Casting rolling roller surface treatment method of aluminum casting rolling machine

A technology for surface treatment and casting rolls, which is applied in the field of surface treatment of casting rolls for aluminum casting and rolling mills. It can solve problems such as potential safety hazards, unstable lubrication, and uneven lubrication of the roll surface, so as to prolong the service life, improve surface quality, and eliminate stress. enrichment effect

Active Publication Date: 2010-10-20
YUNNAN ALUMINUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to insufficient dissolution of graphite milk in water, graphite will condense into particles with impurities in water. First, the spraying device will be blocked, resulting in uneven lubrication of the roll surface; second, graphite particles will easily form on the surface of the cast-rolled slab, affecting product quality.
At the same time, it affects the cooling and lubricating effect of the casting roll, and fatigue cracks are easily generated locally, reducing the service life of the casting roll sleeve
In recent years, carbon black that has not been fully burned by liquefied petroleum gas has been used to lubricate the roller surface. The continuous use of liquefied petroleum gas in a high-temperature environment has potential safety hazards.

Method used

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  • Casting rolling roller surface treatment method of aluminum casting rolling machine
  • Casting rolling roller surface treatment method of aluminum casting rolling machine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] (1) After the casting roll is ground, clean it with gasoline to remove the oil on the surface, dip a towel into a solution prepared by methanol and nitric acid (methanol: nitric acid is 5-20:1 by volume), wring out the towel and wipe the roll surface once, then water Clean the surface; the surface of the roller sleeve forms Fe with a uniform thickness of 0.05-0.1mm 2 o 3 Iron oxide coating, Brinell hardness (HB) ≥ 410N / mm 2 ;

[0016] (2) Spray a layer of graphite lubricant on the surface of the casting roll. As the graphite milk cannot be fully dissolved in water, first use alcohol and graphite milk to fully stir and mix for about 2 minutes (using alcohol as a solvent, first fully dissolve the graphite milk in alcohol. ), then add water and stir for about 2 minutes to dilute, and be mixed with graphite lubricant of required concentration; graphite milk: alcohol: water=1: 0.5: 20 (volume ratio);

[0017] (3) Circulating heating of the casting roll with hot water at a...

Embodiment 2

[0020] The difference from Example 1 is: graphite milk in the graphite lubricant: alcohol: water=1:1:40 (volume ratio). All the other methods are the same as in Example 1.

Embodiment 3

[0022] The difference from Example 1 is: graphite milk in the graphite lubricant: alcohol: water=1:2:60 (volume ratio). All the other methods are the same as in Example 1.

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Abstract

The invention relates to a casting rolling roller surface treatment method of an aluminum casting rolling machine, which comprises the following steps: 1) cleaning the surface of a casting rolling roller by a solution prepared from methanol and nitric acid according to a volume ratio of 5 to 20 / 1, and forming an Fe2O3 ferric oxide covering layer with the uniform thickness between 0.05 and 0.1 mm on the surface of the roller; 2) using alcohol for dissolving colloidal graphite, then, adding water to prepare graphite lubrication liquid according to a volume ratio of colloidal graphite / alcohol / water=1 / 0.5 to 2 / 20 to 60, and spraying the graphite lubrication liquid onto the surface of the casting rolling roller; and 3) heating circulated water by steam so that the water temperature can reach 30 to 70 DEG C, introducing the water into the inside of the casting rolling roller to cyclically heat the casting rolling roller, and then, drying the surface of the roller. The casting rolling roller surface treatment method of the aluminum casting rolling machine of the invention improves the surface hardness of the casting rolling roller, improves the friction characteristics, improves the lubrication effect, eliminates the stress enrichment of the roller in the plate standing process, slows down the generation trend of cracks on the surface of a roller sleeve, and prolongs the service life of the roller sleeve of the roller.

Description

technical field [0001] The invention relates to the technical field of aluminum processing, in particular to a surface treatment method for casting rolls of an aluminum casting rolling mill. Background technique [0002] Casting rolls of aluminum casting and rolling mills are important consumable spare parts for aluminum casting and rolling production. The molten aluminum at about 700°C is transported through the casting nozzle to the casting rolling area formed by a pair of steel casting rolls with circulating cooling water passing through them in opposite directions of rotation. After the molten aluminum enters the casting and rolling area, it is immediately cooled. With the rotation of the casting rolls, the process of crystallization, solidification, and rolling is completed to obtain a cast-rolling slab. The casting rolls continue to rotate, and the aluminum liquid is continuously transported, and the cast-rolled slab can be obtained continuously. Rolled slab. The cas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/76C23C22/78C23C22/82
Inventor 胥福顺金国强和锦黎何正夫付利智陈劲戈刘萍詹丽萍栾争位何方王维军华继刚杜吉灿
Owner YUNNAN ALUMINUM
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