Method for preparing ultra-high-purity nickel strip by short process

Abstract

The invention discloses a method for preparing an ultra-high-purity nickel strip by a short process. The method comprises the steps that a high-purity nickel plate is used as a raw material, the high-purity nickel plate is sequentially subjected to the process steps of nickel plate processing, plasma welding, hot rolling, ultrasonic flaw detection and cold rolling, and the ultra-high-purity nickelstrip is prepared. According to the method, in view of the problems of high inclusion content and low purity of a domestic pure nickel strip, through the direct rolling of a high-grade electrolytic nickel plate, the process flow is shortened, the cost is lowered, the production efficiency is improved, on the premise of ensuring good mechanical properties, the high-purity nickel strip prepared bythe method can effectively avoid the reduction of qualified rate of the nickel strip caused by inclusions brought into the smelting process, the purity of materials is ensured, the product qualification rate is increased, and moreover, the pollution problem caused by inherent interlayer defects of the electrolytic nickel plate is solved; and the method is particularly suitable for the demands of electronic and mechanical industries with high quality requirements for the pure nickel strip, and high practicability is achieved.

Description

technical field [0001] The invention relates to the technical field of preparation of high-quality ultra-high-purity nickel metal strips, and more specifically, relates to a method for preparing ultra-high-purity nickel strips with a short process and low cost. Background technique [0002] Pure metallic nickel is one of the important strategic metals. It has excellent characteristics such as corrosion resistance, high temperature resistance, good shape, and high strength. It is widely used in aviation, aerospace, electronics, machinery, petrochemicals, electric vacuum devices and other fields. In recent years, the application field of pure nickel strip has been continuously expanded, and the demand has been continuously increased. However, in some special fields such as electronics and machinery, users only pay attention to the purity of metal nickel strip products (for example, the purity of metal nickel is required to be ≥ 99.99%) and the content of inclusions, and there ...

AI Technical Summary

Problems solved by technology

The present invention aims at the problems of high content of inclusions and low purity of domestically produced pure nickel strips, through direct rolling of high-grade electrolytic nickel plates, which shortens the process flow, reduces costs, and improves production efficiency, and is prepared by the preparation method of the present invention. Under the premise of ensuring good mechanical properties, the high-purity nickel strip not only effectively avoids the reduction of nickel strip qualification rate caused by inclusions brought in during the smelting process, but also ensures the purity of the material and improves the product qualification rate. Pollution problems caused by existing middle layer defects

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