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High strength cold rolling packaging steel belt and production method thereof

A high-strength, steel strip technology, applied in the field of metallurgy, can solve the problems of affecting popularization and use, high smelting costs, low tensile strength and high-strength cold-rolled packaging steel strips, etc., to achieve good prospects for popularization and use, improve anti-corrosion performance, The effect of low production cost

Inactive Publication Date: 2009-07-22
PANGANG GROUP RESEARCH INSTITUTE CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The chemical composition design of high-strength cold-rolled packaging steel strip usually adopts low C—Mn alloying or trace Nb alloying treatment plan. The Mn content is generally 1.00%, and the Nb content is generally 0.020%. The hot rolling process adopts controlled rolling and controlled cooling. After cold rolling, the steel strip is produced by off-line continuous heat treatment. Its technical feature is that the addition of alloying elements brings about solid solution strength enhancement and precipitation strengthening. However, the addition of a large amount of alloying elements leads to high smelting costs. Affected the popularization and use of the above methods
At present, there is no high-strength cold-rolled packaging steel strip with high tensile strength and low cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Example 1 Preparation of high-strength cold-rolled packaging steel strip

[0038] a. Smelting molten steel: The smelting equipment is a 120-ton top-blown converter. The blast furnace molten iron is used as the raw material. The temperature of the blast furnace molten iron is 1377°C. Steelmaking auxiliary materials are added to smelt to 1690°C to tap the steel to the molten steel tank. Add 1.2 tons of aluminum when tapping 1 / 3 Ferromanganese (Wuxi Juyuan Alloy Co., Ltd.) pre-deoxidation, 0.05Kg deoxidizer aluminum pellets (Wuxi Juyuan Alloy Co., Ltd.) for deoxidation, and then add pitch coke (Panzhihua Yangcheng Metallurgical Accessories Co., Ltd.) to the deoxidized molten steel and ferromanganese (Dechang Ferroalloy Co., Ltd.), so that the content of each component in molten steel is (based on the total weight of molten steel, wt%) C: 0.16, Si: 0.03%, Mn: 0.39, P: 0.025, S: 0.011, Al: 0.03, and the rest is Fe. Then carry out bottom blowing argon gas treatment on the mo...

Embodiment 2

[0049] Embodiment 2 The preparation of high-strength cold-rolled packaging steel strip

[0050] The preparation method of the high-strength cold-rolled packaging steel strip is basically the same as in Example 1, except that the composition of molten steel obtained by converter smelting is (wt%) C: 0.15%, Si: 0.04%, Mn: 0.41%, P: 0.021% , S: 0.016%, Al: 0.04%, the rest is Fe, and use the aforementioned molten steel to produce steel slabs, the components of which are (wt%) C: 0.15%, Si: 0.04%, Mn: 0.41%, P: 0.021%, S: 0.016%, Al: 0.04%, and the rest is Fe. Steel billets are used to produce high-strength cold-rolled packaging strips. The slab exit temperature is 1215°C, the final rolling temperature is 888°C, and the coiling temperature is 555°C. The thickness of the hot-rolled finished product is 3.25mm, and the thickness of the cold-rolled finished product is 0.9mm. The ratio was 72.3%, and the blue color temperature was 390°C.

[0051] The mechanical properties of the prepa...

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Abstract

The invention relates to a cold rolling packaging steel belt and a preparation method thereof, which belong to the metallurgical technology field. The technological problem to be solved by the invention is that a high strength cold rolling packaging steel belt with higher tensile strength and low cost and a preparation method thereof are provided. The chemical components of the packaging steel belt are as follows (wt percent): 0.11 percent to 0.17 percent of C, 0 to 0.05 percent of Si, 0.25 percent to 0.55 percent of Mn, 0 to 0.025 percent of P, 0 to 0.020 percent of S, 0.02 percent to 0.08 percent of Al and 99.099 percent to 99.618 percent of Fe. The preparation method comprises the steps of billet heating, hot rolling, cooling, coiling, pickling, cold rolling and bluing. The tensile strength of the made steel belt finished product is more than or equal to 800MPa, the elongation is more than or equal to 10 percent. The steel belt has good performance of repeated bending, simple craft, low cost and wide application in the packaging of steel products.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a cold-rolled packaging steel strip and a preparation method thereof. Background technique [0002] In recent years, packaging steel strips have played a very important role in market competition. The quality of steel strips for packaging directly affects the operating rate of each process, the quality of steel product packaging, the market competitiveness of products and the reputation of enterprises. The types of packing belts can be divided into three grades of ordinary strength, high strength and super high strength according to the strength level. High-strength and super-strength packaging belts are used for bundling steel coils before entering the bell annealing furnace and packaging finished products weighing more than 5 tons, and ordinary-strength packaging belts are used for the rest. The performance requirements of steel strips for high-strength packagi...

Claims

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Application Information

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IPC IPC(8): C22C38/06C22C33/04C21C5/28C21C7/06
Inventor 刘庆春李军程兴德于丹刘建华
Owner PANGANG GROUP RESEARCH INSTITUTE CO LTD
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