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Low-alloy high-strength wide and thin steel plate and production method thereof

A low-alloy high-strength, production method technology, used in metal rolling, metal rolling, metal processing equipment, etc., can solve the problem of affecting the performance of wide and thin steel plates, difficult to control the shape of finished steel plates, and many unplanned investments, etc. problems, to achieve the effect of reducing unplanned quantities, shortening production cycles, and considerable economic benefits

Inactive Publication Date: 2012-07-04
WUYANG IRON & STEEL +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Because this kind of steel plate is wide and thin, if the rolling force of the rolling mill used is low when producing this kind of steel plate, it is difficult to control the shape of the finished steel plate, which will directly affect the quality of the produced wide and thin steel plate products. Performance
Most of the rolling mills currently used by my country's steel plate production enterprises are equipped in the 1970s, and their rolling force is only 4,200 tons, which cannot meet the rolling force requirements of the rolling mills used in the production of wide and thin steel plates. The problem has caused more unplanned investment and steel plate waste to the steel plate production enterprises, and caused greater economic losses to the enterprises

Method used

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  • Low-alloy high-strength wide and thin steel plate and production method thereof

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Embodiment 1

[0017] This embodiment is a specific embodiment of low-alloy high-strength wide thin steel plate, which is composed of the following chemical components in weight percentage: C 0.14%, Si 0.55%, Mn 1.6%, P 0.014%, S 0.030%, V 0.36%, the balance is Fe and unavoidable impurities.

[0018] The production method of the low-alloy high-strength wide thin steel plate of this embodiment comprises the following steps:

[0019] Steelmaking process: The molten steel is first smelted in an electric furnace to ensure slag-free tapping, and a deoxidizer is added to the molten steel for pre-deoxidation; the tapping temperature is 1560-1600°C; then it is sent to the LF refining furnace for refining to strengthen the deoxidation and ensure the white slag retention time 40min, the total effective refining time is 60min; finally vacuum treatment in VD furnace, the vacuum treatment time is below 66Pa and the holding time is ≥ 15 minutes;

[0020] Heating billet step: Put the billet into the heati...

Embodiment 2

[0023] This embodiment is a specific embodiment of low-alloy high-strength wide thin steel plate, which is composed of the following chemical components in weight percentage: C 0.18%, Si 0.40%, Mn 1.4%, P 0.011%, S 0.030%, V 0.34%, the balance is Fe and unavoidable impurities.

[0024] The production method of the low-alloy high-strength wide thin steel plate of this embodiment comprises the following steps:

[0025] Steelmaking process: The molten steel is first smelted in an electric furnace to ensure slag-free tapping, and a deoxidizer is added to the molten steel for pre-deoxidation; the tapping temperature is 1560-1600°C; then it is sent to the LF refining furnace for refining to strengthen the deoxidation and ensure the white slag retention time 20min, the total effective refining time is 40min; finally vacuum treatment in VD furnace, the vacuum treatment time is below 66Pa and the holding time is ≥ 15 minutes;

[0026] Heating billet step: Put the billet into the heati...

Embodiment 3

[0029] This embodiment is a specific embodiment of low-alloy high-strength wide thin steel plate, which is composed of the following chemical components in weight percentage: C 0.17%, Si 0.30%, Mn 1.43%, P 0.012%, S 0.030%, V 0.35%, the balance is Fe and unavoidable impurities.

[0030] The production method of the low-alloy high-strength wide thin steel plate of this embodiment comprises the following steps:

[0031]Steelmaking process: molten steel is first smelted in an electric furnace to ensure slag-free tapping, and deoxidizer is added to the molten steel for pre-deoxidation; the tapping temperature is 1560-1600°C; then it is sent to the LF refining furnace for refining to strengthen deoxidation and ensure white slag retention time 20min, the total effective refining time is 40min; finally vacuum treatment in VD furnace, the vacuum treatment time is below 66Pa and the holding time is ≥ 15 minutes;

[0032] Steps of heating the billet: Put the billet into the heating fur...

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Abstract

The invention relates to the technical field of steel, and particularly discloses a low-alloy high-strength wide and thin steel plate and a production method of the steel plate. The low-alloy high-strength wide and thin steel plate consists of the following chemical components in percentage by weight: not more than 0.18% of C, not more than 0.55% of Si, 1.4-1.6% of Mn, not more than 0.030% of P, not more than 0.030% of S, 0.34-0.36% of V, and the balance of Fe and inevitable impurities. The steel plate is prepared by a billet heating step, a controlled rolling process step, and a cooling and straightening step. According to the invention, the mechanical properties of the steel plate satisfy technical requirements, and in particular the low-temperature impact toughness is above 100J; a proper amount of V is added, and a controlled rolling process of four-roller high-pressure water pumping assistant cooling and once rolling and a reasonable heating system are adopted, thus the obtained steel plate can satisfy customer requirements; and in addition, the production method has the advantages of low energy consumption, simple production working procedure and short production period, and has considerable economic benefits.

Description

technical field [0001] The invention relates to the technical field of iron and steel, in particular to a low-alloy high-strength wide thin steel plate and a production method thereof. Background technique [0002] With the increase of market demand, the number of wide and thin steel plates currently produced is gradually increasing. Because this kind of steel plate is wide and thin, if the rolling force of the rolling mill used is low when producing this kind of steel plate, it is difficult to control the shape of the finished steel plate, which will directly affect the quality of the produced wide and thin steel plate products. Use performance. Most of the rolling mills currently used by my country's steel plate production enterprises are equipped in the 1970s, and their rolling force is only 4,200 tons, which cannot meet the rolling force requirements of the rolling mills used in the production of wide and thin steel plates. The problem has caused more unplanned investme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/12B21B37/00
Inventor 李欢欢
Owner WUYANG IRON & STEEL
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