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Al-Mg alloy sheet and rolling method for reducing earing rate of Al-Mg alloy sheet

A thin plate and alloy technology, applied in metal rolling, manufacturing tools, temperature control, etc., can solve problems such as unavailable processing methods, achieve the effect of inhibiting nucleation and growth, strong applicability, and good universality

Active Publication Date: 2022-07-05
CHINALCO MATERIALS APPL RES INST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] How to reduce the ear-making rate of Al-Mg alloy materials with higher purity is a technical problem, but there is currently no processing method for this type of product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Example 1: 5150-H12 rolling production

[0022] (1) Casting and chemical composition control: DC semi-continuous casting is used to cast a 5150 alloy ingot with a thickness of 560mm. control. After the ingot is milled, the thickness becomes 520mm, and then it enters the hot rolling process.

[0023] (2) Hot rolling: After the ingot is kept at 530℃ for 12h, hot rolling is started, and 22 passes are rolled into a 12mm hot rolled coil. The total hot rolling reduction rate is 97.7%, and the rolling temperature is 450~500℃. Control the hot finish rolling temperature to 260-270℃.

[0024] (3) Cooling of the hot-rolled coil: After the hot-rolled coil is wound, it is naturally cooled to room temperature (20~25℃).

[0025] (4) One-time cold rolling: After the hot-rolled coil is cooled to room temperature, it undergoes 6 passes of cold-rolling to obtain a cold-rolled coil with a thickness of 0.8 mm, and the total cold rolling reduction rate is 93.3%.

[0026] (5) Intermediate...

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Abstract

The invention provides an Al-Mg alloy sheet and a rolling method for reducing the earing rate of the Al-Mg alloy sheet, and the rolling method comprises the following steps: sequentially carrying out hot rolling and primary cold rolling treatment on an Al-Mg alloy ingot to obtain the Al-Mg alloy sheet; wherein the total reduction rate of hot rolling is controlled to be larger than or equal to 95%, the hot finish rolling temperature of hot rolling is 220-300 DEG C, and the total reduction rate of primary cold rolling is larger than or equal to 90%. When the method is adopted for rolling, the problem that the high-purity Al-Mg alloy sheet is high in earing rate can be effectively solved, and on the premise that the low earing rate of a product is kept, the product can have better surface performance, deep drawing performance and strength at the same time. Moreover, the method has high applicability to production equipment, conventional production equipment can be adopted as equipment for hot rolling, cold rolling, annealing and other working procedures involved in the process, equipment investment does not need to be increased, the cost is lower, and the universality is better.

Description

technical field [0001] The invention relates to the field of aluminum alloy sheets, in particular, to an Al-Mg alloy sheet and a rolling method for reducing the ear ratio of the Al-Mg alloy sheet. Background technique [0002] In packaging, lighting, construction, automobile, battery and other industries, in order to ensure the high surface quality, high reflectivity and high smoothness of products, and to reduce the reduction of surface quality caused by the alloy compound phase during the anodizing process, the aluminum alloy is selected. The purity of the alloy material is generally higher and the impurity content is lower. At the same time, a large part of the parts required in these industries are cylindrical deep-drawing parts, which need to be formed and manufactured through multiple passes of deep-drawing processes, so the materials are also required to have excellent deep-drawing properties. Moreover, under actual use conditions, the material is also required to ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B3/00B21B37/56B21B37/74C21D9/46C22F1/047
CPCB21B3/00B21B37/74B21B37/56C22F1/047C21D9/46B21B2003/001
Inventor 吴永福余康才赖爱玲李清马科赵丕植任毅斌李琳玉
Owner CHINALCO MATERIALS APPL RES INST CO LTD
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