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High-strength painted bundling belt and manufacturing method thereof

A lacquered strapping, high-strength technology, applied in the direction of flexible and slender components, packaging, transportation and packaging, etc., can solve the problems of poor anti-rust performance and appearance quality, to eliminate harmful effects, improve σb value, paint even surface effect

Inactive Publication Date: 2013-03-20
武钢集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to overcome the deficiencies of the prior art in terms of antirust performance and poor appearance quality, and to provide an antirust performance and appearance quality that meet the requirements of a tensile strength of not less than 950Mpa and an elongation A of not less than 9%. , low-cost high-strength paint strap and preparation method thereof

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A high-strength paint strap, its chemical composition and weight percentage content are: C: 0.14%; Si: 0.46%, Mn: 1.3%; P: 0.023%; S: 0.02%, Nb: 0.019%, and the balance is Fe and unavoidable impurities.

[0032] Preparation steps:

[0033] 1) Hot rolling into coils after smelting and billet casting;

[0034] 2) Pickling the hot-rolled coils, the temperature of the pickling solution is 65-68°C, the acid value in the pickling solution is 210 g / l, and the pickling speed is 115 m / min;

[0035] 3) Carry out cold rolling, the total reduction rate is 70%, the tensile strength of the steel plate after cold rolling is 985Mpa, and the elongation is 5.5%;

[0036] 4) Unwinding, slitting and deburring;

[0037] 5) Tempering treatment is carried out in a lead-bismuth furnace with an atmosphere of 65%Pb+35%Bi, the temperature in the lead-bismuth furnace is 450-455°C, and the running speed of the steel strip is 5.0m / min;

[0038] 6) Carry out water cooling, and the cooling tempera...

Embodiment 2

[0043] A high-strength paint strap, its chemical composition and weight percentage content are: C: 0.16%; Si: 0.29%, Mn: 1.42%; P: 0.012%; S: 0.014%, Nb: 0.021%, and the balance is Fe and unavoidable impurities.

[0044] Preparation steps:

[0045] 1) Hot rolling into coils after smelting and billet casting;

[0046] 2) Pickling the hot-rolled coils, the temperature of the pickling solution is 70-73°C, the acid value in the pickling solution is 235 g / l, and the pickling speed is 110 m / min;

[0047] 3) Carry out cold rolling, the total reduction ratio is 68%, the tensile strength of the steel plate after cold rolling is 998Mpa, and the elongation is 6.0%;

[0048] 4) Unwinding, slitting and deburring;

[0049] 5) Tempering treatment is carried out in a lead-bismuth furnace with an atmosphere of 70%Pb+30%Bi, the temperature in the lead-bismuth furnace is 482-485°C, and the running speed of the steel strip is 5.5m / min;

[0050] 6) Carry out water cooling, and the cooling temper...

Embodiment 3

[0055] A high-strength paint strap, its chemical composition and weight percentage content are: C: 0.18%; Si: 0.37%, Mn: 1.58%; P: 0.018%; S: 0.019%, Nb: 0.014%, and the balance is Fe and unavoidable impurities.

[0056] Preparation steps:

[0057] 1) Hot rolling into coils after smelting and billet casting;

[0058] 2) Pickling the hot-rolled coils, the temperature of the pickling solution is 76-79°C, the acid value in the pickling solution is 250 g / l, and the pickling speed is 113 m / min;

[0059] 3) Carry out cold rolling, the total reduction rate is 73%, the tensile strength of the steel plate after cold rolling is 1008Mpa, and the elongation is 6.0%;

[0060] 4) Unwinding, slitting and deburring;

[0061] 5) Tempering treatment is carried out in a lead-bismuth furnace with an atmosphere of 80%Pb+20%Bi, the temperature in the lead-bismuth furnace is 490-500°C, and the running speed of the steel strip is 6.0m / min;

[0062] 6) Carry out water cooling, and the cooling temp...

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Abstract

The invention discloses a high-strength painted bundling belt. The high-strength painted bundling belt comprises the following chemical components by weight percent: 0.12-0.20% of C, 0.2-0.6% of Si, 1.2-2.0% of Mn, less than or equal to 0.025% of P, less than or equal to 0.02% of S and 0.01-0.05% of Nb. The high-strength painted bundling belt is prepared by the steps of smelting, casting a blank, and then carrying out hot-rolling to form coils; carrying out acid cleaning; carrying out cold rolling; uncoiling, splitting and conducting deburring; carrying out tempering treatment in a lead-bismuth furnace; carrying out water cooling; painting by adopting a dip-coating wiping mode and carrying out sectional baking; and waxing and drying by adopting hot air. The high-strength painted bundling belt disclosed by the invention has the advantages that since a proper amount of Nb is added, the influence on crystal lattice distortion caused by overlarge volume mismatching of enhanced element atoms and Fe atoms is overcome, namely a value sigma b is increased, the overhigh yielding-to-tensile ratio can be restrained, and a steel belt with high strength, good elasticity, excellent mechanical property is produced; and the energy consumption is low, the process is simple, the painted surface is uniform, the anti-rusting performance is good and the process is simple.

Description

technical field [0001] The invention belongs to the field of steel strips for packaging, in particular to a high-strength painted strap and a manufacturing method. Background technique [0002] Packaging steel belt, also known as strapping or steel belt, is a narrow strip packaging material with high tensile strength and certain elongation. It is widely used in the packaging and bundling of steel industry, construction industry, non-ferrous metal industry, light textile products, machinery industry and other products. [0003] Steel strips for packaging can be classified into painted straps, blued straps, and galvanized straps according to the surface state. Painted straps are widely used in packaging of silicon steel and cold-rolled sheets; blued straps are widely used in large Coil heavy hot-rolled coils and profiles are bundled and packaged; galvanized straps are used for bundling and packaging of wooden boxes, color-coated plates, and steel plates. With the continuous ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/04C21D8/04B65D63/02
Inventor 何振华张建国吴远东黄菲钱涛纪政
Owner 武钢集团有限公司
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