Method for Eliminating Oil Spots on Thin Nickel Strips

Abstract

The invention provides a method for eliminating oil spots on a thin nickel strip, which includes the following process steps: step S1, preparation of a thin nickel strip: cold rolling the raw nickel hot-rolled plate through multiple passes to the thickness required by the finished product; step S2, bright annealing : Put the cold-rolled sheet into the bright annealing furnace for offline annealing treatment between passes, the annealing temperature is 600-680°C, and the holding time is 15-30 minutes; the front and back of the continuous bright annealing furnace are closed, and the high-temperature inner tank is filled with Hydrogen protective atmosphere, hydrogen as a protective gas enters from the outlet end and is discharged from the inlet end to control the flow of the protective gas; the bright annealing furnace is equipped with a jet duct and a powerful circulation system to etch the heated atmosphere to the surface of the nickel strip to achieve Rapid and uniform strong convection heating; step S3, degreasing and cleaning: degreasing and cleaning the cold-rolled thin nickel strip to obtain a finished thin nickel strip. The invention can improve product quality, shorten production cycle and reduce cost.

Description

Technical field [0001] The present invention belongs to the field of nickel processing technology, relates to a method of eliminating thin nickel strip oil spots. Background [0002] Pure nickel N6 has excellent electromagnetic control performance, has been widely used in microelectronics, machinery and other fields, is an indispensable part of today's information society. Pure nickel needs to add lubricating oil during the rolling process, on the one hand, to avoid damaging the surface of the nickel strip, on the other hand, it can also reduce the rolling force. However, this also inevitably brings surface quality problems, and incomplete combustion of lubricating oil during the annealing process can easily lead to yellow oil spots on the surface of the nickel strip. [0003] At present, the domestic method of eliminating the occurrence of oil spots is generally to add new cleaning equipment, patent CN210411628U discloses a nickel belt production cleaning device, nickel belt fro...

AI Technical Summary

Problems solved by technology

But this also inevitably brings surface quality problems, the incomplete combustion of lubricating oil in the annealing process will easily lead to yellow oil spots on the surface of the nickel strip

[0003] The current domestic method for eliminating oil spots is generally to add new cleaning equipment. Patent CN210411628U discloses a nickel strip production and cleaning device. During this time, push down the cylinder, so that the upper and lower wiping cottons are in contact with the nickel belt, so as to wipe the nickel belt, and then the nickel belt is blown through the upper and lower soot blowing pipes, and the soot blowing pipe is connected to the soot blowing pipe through the high-pressure blower. The pipe runs through the blowing pipe to blow soot on the upper and lower surfaces of the nickel strip, and the blown dust and debris are extracted through the soot extraction hood to ensure the cleanliness of the workshop, but the new equipment will inevitably increase the production cost

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