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Aluminum alloy sheet material for vehicles and preparation method thereof

A technology for aluminum alloy plates and alloy plates, which is applied in the field of aluminum alloys, can solve the problems of increasing raw material costs and equipment investment costs, unreasonable production process design, and large production energy consumption, so as to achieve high production efficiency, reduce raw material costs, and improve production efficiency. The effect of recycling waste aluminum

Inactive Publication Date: 2015-09-09
SHANDONG NANSHAN ALUMINUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in order to further improve the formability of 5XXX series aluminum alloy sheets, most of them control the content of Fe and Si impurities at a low level (<0.1 wt%), and adopt advanced continuous annealing production lines and other methods, which greatly increase the cost of raw materials and equipment. cost of investment
At the same time, part of the production process design is unreasonable, such as homogenization adopts a system of 460-480 ° C / 16-24 hours, the production energy consumption is large, the cost is high, and the efficiency is low

Method used

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  • Aluminum alloy sheet material for vehicles and preparation method thereof
  • Aluminum alloy sheet material for vehicles and preparation method thereof
  • Aluminum alloy sheet material for vehicles and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0036] For reference example alloy ingot 4F171 and alloy ingot 1E298 of the present invention, cut the ingot sample at 1 / 4 of the thickness direction of the ingot after sawing and pinching the head and tail to carry out the laboratory exploration of the homogenization process, and use the air circulation furnace to carry out the uniform process heat treatment , the heating rate is 15-40 ℃ / h, water quenching after soaking and heat preservation. Using an optical microscope, under the same corrosion conditions, the soaked Al 6 (FeMn) dispersed phase for tissue observation. The soaking system of 4F171 ingot samples is 480°C / 2h and 480°C / 24h, and the metallographic photos are respectively figure 2 and image 3 . While the soaking system of 1E298 ingot samples is 480°C / 2h, 530°C / 2h, 530°C / 4h and 530°C / 8h, the Al 6 (FeMn) dispersed phase metallographic structure observation results are as follows Figure 4-7 shown.

Embodiment 2

[0038] Using the alloy ingot 1E298 of the present invention, after sawing and milling, use a pusher heating furnace to perform homogenization treatment. The treatment process is: differential temperature heating, ingot heating rate 15-40 ℃ / h, homogenization temperature 530 ℃, heat preservation 2 After 2 hours, the furnace is cooled to the hot rolling start temperature of 470-490 ℃, and the heat preservation is 2 hours for direct hot rolling. The 1+4 hot continuous rolling production line is used for hot rolling of the plate, and the hot rough rolling is carried out to the thickness of the middle plate. The thickness of the continuous finish rolling plate is 5.5 mm, and the coiling temperature of the plate is 339-350 ℃. After the hot-rolled coils were cooled to room temperature, they were cold-rolled and deformed to a thickness of 0.8 mm by a single-stand 6-high CVC cold-rolling mill. The air circulation furnace was used to explore the complete annealing process. The treatment ...

Embodiment 3

[0040] The alloy ingot 4F171 of the reference example was homogenized by a pusher heating furnace after sawing and milling. The treatment process was: differential temperature heating, the ingot heating rate was 15-40 ℃ / h, the homogenization temperature was 480 ℃, and the heat preservation was 2 h Afterwards, it is directly hot-rolled, and the 1+4 hot continuous rolling production line is used for hot-rolling of the plate. The thickness of the middle plate is 28 mm, and the thickness of the plate is 6.0 mm after 4 consecutive hot-rolled finishes. The coiling temperature of the plate is 337-349 ℃ . After the hot-rolled coils were cooled to room temperature, they were cold-rolled and deformed to a thickness of 0.8 mm by a single-stand 6-high CVC cold-rolling mill. A conventional horizontal annealing furnace is used for complete annealing, and the treatment process is as follows: the heating and cooling rate of the coil is 15-40 °C / h, the complete annealing temperature is 330 °C,...

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Abstract

The invention discloses an aluminum alloy sheet material for vehicles and a preparation method thereof. The aluminum alloy sheet material comprises 4.5-5.5wt% of Mg, 0.15-0.35wt% of Mn, 0.10-0.30wt% of Fe, less than or equal to 0.15wt% of Si, less than or equal to 0.10wt% of Ti, less than or equal to 0.10wt% of Cu, less than or equal to 0.10wt% of Zn, less than or equal to 0.10wt% of Cr and the balance Al and unavoidable impurities. The preparation method orderly comprises material blending, melting casting, uniformization, hot rolling deformation, primary cold rolling deformation, intermediate annealing, secondary cold rolling deformation and complete annealing. Through the design and optimization of alloy components and preparation processes, the 5XXX-series aluminum alloy sheet material with high formability and a low cost is prepared by the existing conventional plate and strip production line.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloys, and in particular relates to an aluminum alloy plate for vehicles and a preparation method thereof. Background technique [0002] With the continuous increase of global car ownership, energy consumption, environmental pollution and safety issues have become three severe issues facing the global auto industry, thus forcing auto companies to vigorously develop and promote vehicle lightweight technology. The core of automobile lightweight technology is to reduce the weight of automobiles to reduce energy consumption, improve fuel economy and reduce environmental pollution under the premise of controlling costs and ensuring performance. Therefore, with the acceleration of the lightweight process of automobiles in recent years, aluminum alloys are characterized by their light weight, high specific strength, corrosion resistance, good impact resistance, easy surface coloring, good processing fo...

Claims

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Application Information

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IPC IPC(8): C22C21/06C22C21/08C22F1/047
Inventor 曹零勇王宇孟凡林郭富安李俊鹏张华陶志民辛学祥王玉林
Owner SHANDONG NANSHAN ALUMINUM
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