Thickness 0.5mm tensile strength ≥ 1000mpa painted bundled strip steel and production method
A technology of tensile strength and painted strapping, which is applied in the field of painted strapping steel and production, can solve the problems of heavy environmental pollution, easy peeling off of the paint film, low stability, etc., and achieve good corrosion resistance
Inactive Publication Date: 2015-07-29
武汉钢铁有限公司
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Problems solved by technology
However, the strapping heat treatment process is carried out in a Pb-Bi furnace, and highly toxic elements Pb and Bi are easily attached to the surface of the product, which greatly pollutes the environment
On the other hand, the high content of Si in the raw steel grades leads to poor surface quality of the strapping, easy peeling off of the paint film, and low stability
Method used
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[0027] The present invention is described in detail below:
[0028] Table 1 is the value list of each embodiment of the present invention and comparative example;
[0029] Table 2 is the main process parameter list of each embodiment of the present invention and comparative example;
[0030] Table 3 is each embodiment of the present invention and comparative performance inspection monitoring situation list.
[0031] Each embodiment of the present invention is produced according to the following steps:
[0032] 1) Smelting and conventional heating of the continuous casting slab;
[0033] 2) Carry out rough rolling, control its starting rolling temperature to be 1050~1150 ℃;
[0034] 3) Carry out finish rolling, control its finish rolling temperature to be 900~950 ℃; The thickness after finish rolling is 2.0 mm;
[0035] 4) Carry out coiling and hot rolling pickling, and control the coiling temperature to be 550~620 °C;
[0036] 5) Carry out cold rolling, adopt repeated rol...
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Abstract
The tensile strength of 0.5mm thickness ≥ 1000MPa painted strapping steel, its composition and weight percentage: C: 0.22~0.30%, Mn: 1.7~2.2%, Si: 0.005~0.010%, P: ≤0.015%, S: ≤0.015%, Als: 0.050~0.070%, Nb: 0.052~0.080%; production steps: smelting and conventional heating of continuous casting slabs; rough rolling; finish rolling; coiling and hot rolling pickling; cold rolling; Tape. In the case of a thickness of only 0.5mm, the product of the present invention has a tensile strength ≥ 1000 MPa, an elongation ≥ 10%, repeated bending times of not less than 10 times, and no delamination and brittle fracture. After being placed in the indoor atmospheric environment for 2 months, no obvious corrosion was found, and the corrosion resistance performance is good, which fully meets the needs of bundling and packaging of large coils of heavy cold-rolled coils.
Description
technical field [0001] The invention relates to a steel for strapping and a production method thereof, in particular to a painted strapping steel and a production method thereof, specifically a painted strapping steel with a thickness of 0.5 mm and a tensile strength ≥ 1000 MPa and a production method thereof. Background technique [0002] Ultra-high-strength lacquered strapping is a cold-rolled deep-processed product with high added value that "guarantees safe storage and transportation and improves product quality", and is widely used in the bundling and packaging of large and heavy cold-rolled coils. Generally, it should have the characteristics of "tensile strength not less than 1000 MPa, elongation not less than 10%, repeated bending times not less than 10 times, no delamination and brittle fracture, and excellent corrosion resistance". Based on market demand, this project develops high-performance and high-value-added ultra-high-strength painted straps to improve the e...
Claims
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IPC IPC(8): C22C38/12C21D8/02
Inventor 黄菲陶军晖张兆丽何振华吴远东王丹
Owner 武汉钢铁有限公司