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A steel plate for marine energy equipment and its preparation process

A steel plate and energy technology, applied in the steel plate of marine energy equipment and its preparation process, can solve the problems of uneconomical use of civil structural steel, no guarantee of seawater corrosion resistance, and influence of steel gas cutting performance, and achieve outstanding substantive features , good cutting performance, and the effect of ensuring the performance of the steel plate

Inactive Publication Date: 2016-06-08
JIGANG GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The purpose of this invention is to address the following problems often faced by marine energy equipment: (1) There is no guarantee of seawater corrosion resistance; (2) The composition design of high Si and high Al brings difficulties in continuous casting; (3) Low carbon, high Al The high Ni composition system is expensive and cannot be economically used in civil structural steel; (4) Adding a large amount of alloying elements has a great impact on the gas cutting performance of steel; the cutting performance cannot be guaranteed; (5) It is difficult to meet the requirements of downstream users Excellent low temperature toughness, easy welding, direct cutting requirements and other defects, and provide a steel plate for marine energy equipment and its preparation process, the steel plate for marine energy equipment has high resistance to atmospheric corrosion and seawater corrosion Performance; high strength and toughness; low carbon, easy to weld and continuous casting; good thermal cutting performance; low cost

Method used

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  • A steel plate for marine energy equipment and its preparation process
  • A steel plate for marine energy equipment and its preparation process
  • A steel plate for marine energy equipment and its preparation process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] The chemical composition content of the steel plate is by weight percentage:

[0059] C: 0.07%, Si: 0.15%, Mn: 1.22%, P: 0.012%, S: 0.003%, V: 0.053%, Ti: 0.017%, Al: 0.026%, Cu: 0.36%, Ni: 0.27%, Cr: 0.47%, Zr: 0.06%. Ceq: 0.35%, I: 6.34, the rest is Fe and unavoidable impurities.

[0060] The preparation process of the steel plate includes smelting-refining-continuous casting-rolling-direct quenching-tempering; after refining, 2.5kg / t of steel is added into FeSiZr30 alloy spheroidization, the feeding amount of pure calcium wire is 1.2m / t, soft blowing The argon time is 12 minutes; the two-stage controlled rolling process is rolled into a 10mm original plate. The final rolling temperature in the rough rolling stage is 1050°C; the final rolling temperature in the finish rolling stage is 880°C. After rolling, the steel plate quickly enters the Mulpic online cooling system and is directly quenched to 90°C, and then air-cooled to room temperature; the offline tempering t...

Embodiment 2

[0064] The chemical composition content of the steel plate is by weight percentage:

[0065] C: 0.09%, Si: 0.21%, Mn: 1.21%, P: 0.010%, S: 0.005%, V: 0.055%, Ti: 0.021%, Al: 0.032%, Cu: 0.39%, Ni: 0.33%, Cr: 0.61%, Zr: 0.11%. Ceq: 0.40%, I: 6.59. The rest is Fe and unavoidable impurities.

[0066] The preparation process of the steel plate includes smelting-refining-continuous casting-rolling-direct quenching-tempering; after refining, 4.4kg / t of steel is added into FeSiZr30 alloy spheroidization, the feeding amount of pure calcium wire is 1.2m / t, soft blowing The argon time is 10 minutes; the two-stage controlled rolling process is rolled into a 50mm original plate. The final rolling temperature in the rough rolling stage is 1030°C; the final rolling temperature in the finish rolling stage is 865°C. Fire time 150min.

[0067] The mechanical properties of the steel plate produced by embodiment 2 are as follows:

[0068] Specification: 50mm; Yield strength (MPa): 555; Ten...

Embodiment 3

[0070] The chemical composition content of the steel plate is by weight percentage:

[0071] C: 0.11%, Si: 0.24%, Mn: 1.29%, P: 0.013%, S: 0.007%, V: 0.055%, Ti: 0.025%, Al: 0.039%, Cu: 0.36%, Ni: 0.31%, Cr: 0.52%, Zr: 0.09%. Ceq: 0.42%, I: 6.59. The rest is Fe and unavoidable impurities.

[0072] The preparation process of the steel plate includes smelting-refining-continuous casting-rolling-direct quenching-tempering; after refining, 3.6kg / t of steel is added into FeSiZr30 alloy spheroidization, the feeding amount of pure calcium wire is 1.2m / t, soft blowing The argon time is 14 minutes; the two-stage controlled rolling process is rolled into an 80mm original plate. The final rolling temperature in the rough rolling stage is 1080°C; the final rolling temperature in the finish rolling stage is 860°C. Fire time 200min.

[0073] The mechanical properties of the steel plate produced by embodiment 3:

[0074] Specification: 80mm; yield strength (MPa): 535; tensile strength ...

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Abstract

The invention relates to a steel plate used for ocean energy equipment and a preparation process of the steel plate. The steel plate comprises the following chemical components in percentage by weight: 0.07-0.11% of carbon, 0.10-0.30% of silicon, 1.20-1.30% of manganese, less than or equal to 0.015% of phosphorus, less than or equal to 0.010% of sulfur, 0.05-0.08% of vanadium, 0.010-0.030% of titanium, 0.020-0.045% of aluminum, 0.35-0.45% of copper, 0.25-0.40% of nickel, 0.45-0.65% of chromium, 0.05-0.15% of zirconium, and the balance of iron and unavoidable impurities. The Ceq (carbon equivalent) is less than or equal to 0.45%, and the anti-corrosion factor (I) is more than or equal to 6.0. The steel plate produced by the preparation process disclosed by the invention has the yield strength of more than 500MPa, can endure a low temperature environment of 60 DEG C below zero, meets the requirements for 25-100kJ / cm of high welding heat input, is high in corrosion resistance which is 2.05 times that of a plain carbon steel, and is good in direct cutting performance in a normal temperature environment.

Description

technical field [0001] The invention belongs to the technical field of steel plates and their manufacture, and in particular relates to a steel plate for marine energy equipment and a preparation process thereof. Background technique [0002] Marine energy equipment mainly uses tides, ocean currents, waves and seawater temperature differences for energy development. Marine energy equipment is quite different from land environment. An important factor is that the marine environment corrodes equipment very seriously. Therefore, the steel used for marine energy equipment must meet the following requirements Two requirements: [0003] 1) Meet the service conditions [0004] Marine energy equipment components operate in fixed sea areas all year round and are surrounded by a saline atmosphere. Not only must they withstand the erosion and damage of natural forces such as waves, submarine earthquakes, and low temperatures, but they must also fully consider various harsh sea conditi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/50C22C33/04C21D8/02
Inventor 胡淑娥孙卫华刘晓东周兰聚侯东华刘强杨超
Owner JIGANG GRP
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