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A kind of production method of al-zn-mg-cu series aluminum alloy sheet material for inner toe cap of safety shoes

A technology of aluminum alloy plate and production method, which is applied in the field of aluminum alloy, can solve problems such as unstable electrical conductivity, low electrical conductivity, and poor surface quality of the plate, and achieve the effects of excellent mechanical properties, stable mechanical properties, and good surface quality

Active Publication Date: 2020-07-28
广西南南铝加工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to previous production experience, the surface conductivity of the Al-Zn-Mg-Cu O-state sheet for punching is required to be ≥ 45% IACS. Low, low electrical conductivity and subsequent stamping cracks, etc., cannot meet the subsequent stamping requirements of the inner toe cap of the labor insurance toe cap
[0005] Technical shortcomings of existing rolling and annealing processes: the small-pass rolling and single-stage annealing processes used in industrial production cannot stably control the degree of recrystallization and precipitated phases during the annealing process of Al-Zn-Mg-Cu alloys. The shape, size and distribution of the products are often prone to low elongation and unstable conductivity values, the subsequent stamping performance of the plate is poor, and the product yield is low
In addition, cleaning oil is generally used in the cleaning process of heavy coils in the prior art. After cleaning, the volatilization is not thorough and remains on the surface of the coil. After annealing, the oil spots on the coil are sintered to form obvious butter spots, and the surface quality of the board is poor.

Method used

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  • A kind of production method of al-zn-mg-cu series aluminum alloy sheet material for inner toe cap of safety shoes
  • A kind of production method of al-zn-mg-cu series aluminum alloy sheet material for inner toe cap of safety shoes
  • A kind of production method of al-zn-mg-cu series aluminum alloy sheet material for inner toe cap of safety shoes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Melting and casting aluminum alloy slabs with the following components, the chemical components in the aluminum alloy slabs are: Si0.07, Fe 0.13, Cu 1.2, Mn 0.05, Mg 2.3, Cr 0.18, Zn 5.4, Ti 0.02, Yu The amount is composed of Al and unavoidable impurities; after the aluminum alloy melt is degassed and refined, it is cast into a 490×1600mm aluminum alloy flat ingot by the hot top semi-continuous casting method;

[0030] Preheating: Place the cast ingot in a pit furnace, heat it to 380°C, keep it warm for 1 hour, and then release it from the furnace.

[0031] Hot rolling: hot rough rolling of the preheated ingot to a 15mm thickness plate, transfer to hot finish rolling, rolling to a 4mm coil, trimming to 50mm.

[0032] Cold rolling: After 2 passes, the reduction in a single pass is 40-45%, and the coil is rolled to a thickness of 1.4mm.

[0033] Heavy coil cleaning: Use 50°C high-pressure water to clean the residual rolling oil in the cold-rolled coil, and use a high-pre...

Embodiment 2

[0040] Melting and casting aluminum alloy slabs with the following components, the chemical components in the aluminum alloy slabs are: Si0.05, Fe 0.11, Cu 1.5, Mn 0.03, Mg 2.5, Cr 0.25, Zn 5.8, Ti 0.1, Yu The amount is composed of Al and unavoidable impurities; after the aluminum alloy melt is degassed and refined, it is cast into a 490×1600mm aluminum alloy flat ingot by the hot top semi-continuous casting method;

[0041] Preheating: Place the cast ingot in a pit furnace, heat it to 450°C, keep it warm for 8 hours, and then release it from the furnace.

[0042] Hot rolling: Hot rough rolling of the preheated ingot to 20mm thick plate, transfer to hot finish rolling, rolling to 7mm coil, trimming to 90mm.

[0043] Cold rolling: After 2 passes, the reduction in a single pass is 40-45%, and the coil is rolled to a thickness of 2.5mm.

[0044] Heavy coil cleaning: Use 60°C high-pressure water to clean the residual rolling oil in the cold-rolled coil, and use a high-pressure pu...

Embodiment 3

[0051] Melting and casting aluminum alloy slabs with the following components, the chemical components in the aluminum alloy slabs are: Si0.03, Fe 0.09, Cu 2.0, Mn 0.02, Mg 2.8, Cr 0.28, Zn 6.1, Ti 0.2 balance It is composed of Al and unavoidable impurities; after the aluminum alloy melt is degassed and refined, it is cast into a 490×1600mm aluminum alloy flat ingot by a hot-top semi-continuous casting method;

[0052]Preheating: Place the cast ingot in a pit furnace, heat it to 480°C, keep it warm for 12 hours, and then release it from the furnace.

[0053] Hot rolling: hot rough rolling of the preheated ingot to 25mm thick plate, transfer to hot finish rolling, rolling to 9mm coil, trimming to 120mm.

[0054] Cold rolling: after 1 pass, the single-pass reduction is 45%, and the coil is rolled to a thickness of 5.0mm.

[0055] Heavy coil cleaning: Use 80°C high-pressure water to clean the residual rolling oil in the cold-rolled coil, and use a high-pressure purge device to p...

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Abstract

The invention relates to the technical field of aluminum alloys, in particular to a production method for an Al-Zn-Mg-Cu series aluminum alloy panel for safety shoe box toes. According to the production method for the Al-Zn-Mg-Cu series aluminum alloy panel for the safety shoe box toes, chemical components including Si, Fe, Cu, Mn, Mg, Cr, Zn, Ti and the balance Al are adopted for casting an aluminum alloy casting ingot, the aluminum alloy casting ingot is subjected to the steps of preheating, hot rolling, cold rolling, cleaning and three-level annealing, and the aluminum alloy panel is manufactured. The obtained product has excellent and stable mechanical performance and meanwhile has high punching performance, high electric conductivity and good surface quality, and the punching using requirement for safety shoe toepiece materials can be met.

Description

technical field [0001] The invention relates to the technical field of aluminum alloys, in particular to a production method of an Al-Zn-Mg-Cu series aluminum alloy plate for inner toe caps of safety shoes. Background technique [0002] Safety shoes, also called labor insurance shoes, are shoes that have a safety protection effect on the feet. There are many types depending on the site used. The main function is to prevent objects from hurting the instep and toes, and its protective function is mainly realized by the inner toe cap made of metal. Generally, steel-toed labor insurance shoes can withstand 2 tons of pressure, which is safe and reliable, but steel labor insurance shoes are bulky and inconvenient to wear. With people's increasingly high and light demand for labor insurance shoes, the aluminum alloy inner toe cap with light density and high strength has received more and more attention. [0003] Al-Zn-Mg-Cu aluminum alloy has high strength, hardness, low density...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/10C22F1/053
CPCC22C21/10C22F1/053
Inventor 黄淑萍何克准韦修勋张江斌马英义陈秋林庞博文王华春覃珊
Owner 广西南南铝加工有限公司
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