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A kind of 5 series aluminum alloy plate and its preparation method and application

An aluminum alloy plate and aluminum alloy plate technology, applied in the field of aluminum alloy materials, can solve the problems of shortening cooling time, no special requirements for cooling speed, unsatisfactory cooling effect, etc., and achieve the effect of good plasticity and high strength

Active Publication Date: 2020-06-02
CRRC QINGDAO SIFANG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

One of the reasons is that the cooling effect is not ideal
The existing 5-series aluminum alloy plates usually use natural air cooling after hot rolling, although some plates will also use forced air cooling, but there is no special requirement for cooling speed, just shortening the cooling time

Method used

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  • A kind of 5 series aluminum alloy plate and its preparation method and application
  • A kind of 5 series aluminum alloy plate and its preparation method and application
  • A kind of 5 series aluminum alloy plate and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] This embodiment provides a method for preparing a 5-series aluminum alloy, including:

[0025] (1) A 400mm thick flat ingot of 5083 aluminum alloy was obtained by melting and casting. The composition is shown in Table 1. It was uniformly annealed at 500°C for 48 hours, and the surfaces of the ingot were milled flat.

[0026] (2) Heat the cast ingot to 420° C. and then hot-roll it to a thickness of 4 mm.

[0027] (3) Use a blower to cool the 5083 plate at the exit of the hot rolling at a cooling rate of 15°C / s, and the plate after cooling to 200°C is curled into a material.

[0028] (4) The tensile test of the obtained 5083 plate is carried out according to GB / T228.1-2010, and the measured tensile properties are shown in Table 2.

Embodiment 2

[0030] This embodiment provides a method for preparing a 5-series aluminum alloy, including:

[0031] (1) A 400mm thick flat ingot of 5083 aluminum alloy was obtained by melting and casting. The composition is shown in Table 1. It was uniformly annealed at 500°C for 48 hours, and the surfaces of the ingot were milled flat.

[0032] (2) Heat the cast ingot to 420° C. and then hot-roll it to a thickness of 4 mm.

[0033] (3) Use a blower to cool the 5083 plate at the exit of the hot rolling. The measured cooling rate of the plate is 20°C / s, and the plate is curled into a material after cooling to 190°C.

[0034] (4) The tensile test of the obtained 5083 plate is carried out according to GB / T228.1-2010, and the measured tensile properties are shown in Table 2.

Embodiment 3

[0036] This embodiment provides a method for preparing a 5-series aluminum alloy, including:

[0037] (1) A 400mm thick flat ingot of 5083 aluminum alloy was obtained by melting and casting. The composition is shown in Table 1. It was uniformly annealed at 500°C for 48 hours, and the surfaces of the ingot were milled flat.

[0038] (2) Heat the cast ingot to 420°C and hot-roll it to a thickness of 16mm.

[0039] (3) Use a blower to cool the 5083 plate at the exit of the hot rolling. The measured cooling rate of the plate is 25°C / s, and the plate is curled into a material after cooling to 200°C.

[0040] (4) The tensile test of the obtained 5083 plate is carried out according to GB / T228.1-2010, and the measured tensile properties are shown in Table 2.

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Abstract

The invention relates to a 5-series aluminum alloy panel, as well as a preparation method and application thereof. The preparation method of the 5-series aluminum alloy panel is characterized by forced cooling a hot-rolled aluminum alloy panel to be below 200 DEG C at the cooling speed being 15 to 25 DEG C / s. By adopting the cooling method provided by the invention, a fine-grain panel with the grain size being smaller than 30mum can be prepared, so that the strength and the extensibility of the 5XXX-series, particularly 5083 aluminum alloy panel material are improved.

Description

technical field [0001] The invention relates to a 5-series aluminum alloy plate and its preparation method and application, belonging to the technical field of aluminum alloy materials. Background technique [0002] 5083 aluminum alloy is a common Al-Mg series (5XXX series) aluminum alloy in production and life. be more widely applied. In addition, 5083 also has good corrosion resistance and good formability, and is the material of choice for railway passenger and freight trains, high-speed trains, maglev trains, double-decker passenger cars, subway trains, etc. to achieve lightweight goals. [0003] Although the existing 5083 aluminum alloy has good performance, its strength and plasticity are still insufficient in practical applications, especially when it is used as a train. One of the reasons is that the cooling effect is not ideal. The existing 5-series aluminum alloy plates are usually naturally air-cooled after hot rolling. Although some plates are also forced air-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/08C22F1/047B21B45/02
CPCB21B45/0209B21B2045/0212C22C21/08C22F1/047
Inventor 林化强孙琳田爱琴丁叁叁
Owner CRRC QINGDAO SIFANG CO LTD
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