel with aluminum in these fields, and the demand is large. [0003] The traditional process for preparing 6-series T651 has the following disadvantages: (1) It is ...

Claims

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Application Information

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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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