Steel plate for structure with excellent marine atmospheric corrosion resistance and production method thereof

A marine atmosphere and production method technology, applied in the field of metallurgy, to achieve the effect of excellent corrosion resistance and excellent resistance

Active Publication Date: 2013-07-10
NANJING IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no structural steel plate that meets the requirements for resisting marine atmospheric corrosion. Therefore, the

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] The corrosion-resistant steel plate for marine and atmospheric environments in this embodiment includes the following components by weight percentage: C: 0.04%, Si: 0.20%, Mn: 1.30%, P: 0.080%, S: 0.0020%, Ni: 3.20%, Mo: 0.10%, Cu: 0.35%, Nb: 0.060%, Ca: 0.0010%, Alt: 0.021%, N: 0.0045%, and the rest are iron and unavoidable impurities.

[0013] The production method of the corrosion-resistant steel plate for marine and atmospheric environments in this embodiment includes a controlled rolling and controlled cooling process. The production is carried out by using the steel coil rolling mill production line or the medium and heavy plate production line, including the converter or electric furnace smelting process, the refining process outside the furnace, the vacuum treatment process, the continuous casting process, the controlled rolling process and the controlled cooling process; the heating temperature of the continuous casting slab before rolling is 1200 ℃; in the con...

Embodiment 2

[0015] The corrosion-resistant steel plate for marine and atmospheric environments in this embodiment includes the following components by weight percentage: C: 0.06%, Si: 0.25%, Mn: 1.10%, P: 0.010%, S: 0.0060%, Ni: 0.08%, Mo : 0.20%, Cu: 0.15%, Cr: 5.50%, Nb: 0.007%, RE: 0.030%, Ca: 0.0015%, Alt: 0.043%, N: 0.0035%, and the rest are iron and unavoidable impurities;

[0016] The production process of corrosion-resistant steel plates for marine and atmospheric environments in this embodiment is produced using a steel plate production line or a steel plate production line, including a converter or electric furnace smelting process, an out-of-furnace refining process, a vacuum treatment process, a continuous casting process, and a controlled rolling process. Manufacturing process and controlled cooling process; continuous casting slab heating temperature before rolling: 1180°C; in the controlled rolling process, the finishing temperature of rough rolling: 1070°C, and the starting...

Embodiment 3

[0018] The corrosion-resistant steel plate for the marine and atmospheric environment of this embodiment comprises the following components by weight percentage:

[0019] C: 0.08%, Si: 0.40%, Mn: 0.60%, P: 0.030%, S: 0.010%, Ni: 0.75%, Cu: 1.20%, Mo: 0.50%, Cr: 0.55%, Nb: 0.020%, Ti: 0.080%, V: 0.020%, Sb: 0.10%, Ca: 0.0030%, Alt: 0.031%, N: 0.0065%, and the rest are iron and unavoidable impurities;

[0020] The production process of corrosion-resistant steel plates for marine and atmospheric environments in this embodiment is produced using a steel plate production line or a steel plate production line, including a converter or electric furnace smelting process, an out-of-furnace refining process, a vacuum treatment process, a continuous casting process, and a controlled rolling process. Manufacturing process and controlled cooling process; continuous casting slab heating temperature before rolling: 1150°C; in the controlled rolling process, the finishing temperature of rough...

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Abstract

The invention discloses a steel plate for structure with excellent marine atmospheric corrosion resistance and a production method thereof. The steel plate comprises the chemical ingredients by weight percent: 0.001-0.08% of C, 0.10-0.50% of Si, 0.50-1.60% of Mn, 0.080% or less of P, 0.025% or less of S, 0.01-3.50% of Ni, 0.01-0.50% of Mo, 0.01-1.20% of Cu, 0.001-0.060% of Nb, 0.0005-0.0040% of Ca, 0.010-0.080% of Al, 0.0080% or less of N, the balance of Fe and inevitable impurities. A controlled rolling and cooling process is adopted; the heating temperature of a continuous casting billet before rolling is 1100-1250 DEG C; the roughing end temperature is 990-1080 DEG C; the finishing rolling temperature is 850-970 DEG C; laminar cooling is adopted after rolling; the final rolling temperature is 250-750 DEG C; and the cooling speed is 5-40 DEG C/s. The situation that a steel ball has excellent resistance to the marine-atmosphere environment by low carbon and alloy ingredient is ensured.

Description

technical field [0001] The invention belongs to the field of metallurgy and relates to a corrosion-resistant steel for marine and atmospheric environments, in particular to a structural steel plate with excellent resistance to marine and atmospheric corrosion and a production method thereof. Background technique [0002] With the development of my country's socialist construction, the demand for steel in marine and coastal areas will increase. The "National "Twelfth Five-Year" Marine Science and Technology Development Plan" proposes that during the "Twelfth Five-Year Plan" period, the contribution rate of marine science and technology to the marine economy will increase from 54.5% during the "Eleventh Five-Year Plan" period to 60%. The development of technology will inevitably increase the steel used in ocean and coastal areas. In the coastal area, due to the high salt content in the ocean atmosphere, the rust layer of ordinary weathering steel will peel off, and the weathe...

Claims

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Application Information

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IPC IPC(8): C22C38/16C22C38/48C22C38/50C22C38/58C22C38/60C21D8/02
Inventor 尹雨群王军赵晋斌
Owner NANJING IRON & STEEL CO LTD
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