Mickel coated steel strap for deep drawing and preparation method

Abstract

This invention provides a method for processing nickel-plated deep shocked steel band. The processing procedures are: (1). low carbon band is proceeded continuous electro-deposition of nickel; (2) under the protective atmosphere (H2 75%, N2 25%), proceeding continuous annealing, then continuous laser thermal shock treatment; (3). cold-rolling. This invention also provides the nickel-plated, deep-shocked steel band produced by above-said method. This inventive steel band has advantages of: tensile strength=270-420 MPa, the ductility ratio being not less than 30%, hardness=120-200, thickness of nickel=2-3 micrometer, porosity ratio being less than 4 holes / sq cm, extension ratio being not less than 8%, corrosion property reaching grade 8. It is can be used for the shell of cells with high performance.

Description

technical field [0001] The invention relates to a production method of a nickel-coated deep-drawing steel strip and the nickel-coated deep-drawing steel strip produced by the method. The nickel-coated deep-drawing steel strip is composed of electrodeposited nickel coating and low-carbon steel strip closely Combined, it has excellent elongation and corrosion resistance and can be used as a casing material for high-performance batteries. Background technique [0002] Electrodeposited nickel-coated deep-drawn steel strip is a new type of battery shell material that is closely combined with electrodeposited nickel coating and low-carbon steel substrate, has excellent elongation and anti-corrosion ability, and can be directly formed without subsequent electroplating treatment. Realize the characteristics of continuous production. With the vigorous development of industries such as portable communication equipment, notebook computers, word processors and electric tools, the batte...

AI Technical Summary

Problems solved by technology

However, since the Fe-Ni-C diffusion layer is not formed in the diffusion layer of the nickel-coated deep-drawing steel strip made in the prior art, and the Fe / (Ni+Fe) in the diffusion layer can be as high as 30wt%, which easily leads to iron exposure. high rate

Moreover, the nickel-coated deep-drawing steel strip of the prior art has low tensile strength and hardness when the elongation is high; or, when the tensile strength and hardness are high, the elongation is low, so that In the prior art, the elongation, tensile strength and hardness of the nickel-coated deep-drawing steel strip cannot form a good matching relationship

These deficiencies of the prior art nickel-coated deep-drawing steel strip make it unable to meet the needs of the current growing industry for nickel-coated deep-drawing steel strip in terms of mechanical properties, coating porosity, corrosion resistance, etc.