Marine-environment-resistant 5083 aluminum alloy plate strip and production method thereof

A technology for aluminum alloy plates and strips and marine environment, applied in the field of aluminum alloy manufacturing, can solve the problems of insufficient corrosion resistance of aluminum alloy plates and strips, failing to reach the level of exfoliation corrosion, long production cycle, etc., so as to avoid excessive plasticity drop. , to avoid the effect of anti-exfoliation corrosion resistance and reduce production costs

Active Publication Date: 2021-07-20
GUANGXI LIUZHOU YINHAI ALUMINUM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These processes have many procedures, long production cycle and high cost, and the corrosion resistance of aluminum alloy plates and strips produced by some processes is insufficient, and the 5-series aluminum alloy plates used in marine environments cannot be peeled off after testing according to the ASTM G66 standard. The corrosion level does not exceed PB level, and the weight loss after ASTM G67 intergranular corrosion test is ≤15mg / cm2

Method used

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  • Marine-environment-resistant 5083 aluminum alloy plate strip and production method thereof
  • Marine-environment-resistant 5083 aluminum alloy plate strip and production method thereof
  • Marine-environment-resistant 5083 aluminum alloy plate strip and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] In this embodiment, a production method of high-strength spalling-resistant and intergranular corrosion-resistant 5083 aluminum alloy plate and strip includes the following production process: melting and casting→sawing→milling→heating→hot rolling→cold rolling→finishing.

[0024] (1) Melting and casting: the mass percentage of chemical elements in the ingot after melting and casting is

[0025]

[0026] The melting temperature is 745-760°C, the refining temperature is 730-740°C, and the casting temperature is 680-690°C.

[0027] (2) Heating: Heat the ingot to 540°C and keep it warm for 2 hours.

[0028] (3) Hot rolling: the finishing temperature of the hot rough rolling is 450°C, the finishing rolling temperature of the hot finish rolling is 320°C, and the thickness of the hot rolled billet is 2.0mm.

[0029] (4) Cold rolling: After one pass of cold rolling, the hot-rolled billet is rolled to 1.85mm, and the total processing rate is 7%.

[0030] (5) Finishing: clea...

Embodiment 2

[0032] In this embodiment, a production method of high-strength spalling-resistant and intergranular corrosion-resistant cold-rolled 5083 aluminum alloy plate and strip includes the following production process: melting and casting→sawing→face milling→heating→hot rolling→cold rolling→finishing.

[0033] (1) Melting and casting: the mass percentage of chemical elements in the ingot after melting and casting is

[0034]

[0035] The melting temperature is 730-740°C, the refining temperature is 720-730°C, and the casting temperature is 690-700°C.

[0036] (2) Heating: heat the ingot to 520°C and keep it warm for 6 hours.

[0037](3) Hot rolling: the finishing temperature of the hot rough rolling is 420°C, the finishing rolling temperature of the hot finish rolling is 350°C, and the thickness of the hot rolled billet is 5.55mm.

[0038] (4) Cold rolling: After one pass of cold rolling, the hot-rolled billet is rolled to 5.0 mm, and the total processing rate is 9.9%.

[0039] ...

Embodiment 3

[0041] In this embodiment, a production method of high-strength spalling-resistant and intergranular corrosion-resistant cold-rolled 5083 aluminum alloy plate and strip includes the following production process: melting and casting→sawing→face milling→heating→hot rolling→cold rolling→finishing.

[0042] (1) Melting and casting: the mass percentage of chemical elements in the ingot after melting and casting is

[0043]

[0044] The melting temperature is 740-755°C, the refining temperature is 725-735°C, and the casting temperature is 685-695°C.

[0045] (2) Heating: heat the ingot to 500°C and keep it warm for 12 hours.

[0046] (3) Hot rolling: the finishing temperature of the hot rough rolling is 390°C, the finishing rolling temperature of the hot finish rolling is 335°C, and the thickness of the hot rolled billet is 7.95mm.

[0047] (4) Cold rolling: After one pass of cold rolling, the hot-rolled billet is rolled to 7.0 mm, and the total processing rate is 11.9%.

[004...

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Abstract

The invention discloses a marine-environment-resistant 5083 aluminum alloy plate strip and a production method thereof, and relates to the technical field of aluminum alloy manufacturing. The production method of the strip comprises the following steps of casting, saw cutting, surface milling, heating, hot rolling, cold rolling and finishing. In the heating step, the heating temperature for a cast ingot is 500-540 DEG C, and the heat preservation time is 2-12 hours. In the hot rolling step, the finish rolling temperature of hot rough rolling is controlled to be 390-450 DEG C, the finish rolling temperature of hot finish rolling is 320-350 DEG C, and after a hot-rolled coil is off-line, the hot-rolled coil is naturally cooled for 2-4 hours and then air-cooled. The total working rate in the cold rolling step is 7-12%. The plate strip produced by the invention has high strength and excellent stripping resistance and intergranular corrosion resistance, and is suitable for severe marine environments.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy manufacturing, in particular to a 5083 aluminum alloy plate and strip suitable for marine environments and a production method thereof. Background technique [0002] 5083 aluminum alloy has the characteristics of high strength, good corrosion resistance, weldability and easy processing and forming. It is a typical alloy in the Al-Mg series alloy and is widely used in automobile manufacturing, various gas and liquid storage tanks, ships, Marine engineering, armored vehicles and other fields. In recent years, with the higher and higher requirements for energy saving and emission reduction and ship speed, the demand for high-strength 5083 aluminum alloy for structural parts of ships and marine engineering is increasing. Exfoliation and intergranular corrosion are prone to occur in marine environments, leading to possible failure of materials in service. Therefore, the 5083 aluminum alloy pla...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/08C22C1/02C22F1/047
CPCC22C21/08C22C1/026C22F1/047
Inventor 黄前斌黄文辉叶书铣马英义陈纪强吴镇宇庞凤覃燕玲
Owner GUANGXI LIUZHOU YINHAI ALUMINUM IND
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