Method of improving tank material finishing temperature

Abstract

The invention discloses a method of improving tank material finishing temperature. A five-rack tandem cold rolling mill is lubricated by water-based coolant. Volume percentage of oil phase of the water-based coolant is from 2% to 20%. Jet flow of the water-based coolant is 500 liters per minute to 1500 liters per minute. Reduction rate of a first rack is from 20% to 35%. The reduction rate of a second rack is from 20% to 35%. The reduction rate of a third rack is from 35% to 50%. The reduction rate of a fourth rack is from 35% to 50%. The reduction rate of a fifth rack is from 35% to 50%. The five-rack tandem cold rolling mill is lubricated by the water-based coolant, the finishing temperature of finished products reaches to at least 150 DEG C through controlling of content of the oil phase and jet flow of the water-based coolant and reduction rate allocation, the products can directly meet requirements of earing ratio and mechanical property without annealing operation, requirements of tank material are met, production efficiency is high and capacity is increased.

Description

technical field [0001] The invention relates to the field of aluminum alloy manufacturing, in particular to a method for increasing the finish rolling temperature of can body materials. Background technique [0002] The final rolling temperature of cold-rolled products is an important parameter such as the mechanical properties of the product. The cold-rolling finishing temperature of the domestic rolled aluminum can body needs to reach 150°C or above in order to meet the product lug rate and mechanical performance requirements, otherwise the finished product needs to be annealed to meet the customer's performance requirements. [0003] Most of the domestic aluminum processing industry adopts six-high / four-high single-stand cold rolling mills to roll multiple passes to achieve the target thickness of the tank material. During the rolling process, full oil lubrication is used, and the last pass uses high-speed Rolling, so that the final rolling temperature reaches the target...

AI Technical Summary

Problems solved by technology

However, although the full oil lubricating performance is good, the cooling performance is not good, and because of the high rate of strip breakage in high-speed rolling, it is easy to cause fire when the strip breaks, and the safety performance is not good, so the speed is limited by the lubrication method

If the speed reaches a large value, the finish rolling temperature cannot reach 150°C and above, and finally an annealing process for finished products is still required, which prolongs the process time, increases costs, and reduces production efficiency

[0004] Water-based coolants are gradually applied to high-speed, high-capacity tandem cold rolling mills. However, water-based coolants are mainly water-based, and water has the largest specific heat and the best cooling effect, which will directly affect the temperature of the strip. , which has a negative effect on the increase of finish rolling temperature

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