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Steel plate and production method thereof

A production method and steel plate technology, which is applied in the field of steel plate production, can solve problems such as difficult welding, unsatisfactory strength and wear resistance, and high cost, and achieve low usage of alloy elements, simple and easy-to-operate production method, and good low-temperature impact toughness Effect

Active Publication Date: 2019-05-21
NANYANG HANYE SPECIAL STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current steel plate needs to add more alloy elements, the cost is high, it is not easy to weld, and the strength and wear resistance are not ideal

Method used

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  • Steel plate and production method thereof
  • Steel plate and production method thereof
  • Steel plate and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] The molten iron is produced according to the following chemical composition ratio:

[0064] 0.15wt% of C, 0.32wt% of Si, 1.45wt% of Mn, 0.008wt% of P, 0.003wt% of S, 0.169wt% of Cr, 0.26wt% of Ni, 0.021wt% of Ti, 0.0013wt% of B, 0.023wt% of Als, 0.00237wt% of Ca, the balance being Fe and trace impurity elements; wherein, the carbon equivalent CEV is 0.44.

[0065] Then produce according to the following process steps, including:

[0066] The obtained molten iron is subjected to KR molten iron pretreatment: the slag before and after the slag is removed from the molten iron at the station, the thickness of the slag layer on the liquid surface is 18mm, and the S content in the molten iron is 0.004wt% after the molten iron is stirred and desulfurized by KR. Among them, the desulfurization period is 22min, and the desulfurization temperature drop is 20°C.

[0067] Subsequent converter smelting: molten iron S is 0.004wt%, P is 0.06wt%, molten iron temperature is 1350°C, arg...

Embodiment 2

[0078] The molten iron is produced according to the following chemical composition ratio:

[0079] 0.22wt% of C, 0.35wt% of Si, 1.42wt% of Mn, 0.013wt% of P, 0.006 of S, 0.215wt% of Cr, 0.45wt% of Ni, 0.025wt% of Ti, 0.0015wt% of B. 0.022wt% of Als, 0.00245wt% of Ca, the balance being Fe and trace impurity elements; wherein, the carbon equivalent CEV is 0.53.

[0080] Then produce according to the following process steps, including:

[0081] The obtained molten iron is subjected to KR molten iron pretreatment: the slag before and after the slag is removed from the molten iron at the station, the thickness of the slag layer on the liquid surface is 18mm, and the S content in the molten iron is 0.005% after the molten iron is stirred and desulfurized by KR. Among them, the desulfurization period is 22min, and the desulfurization temperature drop is 19°C.

[0082] Subsequent converter smelting: the molten iron S into the furnace is 0.005wt%, P is 0.08wt%, the temperature of the...

Embodiment 3

[0092] The molten iron is produced according to the following chemical composition ratio:

[0093] 0.23wt% of C, 0.39wt% of Si, 1.45wt% of Mn, 0.012wt% of P, 0.005wt% of S, 0.236wt% of Cr, 0.46wt% of Ni, 0.026wt% of Ti, 0.0015wt% of B. 0.026wt% of Als, 0.00342wt% of Ca, the balance being Fe and trace impurity elements; wherein, the carbon equivalent CEV is 0.55.

[0094] Then produce according to the following process steps, including:

[0095] The obtained molten iron is subjected to KR molten iron pretreatment: the molten iron at the arrival station removes the front slag and the post-removal slag, the thickness of the liquid surface slag layer is 20mm, and the S content in the molten iron is 0.005wt% after the molten iron is stirred and desulfurized by KR. Among them, the desulfurization period is 21min, and the desulfurization temperature drop is 19°C.

[0096] Subsequent converter smelting: the molten iron S into the furnace is 0.005wt%, P is 0.08wt%, the temperature of...

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Abstract

The invention provides a steel plate and a production method thereof, and belongs to the technical field of steel plate production. The steel plate comprises the following chemical components of raw materials in percentage by mass: 0.1-0.25 wt% of C, P not more than 0.015 wt%, S not more than 0.01, 0.01-0.04 wt% of Als, 0.001-0.005 wt% of Ca, and the balance of Fe and micro impurity elements. Thesteel plate is reasonable in combination of chemical components, low in use level of alloy elements and excellent in low-temperature impact toughness, facilitates scene welding, and in particular, issuitable for use under cold weather conditions. The production method comprises the steps of production of molten iron according to chemical component ratios, pretreatment, converter smelting, argon station aluminum feeding line, LF furnace refining, vacuum refining, continuous casting, cast blank heating, rolling control and cooling control, stack cooling and heat treatment. The method is simpleand easy to operate, facilitates improvement of the quality of the steel plate, and improves the mechanical performances of the steel plate.

Description

technical field [0001] The invention relates to the technical field of steel plate production, in particular to a steel plate and a production method thereof. Background technique [0002] Wear-resistant steel plates are widely used in particularly harsh environments such as mining, agriculture, cement production, ports, electric power and metallurgy and other mechanical products, requiring high strength and high wear resistance. However, the current steel plate needs to add more alloying elements, the cost is high, it is not easy to weld, and the strength and wear resistance are not ideal. Contents of the invention [0003] The first object of the present invention includes providing a steel plate, which has a reasonable combination of chemical components, low alloying element usage, good low-temperature impact toughness, and is conducive to on-site welding, especially suitable for use in cold weather conditions. [0004] The second object of the present invention includ...

Claims

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Application Information

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IPC IPC(8): C22C38/02C22C38/04C22C38/06C22C38/50C22C38/54C22C38/58C21D8/02C21D1/18
Inventor 朱书成庞百鸣许少普李忠波张国栋刘庆波唐郑磊康文举袁书欣张涛张占杰董真真陈熙袁永旗于飒杨春袁继恒郑海明陈良全微波
Owner NANYANG HANYE SPECIAL STEEL CO LTD
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