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Method for producing flaw detection and performance guaranteed Q235B steel plate with 80-100mm in argon station

A performance-guaranteed and performance-guaranteed steel plate technology, which is applied in the production of Q235B 80-100mm steel plates with guaranteed flaw detection and performance in the argon station, can solve the problems of long cycle, long process, and reduced production costs, so as to improve the production rhythm and reduce the production cost. cost, and the effect of shortening the production process

Inactive Publication Date: 2012-02-08
NANYANG HANYE SPECIAL STEEL CO LTD
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Problems solved by technology

This method can solve the disadvantages of long process and long cycle in traditional LF refining or LF refining plus vacuum production, and can greatly reduce production costs

Method used

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  • Method for producing flaw detection and performance guaranteed Q235B steel plate with 80-100mm in argon station

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Embodiment Construction

[0009] According to the method of the present invention for producing steel plates with Q235B 80-100mm specification guaranteed flaw detection and performance at an argon station, the chemical composition of the Q235B 80-100mm specification guaranteed flaw detection steel plate is: C: 0.10-0.19%, Si: 0.15-0.30 %, Mn: 0.50~0.80%, P≤0.023%, S≤0.015%, Als≤0.020%, N≤0.005%; the rest is Fe and unavoidable impurities; its production method is to take desulfurized molten iron from converter molten iron, molten iron S content ≤ 0.003%; Converter adopts top-bottom re-production smelting, steel tapping C ≥ 0.08%; Argon station uses ladle refining slag to make slag, and prolongs argon blowing time ≥ 12min; Continuous casting slabs are poured at a low casting speed of 0.70m / min , the superheat of the molten steel in the tundish is controlled at 15±5°C; after the slab is cut, the heat preservation cover is used for heat preservation and slow cooling for > 48 hours; after the steel plate ...

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Abstract

The invention discloses a method for producing a flaw detection and performance guaranteed Q235B steel plate with 80-100mm employing argon station steel. The produced steel plate of the specification comprises chemical components of 0.10-0.19% of C, 0.15-0.30% of Si, 0.50-0.80% of Mn, P no more than 0.023%, S no more than 0.015%, Als no more than 0.020% and N no more than 0.005%. The invention employs a 250mm continuous casting billet; and a production process flow comprises steps of: molten iron desulphurization, treatment in 120t top-bottom combined blown converter, continuous casting, casting blank insulation and slow cooling, rolled steel plate stack cooling, finishing, examination and warehouse entering. Compared with a prior art, the invention employs argon station steel to produce flaw detection guaranteed steel plate, cancels a routine LF refining production, shortens a production flow and reduces costs per ton of steel; meanwhile, a 250mm thickness section is adopted in the production to increase production rhythm and substantially reduce production costs, compared with a routine section thicker than 250mm or mold ingot.

Description

technical field [0001] The invention relates to a method for producing Q235B 80-100mm specification guaranteed flaw detection and performance guaranteed steel plate by adopting steel on argon station, which is suitable for domestic small and medium-sized enterprises to produce and use under the condition of no refining means. Background technique [0002] With the increasing demand for defect-free steel plates in the steel market, Q235B thick-gauge steel plates with guaranteed flaw detection and performance have become the most important products in the current market. However, at present, domestic steel mills generally adopt LF refining or LF refining plus vacuum production process when producing this steel plate with a thickness of 80-100 mm, and the section of the billet used is a billet with a rolling specification compression ratio > 3. The process is long, the production cost is high, and the quality is unstable. In order to solve the production process obstac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/06
Inventor 朱书成赵迪许少普张立新崔冠军杨东张少辉王新乔华伟袁恒张兵刘丹谢聪聪
Owner NANYANG HANYE SPECIAL STEEL CO LTD
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