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High-strength corrosion-resistant flat-bulb steel and production method thereof

A technology for flat bulb steel and corrosion resistance, which is applied in the field of high-strength corrosion-resistant flat bulb steel and its production, can solve problems such as the complex production process of flat bulb steel, achieve excellent mechanical properties, excellent corrosion resistance, and improve uniformity Effect

Active Publication Date: 2020-03-06
ANGANG STEEL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] 2) The production process of bulb flat steel is complex

Method used

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  • High-strength corrosion-resistant flat-bulb steel and production method thereof
  • High-strength corrosion-resistant flat-bulb steel and production method thereof
  • High-strength corrosion-resistant flat-bulb steel and production method thereof

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Embodiment Construction

[0025] A high-strength corrosion-resistant flat bulb steel according to the present invention, the chemical composition of the high-strength corrosion-resistant flat bulb steel is calculated by weight percentage: C 0.050% to 0.100%, Si 0.10% to 0.50%, Mn 1.10% to 1.60%, P 0.010%~0.030%, S≤0.005%, Cu 0.30%~0.50%, Ni 0.40%~0.90%, Cr 0.40%~0.80%, Nb0.010%~0.050%, V 0.010%~0.060% , Ti 0.007% to 0.030%, Sb 0.03% to 0.08%, N0.0080% to 0.0120%, Als 0.015% to 0.030%, and the balance is Fe and unavoidable impurities.

[0026] A kind of production method of high-strength corrosion-resistant bulbous flat steel of the present invention comprises smelting, continuous casting, heating furnace heating, rolling and cooling process, specifically as follows:

[0027] 1) The molten steel smelting process route is: molten iron pretreatment→converter smelting→LF→vacuum refining→billet continuous casting, nitrogen blowing treatment is carried out in the converter or vacuum refining furnace, and the...

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Abstract

The invention relates to high-strength corrosion-resistant flat-bulb steel and a production method thereof. The high-strength corrosion-resistant flat-bulb steel comprises the following chemical components of, in percentage by weight, 0.050%-0.100% of C, 0.10%-0.50% of Si, 1.10%-1.60% of Mn, 0.010%-0.030% of P, less than or equal to 0.005% of S, 0.30%-0.50% of Cu, 0.40%-0. 90% of Ni, 0.40%-0.80% of Cr, 0.010%-0.050% of Nb, 0.010%-0.060% of V, 0.007%-0.030% of Ti, 0.03%-0.08% of Sb, 0.0080%-0.0120% of N, 0.015%-0.030% of Als and the balance Fe and unavoidable impurities. The high-strength corrosion-resistant flat-bulb steel is reasonable in chemical components and process design, and finished products have excellent mechanical property and corrosion resistance.

Description

technical field [0001] The invention relates to the technical field of flat bulb steel production, in particular to a high-strength corrosion-resistant flat bulb steel and a production method thereof. Background technique [0002] Bulb flat steel is a special type of steel, which is mainly used in the field of shipbuilding and bridge construction. It is mainly used as stiffener and anti-flex material. At present, most of the high-strength flat bulb steels used in ships are traditional AH32, AH36 and other grades with poor corrosion resistance. For this type of steel, protective methods such as coatings or corrosion inhibitors are mainly used for corrosion protection. According to Depending on the coating material, the coating life is generally 10-15 years, while the design service life of the hull is generally about 25 years. There is an obvious mismatch between the two, and it is easy to be damaged during service, especially when subjected to acid Pitting corrosion will o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/04C22C38/58C22C38/06C22C38/42C22C38/46C22C38/48C22C38/50C22C38/60C21D8/00C22C33/04B21C37/00
CPCB21C37/00C21D8/005C22C33/04C22C38/001C22C38/04C22C38/06C22C38/42C22C38/46C22C38/48C22C38/50C22C38/58C22C38/60
Inventor 李广龙丁宁李文斌方志刚严玲张锐赵坦张鹏刘宏李哲
Owner ANGANG STEEL CO LTD
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