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A kind of preparation method of 6181 aluminum alloy plate

A technology for aluminum alloy plates and aluminum alloy ingots, which is applied in the field of aluminum alloys, can solve the problems of reducing the formability of plates, increasing production costs, and reducing production efficiency, and achieves the effects of improving deep drawing performance, increasing production efficiency, and saving energy

Active Publication Date: 2018-04-06
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The homogenization treatment temperature of 6181 aluminum alloy ingots generally exceeds 540 ° C, and the holding time exceeds 12 hours, which not only consumes time and energy, but also seriously reduces production efficiency and significantly increases production costs. The excess crystalline phase is spheroidized, coarsened and distributed along the dendrite boundary, which may reduce the formability of subsequent sheets

Method used

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  • A kind of preparation method of 6181 aluminum alloy plate
  • A kind of preparation method of 6181 aluminum alloy plate
  • A kind of preparation method of 6181 aluminum alloy plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A preparation method of 6181 aluminum alloy plate, comprising the following steps:

[0029] (1) Ingot preparation: 6181 aluminum alloy ingots were prepared by direct water-cooling semi-continuous casting, with a thickness of 180mm, and the ingredients and their mass percentages were: Si: 0.82%, Mg: 0.99%, Cu≤0.10%, Mn≤ 0.15%, Fe≤0.45%, Zn≤0.20%, Cr≤0.10%, Ti≤0.10%, impurity elements≤0.15%, the balance is Al;

[0030] (2) Heating: After the 6181 aluminum alloy ingot is cut and milled, it is heated to 430 ° C in a circulating air furnace and kept for 4 hours;

[0031] (3) Hot rolling: hot rolling the 6181 aluminum alloy ingot after heat preservation, first rolling 4 passes along the width direction of the slab ingot, and then rolling 15 passes along the length direction of the slab ingot to obtain Hot-rolled plate, the thickness of the hot-rolled plate is 3mm;

[0032] (4) Intermediate annealing: After cutting the hot-rolled sheet to length, heat it to 425°C in a circul...

Embodiment 2

[0053] A preparation method of 6181 aluminum alloy plate, comprising the following steps:

[0054] (1) Ingot preparation: 6181 aluminum alloy ingots were prepared by direct water-cooling semi-continuous casting, with a thickness of 100mm, and the ingredients and their mass percentages were: Si: 0.80%, Mg: 1.00%, Cu≤0.10%, Mn≤ 0.15%, Fe≤0.45%, Zn≤0.20%, Cr≤0.10%, Ti≤0.10%, impurity elements≤0.15%, the balance is Al;

[0055] (2) Heating: After the 6181 aluminum alloy ingot is cut and milled, it is heated to 425 ° C in a circulating air furnace and kept for 6 hours;

[0056] (3) Hot rolling: hot rolling the 6181 aluminum alloy ingot after heat preservation, first rolling 4 passes along the width direction of the slab ingot, and then rolling 11 passes along the length direction of the slab ingot to obtain Hot-rolled plate, the thickness of the hot-rolled plate is 5mm;

[0057] (4) Intermediate annealing: After cutting the hot-rolled sheet to length, heat it to 430°C in a circul...

Embodiment 3

[0065] A preparation method of 6181 aluminum alloy plate, comprising the following steps:

[0066] (1) Ingot preparation: 6181 aluminum alloy ingots were prepared by direct water-cooling semi-continuous casting, with a thickness of 120mm, and the ingredients and their mass percentages were: Si: 0.82%, Mg: 0.99%, Cu≤0.10%, Mn≤ 0.15%, Fe≤0.45%, Zn≤0.20%, Cr≤0.10%, Ti≤0.10%, impurity elements≤0.15%, the balance is Al;

[0067] (2) Heating: After the 6181 aluminum alloy ingot is cut and milled, it is heated to 480 ° C in a circulating air furnace and kept for 4 hours;

[0068] (3) Hot rolling: hot-rolling the 6181 aluminum alloy ingot after heat preservation, first rolling 5 passes along the width direction of the slab ingot, and then rolling 10 passes along the length direction of the slab ingot to obtain Hot-rolled plate, the thickness of the hot-rolled plate is 5mm;

[0069] (4) Intermediate annealing: After cutting the hot-rolled sheet to length, heat it to 440°C in a circul...

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Abstract

A method for preparing a 6181 aluminum alloy plate, including the following steps: preparing a 6181 aluminum alloy ingot; heating it to 420-480°C, hot-rolling it after insulation to obtain a hot-rolled plate; heating the hot-rolled plate to 420-440°C, After heat preservation, the furnace is cooled to room temperature and cold-rolled to obtain a cold-rolled plate; then it undergoes solution treatment, room temperature storage, pre-aging treatment, and room temperature storage again, which is the T4P state, and a 6181 aluminum alloy plate is obtained. This method reduces the conventional high-temperature homogenization treatment of ingots, shortens the process flow, saves energy, improves production efficiency, and significantly reduces costs; it can be implemented on existing aluminum alloy production lines without increasing investment in equipment and processes, and is simple and convenient to operate; The excess crystalline phase particles in the prepared 6181 aluminum alloy plate are small in size and dispersedly distributed, which is beneficial to improving the stamping performance of the 6181 aluminum plate, achieving cost reduction while fully meeting the performance requirements in stamping production.

Description

Technical field: [0001] The invention belongs to the technical field of aluminum alloys, and in particular relates to a preparation method of a 6181 aluminum alloy plate. Background technique: [0002] Since the car body accounts for about 30% of the weight of the whole vehicle, the use of aluminum alloy instead of steel plate to manufacture the body can reduce the weight of the body by more than 50%, which can significantly reduce the weight of the whole vehicle; under the same impact, the aluminum plate can absorb 50% more impact energy than the steel plate , increasing the safety of the occupants. In addition, the aluminum body basically does not rust during use and has a very high recovery rate. It is an ideal recyclable and environmentally friendly material. Therefore, the urgency and importance of aluminumizing the automobile body are self-evident. The 6181 aluminum alloy sheet that can be strengthened by heat treatment has become an ideal lightweight automobile body ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/02C22C21/08C22F1/043C22F1/047C22F1/05
CPCC22C21/02C22C21/08C22F1/043C22F1/047C22F1/05
Inventor 田妮许圆贾存发王光东张泽宇赵刚
Owner NORTHEASTERN UNIV LIAONING