A kind of rolling method after heating based on pure nickel plate

Abstract

The invention discloses a rolling method based on pure nickel plate heating, which comprises a slab preheating section, a slab heating stage, a slab secondary heating section, a slab soaking section, slab rough rolling, and oxidation before finish rolling Skin treatment, plate finish rolling, curling, pickling and annealing; the invention heats up the slab at 150-220°C / min to prevent the rapid heating of the nickel plate slab from room temperature, causing changes in the internal crystals and resulting in a decrease in yield When the situation occurs, at the same time, during the heating process of the first stage heating, the second stage heating, and the soaking stage, the temperature control of the upper and lower burners can be controlled to make the temperature control more accurate. Clean the scale to prevent the scale from being pressed into the surface of the subsequent strip steel. At the same time, the nickel plate is rolled through 7 passes of down-pressing and 8 finishing mills during the rough rolling process to ensure that there is no roll on the surface of the rolled nickel plate. Printing, high flatness and good surface gloss.

Description

technical field [0001] The invention belongs to the technical field of hot rolling, in particular to a rolling method based on heating of a pure nickel plate. Background technique [0002] Because of its excellent corrosion resistance and high strength, pure nickel is widely used in aerospace, chemical industry, electric power, medical and other fields. The production methods of nickel mainly include electrolysis, carbonylation and hydrogen reduction; [0003] After searching the patent application publication number CN109351771A, a high-purity nickel plate rolling method comprises the following steps: step 1: hot rolling billet opening, step 2: finished product stable rolling, step 3: cutting the edge of the finished warm rolled nickel plate described in step 2 Plate machine trimmed; [0004] The method has the following deficiencies: 1) If the ambient temperature of the nickel plate is low, the nickel plate is directly hot-rolled and billeted. Because the temperature of t...

AI Technical Summary

Problems solved by technology

[0004] The method has the following deficiencies: 1) If the ambient temperature of the nickel plate is low, the nickel plate is directly hot-rolled and billeted. Because the temperature of the nickel plate rises sharply, it is very easy to change the crystals inside the nickel plate, which eventually leads to nickel plate The yield rate is greatly reduced, and at the same time, direct heating cannot be adjusted according to the actual situation in the existing heating technology; The oxide scale cannot be effectively and completely peeled off in the medium, but it will be rolled into the nickel plate, which will affect the surface quality

Images