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Steel for acid soil corrosion-resistant hot rolling U-shaped steel sheet pile and production method thereof

A technology of soil corrosion and acid resistance, which is applied in the direction of temperature control, etc., to achieve the effect of simple production process, favorable promotion and excellent corrosion performance

Inactive Publication Date: 2010-09-22
WUHAN IRON & STEEL (GROUP) CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Before the present invention, none of the patents disclosed at home and abroad related to the corrosion resistance of hot-rolled steel sheet piles in acid soil

Method used

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  • Steel for acid soil corrosion-resistant hot rolling U-shaped steel sheet pile and production method thereof

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Effect test

Embodiment 1

[0025] Steel for hot-rolled U-shaped steel sheet piles resistant to acid soil corrosion, its chemical composition and weight percentage are: C 0.13%, Mn0.6%, Si 0.10%, S0.02%, P0.02%, Cr 0.5%, Mo 0.15%, the rest is Fe and unavoidable impurities.

[0026] A method for producing steel for hot-rolled U-shaped steel sheet piles resistant to acidic soil corrosion, the steps of which are:

[0027] 1) Smelting: adopt a deoxidation process with a weight percentage of [Al]<0.005%, add lime at a time of 10 kg / ton of steel at the beginning of the furnace for mixed flushing, and the thickness of the slag on the liquid surface is 6 mm;

[0028] 2) Continuous casting: control the pouring temperature at 1570°C to 1575°C, control the superheat of continuous casting at 15°C, casting speed at 1.0 m / min, control the thickness of the mold powder at the liquid level at 2 mm, and cool the mold and the secondary cooling section The amount of water can be controlled according to the requirements of ...

Embodiment 2

[0033] Steel for hot-rolled U-shaped steel sheet piles resistant to acidic soil corrosion, its chemical composition and weight percentage are: C 0.172%, Mn0.85%, Si 0.21%, S0.0198%, P0.0196%, Cr 0.6%, Mo 0.185%, the rest is Fe and unavoidable impurities.

[0034] A method for producing steel for hot-rolled U-shaped steel sheet piles resistant to acidic soil corrosion, the steps of which are:

[0035] 1) Smelting: adopt a deoxidation process with a weight percentage of [Al]<0.005%, add lime at a time of 15 kg / ton of steel at the beginning of the furnace for mixed flushing, and the thickness of the slag on the liquid surface is 8 mm;

[0036] 2) Continuous casting: control the pouring temperature at 1576°C to 1580°C, control the superheat of continuous casting at 20°C, cast at a speed of 1.5 m / min, control the thickness of mold flux on the liquid surface at 3 mm, and cool the mold and the secondary cooling section The amount of water can be controlled according to the requireme...

Embodiment 3

[0041] Steel for hot-rolled U-shaped steel sheet piles resistant to acidic soil corrosion, its chemical composition and weight percentage are: C 0.21%, Mn1.25%, Si 0.35%, S0.0195%, P0.0194%, Cr 0.81%, Mo 0.2%, the rest is Fe and unavoidable impurities.

[0042] A method for producing steel for hot-rolled U-shaped steel sheet piles resistant to acidic soil corrosion, the steps of which are:

[0043] 1) Carry out smelting: adopt the deoxidation process of [Al]<0.005% by weight, add lime at a time at 20 kg / ton of steel at the beginning of the furnace for mixed flushing, and the thickness of the steel slag on the liquid surface is 10 mm;

[0044] 2) Conduct continuous casting: control the pouring temperature at 1575°C to 1580°C, control the superheat of continuous casting at 28°C, cast at 2.0 m / min, control the thickness of the mold flux on the liquid surface at 4.0 mm, and cool the mold and the secondary cooling section The amount of water can be controlled according to the requ...

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Abstract

The invention relates to steel for an acid soil corrosion-resistant hot rolling U-shaped steel sheet pile and a production method thereof. The steel comprises the following components by weight percent: 0.13-0.28% of C, 0.6-1.5% of Mn, 0.10-0.6% of Si, less than or equal to 0.020% of S, less than or equal to 0.02% of P, 0.5-1.2% of Cr, 0.15-0.3% of Mo and the balance of Fe and unavoidable impurities. The method comprises the following steps: melting: adopting less than 0.005% of [Al] to deoxidize, adding lime at a time when discharge is started, wherein the thickness of the slag blanket is 6-15mm; continuous casting: preheating a continuous casting bloom to 300 DEG C, and then heating to 1150-1300 DEG C, and preserving the temperature for 10-30 minutes, wherein the pouring temperature is 1570-1580 DEG C, the degree of superheat is 15-35 DEG C, the casting speed is 1.0-2.0meter / miniute, the thickness of the casting powder is 2-5 millimetres; and rolling: the starting rolling temperature is 1100-1250 DEG C and the finishing rolling temperature is 850-920 DEG C.

Description

technical field [0001] The invention relates to steel for steel sheet piles and a production method thereof, in particular to steel for hot-rolled U-shaped steel sheet piles resistant to acid soil corrosion and a production method thereof. Background technique [0002] The basic structure of the steel sheet pile: one is the steel sheet pile, the other is the joint structure on both sides, and the third is to form the wall in the soil or water. Due to its special structure, it has unique advantages: high strength, light weight, and good water-proof performance; strong durability, with a service life of 20-50 years; reusable, generally 3-5 times; remarkable environmental protection effect, During construction, it can greatly reduce the amount of soil taken and the amount of concrete used, and effectively protect land resources; it has strong disaster relief functions, especially in flood control, landslides, subsidence, and quicksand rescue and disaster relief, and the effect ...

Claims

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Application Information

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IPC IPC(8): C22C38/22C21C7/06B22D11/04B21B37/74
Inventor 任安超吉玉周桂峰董茂松范敬国韩斌朱敏周剑华鲁明正
Owner WUHAN IRON & STEEL (GROUP) CORP
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