A method for improving flanging performance of aluminum alloy sheet

A technology for aluminum alloy sheets and aluminum alloy ingots, which is applied in the manufacture of aluminum alloy sheets and improves the flanging performance of 6000 series aluminum alloy sheets, can solve the problems of unqualified flanging performance, and achieve the effect of improving flanging performance.

Active Publication Date: 2022-04-05
GRIMAT ENG INST CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the unqualified flanging performance of 6000 series aluminum alloy plates, especially the precipitation of coarse Mg during the cooling process after homogenization 2 Si phase leads to the problem that the flanging performance is unqualified. The purpose of the present invention is to provide a method for improving the flanging performance of aluminum alloy plates, so that after the 6000 series aluminum alloy plates are subjected to on-line solution treatment and pre-aging treatment, the plates are turned over in T4P state. The edge performance has been significantly improved, meeting the requirements of automobile factories for the flanging performance of 6000 series aluminum alloy sheets

Method used

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  • A method for improving flanging performance of aluminum alloy sheet
  • A method for improving flanging performance of aluminum alloy sheet
  • A method for improving flanging performance of aluminum alloy sheet

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Embodiment 1

[0024] The present invention is applied to a 6000 series aluminum alloy, and its nominal composition range (mass fraction, %): Mg: 0.7-1.3, Si: 0.6-1.2, Cu: 0.02-0.20, Mn: 0.01-0.25, Fe≤0.40, Zn: 0.25~0.80, Cr≤0.10, Ti≤0.15, Zr: 0.01~0.20, the balance of Al and other unavoidable impurities; choose a typical alloy composition: Mg: 0.80, Si: 1.0, Zn: 0.55 , Cu: 0.18, Mn: 0.10, Fe: 0.15, Cr: 0.010, Zr: 0.080, Ti: 0.02, the balance Al and other unavoidable other impurities. The alloy was melted and casted to obtain an ingot with a width of 2200mm and a thickness of 620mm. After the ingot was homogenized at 550°C / 20h, it was cooled with the furnace in a heat treatment furnace at a cooling rate of 10°C / h. After the ingot was completely cooled, it was Transfer to the heating furnace for heating and heat treatment before hot rolling. The heating rate is 50°C / h, the holding temperature is 530°C, and the holding time is 4h. Then it is directly subjected to hot rolling, intermediate anne...

Embodiment 2

[0026] The 6000-series aluminum alloy with the same composition as in Example 1 was used. The alloy was melted and cast to obtain an ingot with a width of 1800 mm and a thickness of 420 mm. The ingot was homogenized at 550°C / 20h and then air-cooled. The cooling rate was 30°C / h. After the ingot is completely cooled, it is transferred to the heating furnace for heat treatment before hot rolling. The heating rate is 100°C / h, the holding temperature is 550°C, and the holding time is 2h. Then it is directly hot-rolled, intermediate annealed and Cold-rolled deformation to obtain cold-rolled plate and strip, and then the plate and strip are subjected to solution treatment at 555°C / 1min in the air cushion furnace, and pre-aging treatment is performed within 30min to obtain T4P state alloy plate and strip. The flanging performance of the T4P state alloy plate and strip is tested according to the standard of GB T 33227-2016 "Aluminum and Aluminum Alloy Plates and Strips for Automobiles",...

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Abstract

The invention discloses a method for improving the flanging performance of an aluminum alloy plate. The method comprises the following steps: (1) performing homogenization heat treatment on an aluminum alloy ingot, and performing air cooling and / or furnace cooling on the billet after the homogenization treatment; (2) performing heat treatment on the billet before hot rolling: the holding temperature is 520℃~560℃, the heating rate is 40℃ / h~120℃ / h, and the holding time is 1.5h~5h; (3) Then hot-roll and / or cold-roll the heated billet to obtain cold-rolled coil ; (4) On-line solution treatment and pre-aging treatment of the coil to obtain the strip in the T4P state. The present invention regulates the Mg in the structure through the reasonable matching of the uniform cooling process and the heating process before hot rolling. 2 The morphology, quantity and size of the Si phase improve the flanging performance of the T4P state plate, and the flanging performance of the alloy plate prepared by this method meets the requirements of the automobile factory.

Description

technical field [0001] The invention relates to a method for manufacturing an aluminum alloy plate, in particular to a method for improving the flanging performance of a 6000 series (Al-Mg-Si series) aluminum alloy plate, and belongs to the technical field of aluminum alloy material preparation and processing. Background technique [0002] For the automobile manufacturing industry, reducing automobile fuel consumption and saving energy is the eternal development theme of the global automobile industry. Relevant data show that for every 100kg reduction in vehicle weight of traditional fuel vehicles, fuel consumption can be reduced by 0.3-0.6L / 100km, CO 2 Emissions can be reduced by 5g / km. In recent years, with the continuous improvement of my country's requirements for atmospheric environmental protection and energy security, the government has attached great importance to the exhaust emissions and fuel consumption of traditional fuel vehicles, and has successively issued a ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22F1/05
CPCC22F1/05
Inventor 闫丽珍张永安熊柏青李志辉李锡武刘红伟黄树晖闫宏伟温凯
Owner GRIMAT ENG INST CO LTD
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