A kind of high-strength cold-rolled electro-galvanized strap and production method thereof

Abstract

The invention discloses a high-strength cold-rolled electrogalvanized binding strip, which comprises the following components in percentage by weight (wt%): 0.05-0.10% of C, 0.40-1.0% of Mn, no more than 0.010% of Si, no more than 0.010% of P, no more than 0.010% of S, 0.40-0.60% of Ti, 0.30-0.70% of Cr, 0.50-0.80% of Ni, and 0.030-0.060% of Als; the production method comprises the following steps: melting and continuously casting into blanks, and conducting conventional cast blank heating; conducting hot rolling; conducting conventional pickling; carrying out secondary cold-rolling and secondary annealing; producing strips. The binding strip is 1.0mm thick, the tensile strength is no less than 1000MPa, the elongation rate is no less than 10%, the number of repeated bending times is no less than 10 (R=5mm), an electrogalvanized layer which is uniform and compact, strong in adhesion strength and is 1.0-2.0mu m thick is formed on the surface of the strip, the strip cannot have obvious rusting for 150 days after being placed in interior atmospheric environment, thus being good in profile, and completely meeting the binding and packaging requirement of a precise and ultrathin cold-rolled steel strip.

Description

technical field [0001] The invention relates to a strap and a production method thereof, in particular to a high-strength cold-rolled electrogalvanized strap and a production method thereof. Background technique [0002] High-strength cold-rolled electro-galvanized strapping is a deep-processing product with high added value and broad market prospects. It is mainly used for bundling precision and ultra-thin cold-rolled steel strips. Generally, it should have a thickness of 0.9~1.0mm and a tensile strength of less than It is less than 1000MPa, the elongation is not less than 10%, the number of repeated bending is not less than 10 times (R=5mm), and it is placed in the indoor atmospheric environment for 150 days without obvious corrosion" and other characteristics. [0003] Precision ultra-thin cold-rolled steel strips are mainly used in the manufacture of electronic products such as diodes, triodes, button batteries, and LED brackets. The requirements for surface quality are ...

AI Technical Summary

Problems solved by technology

However, the C content in the raw steel is high, which will greatly affect the adhesion of the zinc layer

At the same time, through hot-dip galvanizing, zinc consumption is relatively large

In addition, the production is completed by one cold rolling and one annealing process, which makes it difficult to fully guarantee the shape of the product

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