A high-strength hot-dip galvanized strap and its production method

Abstract

The invention discloses a high-strength hot galvanized binding ribbon which consists of the following components in percentage by weight: 0.25-0.35% of C, 0.80-1.60% of Mn, not more than 0.010% of Si, less than or equal to 0.010% of P, less than or equal to 0.010% of S, 0.030-0.050% of Ti and 0.030-0.060% of Al. The high-strength hot galvanized binding ribbon is produced by the following steps: smelting, performing continuous casting to form ingots, and heating the ingots; roughing; finish-rolling; rolling; performing conventional electrolytic degreasing; performing cold rolling; and preparing the ribbon. The thickness of the high-strength hot galvanized binding ribbon is 0.60mm, the tensile strength is not less than 980MPa, the elongation is not less than 10%, the repeated bending frequency is not less than 10 (R=5mm), a layered brittle failure phenomenon is avoided, the thickness and uniformity of a zinc layer can be exactly controlled on the premise that the hot galvanized binding ribbon is not obviously rusted when placed in an indoor atmospheric environment for 180 days, and the mechanical property can be adjusted in the hot plating process. Subsequent procedures such as passivation and oil coating are eliminated, so that the process is shortened, and energy consumption is reduced.

Description

technical field [0001] The invention relates to a strap and a production method thereof, in particular to a high-strength hot-dip galvanized strap and a production method thereof. Background technique [0002] High-strength hot-dip galvanized strapping is a cold-rolled deep-processing product with broad market prospects, and is widely used in bundling and packaging of high value-added steel such as cold-rolled automobile sheets and silicon steel sheets. Generally, it should have "tensile strength not less than 950MPa, elongation not less than 10%, repeated bending times not less than 10 times (R=5mm), no delamination and brittle fracture, no obvious corrosion in six months", etc. features. [0003] At present, the market supplies are mainly ordinary blued straps and painted straps. Due to the limited corrosion resistance of the bluing film and paint film, the service life of the product generally does not exceed two months. Once the surface of the strapping is corroded, i...

AI Technical Summary

Problems solved by technology

Due to the low elongation of this product, there is a high possibility of breakage during packaging

In addition, the Si content in the raw steel is high, and the surface quality of the product is not good, which affects the adhesion and corrosion resistance of the zinc layer.

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