Wide pure-nickel strip cold-rolling process

Abstract

The invention discloses a wide pure-nickel strip cold-rolling process. The wide pure-nickel strip cold-rolling process is characterized in that an annealed pure-nickel strip with a thickness of 4-6.0 mm is rolled by 5-10 passes to a target thickness of 0.8-2.5 mm by adopting a twenty-roll reversible type cold-rolling mill unit, wherein the rolling force is 3000-8000 KN; the deformation per pass is 8%-30%; the deformation at next pass is 75%-94% of the deformation at the last pass; the rolling speed is kept at 30-120m / min; and outlet tension is 1.1-1.5 times inlet tension. According to the wide pure-nickel strip cold-rolling process, in the rolling process, proportion of front and back tension and changes of rolling force are strictly controlled; the deformation per pass is controlled to 8%-30%; difference of rolling force between passes is within 800 KN; the strip shape and the thickness can be controlled very well; and the nickel strip which is 1300-1400 mm wide can still obtain good strip shape without strip breakage even the thickness of the nickel strip is reduced after multi-pass rolling.

Description

technical field [0001] The invention relates to the technical field of manufacturing industrial pure nickel strips, in particular to a method for producing pure nickel strips with a thickness of 0.8-2.5mm and a width of 1300-1400mm by using a 20-high cold rolling mill. Background technique [0002] At present, the existing nickel plate and strip rolling process is mainly four-roll mill sheet rolling or welding multiple pieces of nickel plate end to end and continuously rolling on the four-roll mill, and the final product is sheet. Can not meet the market demand for nickel strip. At the same time, the uniformity of sheet rolling is poor, the yield is low, and the shape and surface quality are difficult to control; sheet tailor-welded rolling is only rolled in the form of strips, and strips are prone to breakage during rolling. The requirements are high, and the tailor welding operation is difficult and the production efficiency is low. Tailor welded rolling is cut-to-length...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for producing a pure nickel strip with a thickness of 0.8 to 2.5mm and a width of 1300 to 1400mm by a 20-high cold rolling mill, so as to solve the problem that the prior art cannot continuously roll this kind of wide and thin nickel strip technical issues

Images