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Production method of hot-rolled acid washing steel plate for 250 MPa-grade single-surface enamel

A hot-rolled pickling and production method technology, which is applied in the field of hot-rolled pickling plates, can solve the problems of poor quality stability, poor anti-scaling performance, high production cost of enamelled special steel, and achieve good performance stability, stable performance, The effect of low production cost

Inactive Publication Date: 2018-02-06
BENGANG STEEL PLATES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a production method of 250MPa level single-sided enamel hot-rolled pickled steel plate, to solve the problem of poor scale explosion resistance of hot-rolled pickled plate produced in the prior art, high production cost of enamelled special steel, Poor quality stability and other issues

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] In this embodiment, the composition of the high-titanium low-cost alloy used in the hot-rolled pickling steel plate for 250MPa single-sided enamelling is as follows:

[0025] C: 0.02%, Si: 0.01%, Mn: 0.15%, P: 0.015%, S: 0.010%, Als (acid-soluble aluminum): 0.025%, Ti: 0.042%, N: 0.003%, and the balance is iron and unavoidable impurities.

[0026] In the present embodiment, the production method of hot-rolled pickled steel plate for 250MPa single-sided enamelling is as follows:

[0027] 1) Smelt 250MPa grade single-sided enamel hot-rolled pickled steel plate alloy according to the conventional method, and cast it into a billet;

[0028] 2) Place the billet in a heating furnace and heat it to 1230°C, roll at 1030°C, cool in laminar flow to 650°C for coiling, pickle and oil. The yield strength of the product is 313MPa, and the elongation after breaking is 38%.

Embodiment 2

[0030] In this embodiment, the composition of the high-titanium low-cost alloy used in the hot-rolled pickling steel plate for 250MPa single-sided enamelling is as follows:

[0031] C: 0.04%, Si: 0.03%, Mn: 0.24%, P: 0.012%, S: 0.008%, Als (acid-soluble aluminum): 0.020%, Ti: 0.045%, N: 0.002%, and the balance is iron and unavoidable impurities.

[0032] In the present embodiment, the production method of hot-rolled pickled steel plate for 250MPa single-sided enamelling is as follows:

[0033] 1) Smelt 250MPa grade single-sided enamel hot-rolled pickled steel plate alloy according to the conventional method, and cast it into a billet;

[0034] 2) Place the billet in a heating furnace and heat it up to 1200°C, roll it at 1080°C, cool it in laminar flow to 620°C for coiling, pickle and oil it. The yield strength of the product is 327MPa, and the elongation after breaking is 37%.

Embodiment 3

[0036] In this embodiment, the composition of the high-titanium low-cost alloy used in the hot-rolled pickling steel plate for 250MPa single-sided enamelling is as follows:

[0037] C: 0.03%, Si: 0.02%, Mn: 0.20%, P: 0.010%, S: 0.012%, Als (acid-soluble aluminum): 0.035%, Ti: 0.038%, N: 0.004%, and the balance is iron and unavoidable impurities.

[0038] In the present embodiment, the production method of hot-rolled pickled steel plate for 250MPa single-sided enamelling is as follows:

[0039] 1) Smelt 250MPa grade single-sided enamel hot-rolled pickled steel plate alloy according to the conventional method, and cast it into a billet;

[0040] 2) Place the billet in a heating furnace and heat it to 1250°C, roll it at 1050°C, cool it in laminar flow to 680°C for coiling, pickle and oil. The yield strength of the product is 292MPa, and the elongation after breaking is 40%.

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Abstract

The invention relates to the field of hot-rolled acid washing plates, in particular to a production method of a hot-rolled acid washing steel plate for a 250 MPa-grade single-surface enamel. Accordingto percentage by weight, the hot-rolled acid washing plate comprises the following alloy components: 0.01-0.05% of C, Si not more than 0.05%, 0.10-0.30% of Mn, P not more than 0.020%, S not more than0.015%, 0.015-0.040% of Als, 0.035-0.050% of Ti, N not more than 0.0050%, and the balance of iron and inevitable impurities; and a cast blank is put in a heating furnace for heating to 1180-1280 DEGC, is rolled in a section of 900-1100 DEG C, and is laminarly cooled to 600-700 DEG C for winding, acid washing and oiling. The performances of the hot-rolled acid washing plate are adopted to satisfythe yield strength of not less than 250 MPa and the percentage elongation of not less than 28%; and such problems as weaker scale explosion resistance of a hot-rolled acid washing plate produced by the prior art and higher production cost and weak quality stability of special enamel steel are solved.

Description

technical field [0001] The invention relates to the field of hot-rolled pickled steel plates, in particular to a production method of hot-rolled pickled steel plates for 250MPa single-sided enamelling. Background technique [0002] Hot-rolled pickled sheet is made of high-quality hot-rolled sheet as raw material. After the pickling unit removes the oxide layer, trims the edge, and finishes, the surface quality and use requirements (mainly cold-formed or stamping performance) are between hot-rolled sheet and Intermediate product between cold rolled sheets. [0003] Steel for enamelling puts forward very high requirements on the scale explosion resistance and adhesion performance of raw steel plates. At present, ordinary products cannot meet the scale explosion resistance of enamelled steel. Therefore, a special steel for enameling is in urgent need of research and development. Cold-rolled enamelled steel has been realized well after being applied in the enamel industry, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/04C22C38/06C22C38/14C22C38/02C21D8/02
CPCC22C38/04C21D8/0205C22C38/001C22C38/02C22C38/06C22C38/14
Inventor 王旭生康海军杨得草于立伟王会忠张海宾肖辉李铁詹恒科王锡龙
Owner BENGANG STEEL PLATES
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