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80-120mm thick deep-sea submarine is easy to weld corrosion-resistant high-strength q690e steel plate and production method thereof

A technology of Q690E and production method, which is applied in the field of easy-to-weld corrosion-resistant high-strength Q690E steel plates, can solve the problems of not being suitable for deep-sea submarines, poor corrosion resistance of steel plates, etc., and achieve high fracture toughness, good surface quality, and high cleanliness of molten steel Effect

Active Publication Date: 2020-09-11
NANYANG HANYE SPECIAL STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, after testing, the steel plate produced by this invention has poor corrosion resistance and is not suitable for deep-sea submarine manufacturing.

Method used

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  • 80-120mm thick deep-sea submarine is easy to weld corrosion-resistant high-strength q690e steel plate and production method thereof
  • 80-120mm thick deep-sea submarine is easy to weld corrosion-resistant high-strength q690e steel plate and production method thereof
  • 80-120mm thick deep-sea submarine is easy to weld corrosion-resistant high-strength q690e steel plate and production method thereof

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Experimental program
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Effect test

Embodiment 1

[0045] The production method of the 80-120mm thick deep-sea submarine of the present embodiment is easy to weld the corrosion-resistant high-intensity Q690E steel plate, comprises the following steps: 1) converter smelting process: select the normal ladle that ladle age, ladle condition meet technological requirement for use, simultaneously clad edge must Clean; select furnace molten iron with desulfurization and low P to ensure that the tapping temperature is 1630°C, the tapping carbon C=0.04%, and the tapping P=0.002%. It is not allowed to blow argon during the tapping process, and it is not allowed to add any deoxidizer and alloy to the molten steel; at the end of tapping, the slag blocking cone is used to block the slag. If the slag blocking fails, the furnace must be lifted in advance to ensure that the thickness of the converter slag is controlled below 20mm To avoid slag returning to P; after the molten steel arrives at the argon station, it is forbidden to add alloys, a...

Embodiment 2

[0058] The production method of the 80-120mm thick deep-sea submarine of the present embodiment is easy to weld the corrosion-resistant high-intensity Q690E steel plate, comprises the following steps: 1) converter smelting process: select the normal ladle that ladle age, ladle condition meet technological requirement for use, simultaneously clad edge must Clean; select furnace molten iron with desulfurization and low P to ensure that the tapping temperature is 1630°C, the tapping carbon C=0.02%, and the tapping P=0.004%. It is not allowed to blow argon during the tapping process, and it is not allowed to add any deoxidizer and alloy to the molten steel; at the end of tapping, the slag blocking cone is used to block the slag. If the slag blocking fails, the furnace must be lifted in advance to ensure that the thickness of the converter slag is controlled below 20mm To avoid slag returning to P; after the molten steel arrives at the argon station, it is forbidden to add alloys, a...

Embodiment 3

[0071] The production method of the 80-120mm thick deep-sea submarine of the present embodiment is easy to weld the corrosion-resistant high-intensity Q690E steel plate, comprises the following steps: 1) converter smelting process: select the normal ladle that ladle age, ladle condition meet technological requirement for use, simultaneously clad edge must Clean; select furnace molten iron with desulfurization and low P to ensure that the tapping temperature is 1630°C, the tapping carbon C=0.03%, and the tapping P=0.005%. It is not allowed to blow argon during the tapping process, and it is not allowed to add any deoxidizer and alloy to the molten steel; at the end of tapping, the slag blocking cone is used to block the slag. If the slag blocking fails, the furnace must be lifted in advance to ensure that the thickness of the converter slag is controlled below 20mm To avoid slag returning to P; after the molten steel arrives at the argon station, it is forbidden to add alloys, a...

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Abstract

The invention discloses an easy-welding and corrosion-resisting high strength Q690E steel plate for an 80-120 mm thick deep sea submarine and a production method of the Q690E steel plate, and belongsto the technical field of production of plates of a moderate thicknesscut deals. The Q690E steel plate is prepared from the following chemical components in percentage by mass: smaller than or equal to 0.06 percent of C, smaller than or equal to 0.40 percent of Si, 0.7 to 1.1 percent of Mn, smaller than or equal to 0.010 percent of P, smaller than or equal to 0.003 percent of S, 3.35 to 3.65 percent of Ni, 1.17 to 1.75 percent of Cu, 0.40 to 0.8 percent of Cr, 0.5 to 0.7 percent of Mo, smaller than or equal to 0.1 percent of V plus Nb plus Ti, 0.0008 to 0.002 percent of B, 0.015 to 0.045 percent of Als and the balance of Fe and residual elements. The steel plate prepared by the production method disclosed by the invention has the characteristics of easy welding, corrosion resistance, highstrength, high toughness and good surface quality.

Description

technical field [0001] The invention relates to the technical field of medium and heavy plate production, in particular to an easy-to-weld, corrosion-resistant, high-strength Q690E steel plate for deep-sea submarines with a thickness of 80-120 mm and a production method thereof. Background technique [0002] One of the most important development trends of submarine steel is to continuously improve the strength of materials. Traditional high-strength submarine steel is designed with low-carbon and low-alloy steel components and obtained low-carbon tempered martensitic structure through quenching and tempering treatment. , so as to ensure that the steel plate has high strength and good low-temperature impact toughness to meet the requirements of strength and toughness matching. In order to ensure good hardenability of thicker gauge steel plates, more alloying elements such as Ni, Cr, Mo, V, B, etc. need to be added to the steel. The higher the strength level of the steel, the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/42C22C38/44C22C38/46C22C38/48C22C38/50C22C38/54C22C38/06C21C7/10C21C7/068C21C7/06C21D8/02C21D1/18
CPCC21C7/0056C21C7/06C21C7/068C21C7/10C21D1/18C21D8/0226C21D8/0263C21D2211/002C21D2211/005C22C38/02C22C38/04C22C38/06C22C38/42C22C38/44C22C38/46C22C38/48C22C38/50C22C38/54Y02P10/20
Inventor 朱书成张占杰许少普李忠波张涛刘庆波杨阳唐郑磊康文举李亮董真真蒋鹏薛艳生符可义王英杰袁永旗袁继恒于飒庞百鸣郑海明陈良全微波朱先兴袁高俭杨春王勇赵运启白艺博李嘎子
Owner NANYANG HANYE SPECIAL STEEL CO LTD
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