Method for preparing high-elongation cast-rolled Al-Mn series aluminum alloy slab

A technology of high elongation and aluminum alloy, which is applied in the field of preparing high elongation cast-rolled Al-Mn series aluminum alloy slabs, can solve the problems of longer process flow and increased time consumption, and achieve reduction of process flow, slight segregation, The effect of reducing production costs

Inactive Publication Date: 2020-10-30
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the cast-rolled aluminum alloys currently produced in industry are often subjected to homogenization heat treatment before rolling to reduce segregation, but this will lead to a longer process and increased time-consuming

Method used

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  • Method for preparing high-elongation cast-rolled Al-Mn series aluminum alloy slab
  • Method for preparing high-elongation cast-rolled Al-Mn series aluminum alloy slab
  • Method for preparing high-elongation cast-rolled Al-Mn series aluminum alloy slab

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] (1) Melting

[0062] Smelting is carried out according to the mass percentage of components: Si: 0.5%, Mn: 1.2%, and the balance is Al; the calculated corresponding mass of industrial pure aluminum ingots, aluminum-manganese intermediate alloys, and aluminum-silicon intermediate alloys are sequentially added to the melting furnace In the process, the melting temperature is 720°C to obtain molten aluminum for casting and rolling, adding 0.1% TiB 2 -TiC particles, keep warm for 5 minutes, then add slag remover, remove slag and degas;

[0063] (2) Casting and rolling

[0064] The obtained molten aluminum is subjected to twin-roll vertical casting and rolling. The casting temperature is 700°C, the casting and rolling speed is 12m / min, the roll gap width is 0.3mm, and the rolls are copper leather rolls, which are cooled by circulating water to obtain the thickness. 1mm cast-rolled plate, trimming after cooling;

[0065] (3) rolling deformation

[0066] The obtained cast-...

Embodiment 2

[0072] (1) Melting

[0073] Smelting is carried out according to the mass percentage of components: Si: 0.5%, Mn: 1.2%, and the balance is Al; the calculated corresponding mass of industrial pure aluminum ingots, aluminum-manganese intermediate alloys, and aluminum-silicon intermediate alloys are sequentially added to the melting furnace In the process, the melting temperature is 750°C, and the molten liquid for casting and rolling is obtained, and 0.5% TiB is added 2 -TiC particles, keep warm for 15 minutes, then add slag remover, remove slag and degas;

[0074] (2) Casting and rolling

[0075] The obtained molten aluminum is subjected to twin-roll vertical casting and rolling, the casting and rolling pouring temperature is 680°C, the casting and rolling speed is 5m / min, the roll gap width is 2.5mm, and the rolls are copper leather rolls, which are cooled by circulating water to obtain the thickness It is a 3mm cast-rolled plate, which is trimmed after cooling;

[0076] (3...

Embodiment 3

[0083] (1) Melting

[0084] Smelting is carried out according to the mass percentage of components: Si: 0.5%, Mn: 1.2%, and the balance is Al; the calculated corresponding mass of industrial pure aluminum ingots, aluminum-manganese intermediate alloys, and aluminum-silicon intermediate alloys are sequentially added to the melting furnace In the process, the melting temperature is 750°C to obtain molten liquid for casting and rolling, and 0.9% TiB is added 2 -TiC particles, keep warm for 30 minutes, then add slag remover, remove slag and degas;

[0085] (2) Casting and rolling

[0086] The obtained molten aluminum is subjected to double-roller vertical casting and rolling. The casting temperature is 670°C, the casting-rolling speed is 8m / min, the roll gap width is 3mm, and the rolls are copper leather rolls, which are cooled by circulating water to obtain a thickness of 4mm cast-rolled plate, trimming after cooling;

[0087] (3) rolling deformation

[0088] The obtained cas...

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Abstract

The invention discloses a method for preparing a high-elongation cast-rolled Al-Mn alloy slab with a short process. The chemical compositions and mass percentages of the cast-rolled Al-Mn alloy are asfollows: less than or equal to 0.6% of Si; less than or equal to 0.7% of Fe; 0.05 to 0.20% of Cu; 1.0 to 1.5% of Mn; less than or equal to 0.10% of Zn; and the rest is Al. The method comprises the following steps of step (1), smelting, adding 0.1 to 0.9% of TiB2-TiC ceramic particles into an aluminum melt; step (2), cast rolling, wherein the numerical range of the cast rolling speed x roll gap width x (cast rolling casting temperature -654 DEG C) is between 150 and 600, and the unit is 1000 DEG C.mm2/min; step (3), cold rolling deformation; and step (4), annealing. The method of the inventionhas the advantages of being short in process, low in energy consumption, green and environmentally friendly, and fine in alloy grains compared with a conventional method of producing slabs by cold rolling a cast ingot after breaking down and hot rolling the cast ingot.

Description

technical field [0001] The invention relates to a method for preparing a cast-rolled Al-Mn aluminum alloy slab with high elongation, and belongs to the field of aluminum alloy slab preparation. Background technique [0002] 3XXX aluminum alloy, with Mn as the main alloying element, is a non-heat-treatable alloy with good formability, weldability, and corrosion resistance. It is often used in aluminum foil for containers, fuel tanks, transportation tanks, and food packaging. [0003] At present, there are two commonly used methods for producing aluminum alloy slabs in industry, semi-continuous casting and rolling and continuous casting and rolling. However, the process steps of the semi-continuous casting and rolling method are cumbersome and require multiple processes such as smelting, casting, billet opening, face milling, and hot rolling, which consumes a lot of energy and takes a long time. The casting and rolling method has the advantages of low investment cost, short p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/00C22C32/00C22C1/10B22D11/06C22F1/04
CPCC22C21/00C22C32/0047C22C1/1036B22D11/0622B22D11/003C22F1/04C22C1/1073
Inventor 赵庆龙纪振威姜启川
Owner JILIN UNIV
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