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Production method of 5754-H24 aluminum alloy plate strip

A technology of aluminum alloy strip and production method, which is applied in the field of aluminum alloy manufacturing, can solve the problems of high production cost, many processes, narrow annealing temperature range, etc., reduce the requirements for temperature measurement accuracy and furnace temperature uniformity, and reduce process waste , the effect of reducing production costs

Active Publication Date: 2015-01-07
ALUHOUSE TECHGD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The performance of 5754 aluminum alloy is extremely sensitive to temperature changes when it is annealed between the recrystallization start temperature and the recrystallization end temperature. The temperature range is different, which has a great impact on large-scale industrial production, and requires high temperature uniformity in the annealing furnace. After annealing, the performance is often unqualified, resulting in low yield and high production costs.
The mechanical properties of the plate and strip produced by this process are stable, but there are many processes, the process is complicated, and the cost is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The short-process production method of 5754-H24 aluminum alloy plate and strip in this embodiment includes the following production process: melting and casting→sawing→face milling→heating→hot rolling→cold rolling→annealing of finished products→finishing→packaging.

[0025] (1) Melting and casting: the mass percentage of the chemical composition of the ingot after melting and casting is:

[0026] Al

[0027] The melting temperature is 730-740°C, the refining temperature is 720-730°C, and the casting temperature is 670-680°C.

[0028] (2) Heating: Heat the ingot to 500°C and keep it warm for 3 hours.

[0029] (3) Hot rolling: the thickness of the hot-rolled billet is 3.8mm (24% is reserved), and the finishing temperature of the hot-finish rolling is 335°C.

[0030] (4) Cold rolling: After one pass of cold rolling to 2.9mm, the total processing rate is 24%.

[0031] (5) Finished product annealing: temperature range 245-265 ℃, holding time 1-5 hours.

[0032] ...

Embodiment 2

[0035] The production method of the 5754-H24 aluminum alloy plate and strip in this embodiment includes the following production process: melting and casting→sawing→face milling→heating→hot rolling→cold rolling→finished product annealing→finishing.

[0036] (1) Melting and casting: the mass percentage of the chemical composition of the ingot after melting and casting is:

[0037] Al

[0038] The melting temperature is 730-745°C, the refining temperature is 725-740°C, and the casting temperature is 685-700°C.

[0039] (2) Heating: Heat the ingot to 500°C and keep it warm for 4 hours.

[0040] (3) Hot rolling: the thickness of the hot-rolled billet is 2.9mm (32% is reserved), and the finishing temperature of the hot-finish rolling is 332°C.

[0041] (4) Cold rolling: After one pass of cold rolling to 1.98mm, the total processing rate is 32%.

[0042] (5) Finished product annealing: temperature range 245-265 ℃, holding time 1-5 hours.

[0043] Annealing proc...

Embodiment 3

[0047] The short-process production method of 5754-H24 aluminum alloy plate and strip in this embodiment includes the following production process: melting and casting→sawing→face milling→heating→hot rolling→cold rolling→finished product annealing→finishing.

[0048] (1) Melting and casting: the mass percentage of the chemical composition of the ingot after melting and casting is:

[0049] Al

[0050] The melting temperature is 730-750°C, the refining temperature is 720-730°C, and the casting temperature is 675-685°C.

[0051] (2) Heating: heat the ingot to 495°C and keep it warm for 4 hours.

[0052] (3) Hot rolling: the thickness of the hot-rolled billet is 3.3mm (reserved 40%), and the finishing temperature of the hot-finish rolling is 335°C.

[0053] (4) Cold rolling: After one pass of cold rolling to 1.98mm, the total processing rate is 40%.

[0054] (5) Finished product annealing: temperature range 245-265 ℃, holding time 1-5 hours.

[0055] Anneali...

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PUM

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Abstract

The invention discloses a production method of a 5754-H24 aluminum alloy plate strip. The production method is characterized by mainly comprising the following steps of: fusion casting, saw cutting, plane milling, heating, hot rolling, cold rolling, finished-product annealing and finishing; in the hot rolling step, the hot-rolled coil thickness is reserved by 24-52 percent according to the finished-product thickness, and the finish rolling temperature during hot finish rolling is 320-350 DEG C; and in the cold rolling step, the finished-product thickness is achieved through one-pass or two-pass cold rolling, and the total working rate is 24-52 percent. According to the invention, with regard to the product with the finished-product thickness of being more than or equal to 1.0mm, the production flow can be shortened, the 5754-H24 annealing temperature interval is enlarged and the performance pass-rate after annealing is increased.

Description

technical field [0001] The invention relates to the field of aluminum alloy manufacturing, in particular to a production method of 5754-H24 aluminum alloy plate and strip. Background technique [0002] 5754 aluminum alloy is a typical alloy in the Al-Mg series alloy, which has the characteristics of medium strength, good corrosion resistance and weldability, and easy processing and forming. 5754 aluminum alloy sheets in different heat treatment states are widely used in welded structural parts, large roof panels, automobile manufacturing, rail transit, and shipbuilding industries, among which H24 state plate strip is one of the most used heat treatment states. With the improvement of performance requirements for aluminum alloy products, the dosage of 5754-H24 increases rapidly. [0003] At present, the conventional process flow of 5754-H24 is: melting and casting→homogenizing annealing→sawing→face milling→heating→hot rolling→cold rolling→finished product annealing→finishing...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/08C22F1/047
Inventor 张俊才黄文辉曲明洋王英武冷正长徐炳申李梅皮洪姚彩玲肖亮
Owner ALUHOUSE TECHGD CO LTD
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