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Method for effectively reducing surface fatigue striation defect of strip material and preparation method for 5-series aluminum alloy tank cover material

A strip surface, aluminum alloy technology, applied in the direction of workpiece surface treatment equipment, metal rolling, metal rolling, etc., can solve problems such as production interruption, affecting product quality and production progress stability, strip surface fatigue lines, etc.

Inactive Publication Date: 2018-09-28
SHANDONG NANSHAN ALUMINUM +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, hot continuous rolling has high requirements on product quality. If the process is not proper, fatigue grain defects will appear on the surface of the strip, resulting in fatigue grain batch quality accidents.
At this time, it is often necessary to stop the machine and change the roll to solve the problem, which leads to production interruption and seriously affects the stability of product quality and production progress.

Method used

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  • Method for effectively reducing surface fatigue striation defect of strip material and preparation method for 5-series aluminum alloy tank cover material

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Embodiment 1

[0030] The present embodiment provides a method for effectively reducing the fatigue grain defect on the surface of the strip, which includes:

[0031] The 5182 aluminum alloy is processed by 1+4 hot continuous rolling equipment, and the emulsion with the hot rolling oil concentration of 7vol% is used for lubrication during the processing.

[0032] Wherein, in parts by weight, the hot rolling oil includes: 50 parts of mineral oil, 10 parts of oiliness agent (castor oil and soybean oil), 15 parts of extreme pressure agent (n-butyl phosphite), and 2 parts of anti-emulsifier. The kinematic viscosity of mineral oil at 40°C is 200mm 2 / s.

[0033] When the rolling pass reaches 45-50 times, replace the work roll, and grind the work roll after each replacement, the grinding amount is 0.1-0.2mm / time, and the surface roughness of the work roll is 0.95-1.05 μm. The above emulsion at 60°C was used to preheat the work rolls for 40 minutes before rolling.

[0034] Through the above-men...

Embodiment 2

[0036] The present embodiment provides a method for effectively reducing the fatigue grain defect on the surface of the strip, which includes:

[0037] 1+4 hot continuous rolling equipment is used to process the 5083 aluminum alloy. During the process, the emulsion with the concentration of hot rolling oil of 10vol% is used for lubrication.

[0038] Wherein, by weight, the hot rolling oil includes: 90 parts of mineral oil, 15 parts of oily agent (peanut oil and oleic acid), 10 parts of extreme pressure agent (tricresyl phosphate), and 0.5 part of anti-emulsifier. The kinematic viscosity of mineral oil at 40°C is 50mm 2 / s.

[0039] When the rolling pass reaches 45-50 times, replace the work roll, and grind the work roll after each replacement, the grinding amount is 0.1-0.2mm / time, and the surface roughness of the work roll is 0.95-1.05 μm. The above emulsion at 60°C was used to preheat the work rolls for 60 minutes before rolling.

[0040] Through the above-mentioned treatm...

Embodiment 3

[0042] The present embodiment provides a method for effectively reducing the fatigue grain defect on the surface of the strip, which includes:

[0043] The 5A05 aluminum alloy is processed by 1+4 hot continuous rolling equipment, and the emulsion with the hot rolling oil concentration of 8vol% is used for lubrication during the processing.

[0044] Wherein, in parts by weight, the hot rolling oil includes: 70 parts of mineral oil, 25 parts of oiliness agent (castor oil and linoleic acid), 5 parts of extreme pressure agent (dialkyl dithiophosphate), and anti-emulsification 1 dose. The kinematic viscosity of mineral oil at 40°C is 100mm 2 / s.

[0045] When the rolling pass reaches 45-50 times, replace the work roll, and grind the work roll after each replacement, the grinding amount is 0.1-0.2mm / time, and the surface roughness of the work roll is 0.95-1.05 μm. The above-mentioned emulsion at 80°C was used to preheat the work rolls for 40 minutes before rolling.

[0046] Thr...

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Abstract

The invention discloses a method for effectively reducing a surface fatigue striation defect of a strip material, and relates to the field of aluminum alloy production. According to the method, in a hot continuous rolling process, an emulsion with the hot rolling oil concentration reaching up to 7-10 vol% is adopted to improve the lubricating effect, so that the friction force is reduced, the surface quality of a product is improved; moreover, a working roller is preheated for 40-60 minutes by adopting an emulsion with the temperature of 60-80 DEG C after a roller is replaced, so that the lubricating effect can be better achieved while full preheating is achieved, and the possibility of generation of fatigue striations is further reduced; and the quality and the stability of the aluminum alloy product can be effectively improved, the production cost is reduced, and the market competitiveness of the same kind of products is enhanced. The preparation method for a 5-series aluminum alloytank cover material comprises the above method for effectively reducing the surface fatigue striation defect of the strip material. According to the preparation method, the rolling throughput of the preparation method is high, the service cycle of a roller wheel is long, the production efficiency can be effectively improved, the production cost can be reduced, and moreover, the high-quality product can be obtained.

Description

technical field [0001] The invention relates to the field of aluminum alloy production, in particular to a method for effectively reducing fatigue grain defects on the surface of a strip and a preparation method for a 5-series aluminum alloy can lid material. Background technique [0002] Continuous hot rolling is a common processing method for preparing aluminum strips. In the prior art, continuous rolling equipment with one roughing mill and multiple finishing mills is usually used to realize hot continuous rolling of aluminum strips. For example, the hot rolling of aluminum strips in the United States generally uses 1+3 hot rolling equipment, that is, one roughing mill plus three finishing mills. However, some new manufacturers in China recently adopt 1+5 hot rolling equipment or 1+4 hot rolling equipment. The production of aluminum strips by the multi-stand hot rolling mill is characterized by high efficiency, large output, and the ability to make full use of heat energ...

Claims

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Application Information

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IPC IPC(8): B21B1/22B21B45/02
CPCB21B1/22B21B45/0251
Inventor 吕正风程仁策张昆李恒周树军麻在林宋致永刘玉华陈立志隋信栋王涛顾华锋杨立民曲大保朱国庆李志中隋信增李铸铁张启东
Owner SHANDONG NANSHAN ALUMINUM