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A kind of high-strength toughness corrosion-resistant steel plate and its manufacturing method

A high-strength, toughness and corrosion-resistant technology, applied in the field of metal material manufacturing, can solve the problem of not being able to meet high-strength, high-toughness and corrosion resistance at the same time, and achieve the effect of improving business quality and comprehensive performance, improving purity and high efficiency

Inactive Publication Date: 2017-06-20
SHANDONG IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, some steel plates used in the marine environment can only meet their high strength or high toughness or certain corrosion resistance, but cannot meet high strength, high toughness, and good corrosion resistance at the same time, and cannot meet the use requirements in the marine environment.

Method used

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  • A kind of high-strength toughness corrosion-resistant steel plate and its manufacturing method
  • A kind of high-strength toughness corrosion-resistant steel plate and its manufacturing method
  • A kind of high-strength toughness corrosion-resistant steel plate and its manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1: The thickness of the produced steel plate is 10mm.

[0031] Desulfurization and dephosphorization of molten iron pretreatment, the sulfur content after treatment is 0.0028%, and the temperature of molten iron is 1262°C;

[0032] Converter smelting: the end point carbon content target is 0.07%, P: 0.005%, S: 0.005%. Tapping temperature is 1622°C; double slag blocking plugs and slag blocking rods are used for tapping; ferromolybdenum and electrolytic nickel are added to the converter along with scrap steel, and ferroalloy, lime, and fluorite are added during tapping to make top slag; silicomanganese is added in turn Alloy, ferro-silicon, ferro-aluminum-manganese, ferro-chromium and ferro-vanadium are alloyed, and the argon blowing time is 17 minutes during the tapping process;

[0033] LF refining: the arrival temperature is 1530°C, and the exit temperature is 1656°C. The heating time is 33 minutes, and the treatment cycle is 58 minutes.

[0034] RH refin...

Embodiment 2

[0043] Embodiment 2: The thickness of the steel plate involved in this embodiment is 30 mm.

[0044] Desulfurization and dephosphorization of molten iron pretreatment, the sulfur content after treatment is 0.0032%, and the temperature of molten iron is 1268°C;

[0045] Converter smelting: the end point carbon content target is 0.06%, P: 0.006%, S: 0.004%. The tapping temperature is 1625°C; the slag stopper and the slag stop rod are used to tap the slag; ferromolybdenum and electrolytic nickel are added to the converter along with the scrap steel, and ferroalmanganese, lime, and fluorite are added to form the top slag during tapping; silicon manganese is added in turn Alloy, ferro-silicon, ferro-aluminum-manganese, ferro-chromium, and ferro-vanadium are alloyed, and the argon blowing time is 19 minutes during the tapping process;

[0046] LF refining: arrival temperature 1535°C, exit temperature 1660°C. The heating time is 32min, and the treatment cycle is 56min.

[0047] RH...

Embodiment 3

[0055] Embodiment 3: The thickness of the steel plate involved in this embodiment is 58mm.

[0056] Desulfurization and dephosphorization of molten iron pretreatment, the sulfur content after treatment is 0.0019%, and the temperature of molten iron is 1310°C;

[0057] Converter smelting: the end point carbon content target is 0.07%, P: 0.006%, S: 0.0035%. The tapping temperature is 1632°C; the slag stopper and the slag bar are used to tap the slag; ferromolybdenum and electrolytic nickel are added to the converter along with the scrap steel, and ferroalmanganese, lime, and fluorite are added to form the top slag during tapping; silicon manganese is added in turn alloying, ferro-silicon, ferro-aluminium-manganese, ferro-chromium, and ferro-vanadium are alloyed, and the argon blowing time is 17 minutes during the tapping process;

[0058] LF refining: arrival temperature 1527°C, exit temperature 1661°C. The heating time is 34min, and the treatment cycle is 58min.

[0059] RH ...

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Abstract

The invention provides a technical scheme of a high strength-toughness corrosion-resisting steel plate and a manufacturing method thereof. The steel plate produced by using the manufacturing method comprises the following components in percentage by weight: 0.10 to 0.13 percent of carbon (C), 0.10 to 0.30 percent of silicon (Si), 0.25 to 0.40 percent of manganese (Mn), less than or equal to 0.015 percent of phosphorus (P), less than or equal to 0.010 percent of sulphur (S), 2.30 to 2.50 percent of nickel (Ni), 1.30 to 1.50 percent of chromium (Cr), 0.28 to 0.38 percent of molybdenum (Mo), 0.010 to 0.030 percent of vanadium (V), 0.0015 to 0.0045 percent of calcium (Ca), and the balance of iron and unavoidable impurities. The tensile strength reaches above 800MPa, the lateral absorbed-energy at the temperature of minus 70 DEG C is not less than 100J, the corrosion resistance is more than 2.35 times that of plain carbon steel, and the steel plate has good high strength-toughness and corrosion resistance and excellent welding property, and can be widely applied in ocean structures, devices and the like.

Description

technical field [0001] The invention belongs to the technical field of metal material manufacturing, and specifically relates to a high-strength toughness corrosion-resistant steel plate and a manufacturing method thereof. Background technique [0002] With the implementation of the marine strategy, more and more steel plates are used in the marine environment, because the marine environment contains chloride ions (Cl - ), severely corroding steel. The temperature changes greatly from the ocean atmosphere to the deep sea, requiring the steel plate to have good low temperature toughness. With the advancement of science and technology, the structures and equipment used in the marine environment have higher and higher strength requirements. At present, some steel plates used in the marine environment can only meet their high strength or high toughness or certain corrosion resistance, but cannot meet high strength, high toughness, and good corrosion resistance at the same time...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/46C22C33/04C21D8/02
Inventor 夏茂森宋振官蒋善玉王绍禄郭占武董连委崔艳玲张虎周波
Owner SHANDONG IRON & STEEL CO LTD