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High-strength and high-toughness corrosion-resistant steel capable of being used in low-temperature environment of -60 DEG C, and production method thereof

A low-temperature environment, corrosion-resistant steel technology, used in high-strength, high-toughness corrosion-resistant steel and its production field, can solve the problems of high Ni and Cu content and high production costs, improve low-temperature impact toughness, and reduce ductile-brittle transition temperature. , the effect of reducing the source of corrosion

Active Publication Date: 2017-10-10
武汉钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The steel in this document is mainly used in marine climates with high temperature, high humidity and high salinity, not for low temperature and full immersion in seawater, and the content of Ni and Cu is high, and the production cost is high

Method used

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  • High-strength and high-toughness corrosion-resistant steel capable of being used in low-temperature environment of -60 DEG C, and production method thereof
  • High-strength and high-toughness corrosion-resistant steel capable of being used in low-temperature environment of -60 DEG C, and production method thereof
  • High-strength and high-toughness corrosion-resistant steel capable of being used in low-temperature environment of -60 DEG C, and production method thereof

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Embodiment Construction

[0030] The present invention will be described in further detail below in conjunction with specific embodiment, but this embodiment should not be construed as limiting the present invention:

[0031] Table 1 shows the chemical components and weight percentages of the various examples and comparative steels of the present invention.

[0032] The values ​​of main process parameters of each embodiment of the present invention and comparative steel are shown in Table 2.

[0033] The mechanical and corrosion resistance test results of the various embodiments of the present invention and comparative steels are shown in Table 3, wherein the corrosion resistance of the steels is comprehensively evaluated by simulating the mass loss after the corrosion of seawater solution by the cycle immersion corrosion test, and the test period is 240h.

[0034] Various embodiments of the present invention are carried out according to the following process steps:

[0035] 1) Carry out desulfurizati...

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Abstract

The invention relates to high-strength and high-toughness corrosion-resistant steel capable of being used in a low-temperature environment of -60 DEG C, and a production method thereof. The steel comprises the following components with contents in percentage by weight: 0.062%-0.115% of C, 0.22%-0.65% of Si, 0.82%-2.05% of Mn, not greater than 0.009% of P, not greater than 0.001% of S, 0.100%-0.280% of Als, 0.041%-0.080% of Nb, 0.090%-0.135% of Ti, 0.20%-0.40% of Ni and 0.40%-1.40% of Cr. The production method of the steel comprises the following production steps: molten iron desulphurization, converter smelting, common continuous casting and heating for a casting blank, three-phase rolling and cooling. With the adoption of the production method disclosed by the invention, the obtained steel has a yield strength of not less than 620MPa, impact toughness KV2 of not less than 100J and excellent seawater corrosion resistance, and can be used as steel for ships, and marine engineering and marine resource transportation equipment used in a low-temperature marine environment of -60 DEG C such as the north pole and having requirements on strength, low-temperature toughness, economical efficiency and use performance to a certain extent.

Description

technical field [0001] The invention relates to steel for ocean engineering and a production method thereof, in particular to a high-strength, high-toughness corrosion-resistant steel that can be used in a low-temperature environment of -60°C and a production method thereof. Background technique [0002] The Arctic is one of the focuses of competition among countries in the world. Taking the Arctic waterway can save a lot of ocean transportation resources, thus promoting the development of new concept ships such as Arctic shuttle tankers, icebreakers, and icebreaker container ships. New requirements include high strength, high toughness and seawater corrosion resistance in extremely cold environments. [0003] CN102586683B discloses a Ni-based low-temperature steel that can be used for liquefied natural gas storage tanks and hulls of transport ships. Its chemical composition by mass percentage is C: 0.02%-0.10%, Si: 0.01%-0.20%, Mn: 0.50%-0.75%, P≤0.010%, S≤0.004%, Ni: 8.50...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/58C22C38/02C22C38/04C22C38/06C22C38/48C22C38/50C21C1/02C22C33/04C21D8/02
CPCC21C1/02C21D8/0226C21D2211/002C22C33/04C22C38/02C22C38/04C22C38/06C22C38/48C22C38/50C22C38/58
Inventor 张开广陈颜堂范巍罗毅童明伟郭斌卜勇
Owner 武汉钢铁有限公司
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