Binding strap with the thickness of 1.2 mm for high-temperature annealing and manufacturing method of binding strap

Abstract

The invention discloses a binding strap with the thickness of 1.2 for high-temperature annealing. The binding strap comprises the following raw materials in percentage by weight: 0.10-0.15% of C, 0.50-1.0% of Mn, 0-0.010% of Si, 0-0.010% of P, 0-0.010% of S, 0.030-0.060% of Nb, 0.50-0.80% of Cr, 0.30-0.50% of Ni, and 0.030-0.050% of Als; a manufacturing method comprises the following steps: smelting, performing continuous casting to obtain blank, heating casting blank, performing coarse rolling, and finish rolling, reeling, performing general acid cleaning, performing cold rolling and manufacturing the strap. According to the binding strap, the thickness is 1.2 mm, the tensile strength is not lower than 1,050 MPa, the elongation percentage is not lower than 8%, and the repetition bending times is not lower than 8 (R=5 mm); the phenomena of layering and cracking do not exist, and the strip shape is good; the strap is used for binding the cold-rolled steel reel, after the annealing is conducted at the temperature of 600-650 DEG C and heat preservation is performed for 10 h, the tensile strength of the strap is still maintained above 1000 MPa, the elongation percentage has no obvious change, the phenomena of binding strap breaking and reel looseness do not occurr, and the binding effect is good.

Description

technical field [0001] The invention relates to a strap and a production method thereof, in particular to a strap with a thickness of 1.2 mm for high-temperature annealing and a production method thereof. Background technique [0002] High-temperature annealing strapping is a cold-rolled deep-processing product with broad market prospects. It is widely used for bundling cold-rolled steel coils for annealing in high-temperature environments above 600 °C to prevent expansion and deformation of steel coils due to prolonged heating. According to market demand, such products should have a thickness of 1.2~1.3 mm, a tensile strength of not less than 1000 MPa, an elongation of not less than 8%, and repeated bending times of not less than 8 times (R=5 mm). Delamination cracking phenomenon, long-term use in high temperature environment has good corrosion resistance and can maintain high strength" and other characteristics. [0003] Under normal temperature conditions, ordina...

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Problems solved by technology

However, due to the strong cooling capacity, large internal stress is caused, the product is prone to cracking, and the shape of the plate is difficult to be guaranteed.

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