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Tempering type high-strength steel plate for low-temperature container and production method for tempering type high-strength steel plate

A low-temperature container and production method technology, applied in the field of metallurgy, can solve problems such as high cost, poor steel plate performance, and unsatisfactory use effect, and achieve low production cost, good comprehensive mechanical properties and welding performance, and strong market competitiveness. Effect

Inactive Publication Date: 2016-08-31
WUYANG IRON & STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, domestic production of such high-strength, high-demand quenched and tempered steel plates for low-temperature containers has poor performance, unsatisfactory use effects, and high production costs, which cannot meet the growing market demand.

Method used

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  • Tempering type high-strength steel plate for low-temperature container and production method for tempering type high-strength steel plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The thickness of the tempered high-strength steel plate for low-temperature containers in this embodiment is 10 mm, and it is formed by melting the following components by mass percentage:

[0030] C: 0.05%, Si: 0.20%, Mn: 1.50%, P: 0.010%, S: 0.005%, Alt: 0.020%, Ni: 0.30%, Mo: 0.15%, Nb: 0.016%, the balance is Fe and Trace unavoidable impurities. Crack sensitivity index Pcm: 0.158%, carbon equivalent Ceq: 0.378%.

[0031] The production method of the quenched and tempered high-strength low-temperature container steel plate of the present embodiment, the specific steps are:

[0032] (1) Smelting: The molten steel containing the above-mentioned chemical components in each weight percentage is first smelted in a converter, and then sent to an LF refining furnace for refining, fed with an Al wire of 200m, and the refining process ensures that the refining slag is white to ensure the deoxidation effect; the refining is completed Vacuum treatment in the VD furnace of the ...

Embodiment 2

[0041] The quenched and tempered steel plate for high-strength low-temperature containers in this embodiment has a thickness of 26 mm, and is formed by melting the following components by mass percentage:

[0042] C: 0.06%, Si: 0.24%, Mn: 1.60%, P: 0.008%, S: 0.003%, Alt: 0.034%, Ni: 0.33%, Mo: 0.16%, Nb: 0.025%, the balance is Fe and Trace unavoidable impurities. Crack sensitivity index Pcm: 0.163%, carbon equivalent Ceq: 0.397%.

[0043] The production method of the quenched and tempered high-strength low-temperature container steel plate of the present embodiment, the specific steps are:

[0044] (1) Smelting: The molten steel containing the above-mentioned chemical components in each weight percentage is first smelted in a converter, and then sent to an LF refining furnace for refining, fed with an Al wire of 260m, and the refining process ensures that the refining slag is white to ensure the deoxidation effect; the refining is completed Vacuum treatment in the VD furnac...

Embodiment 3

[0053] The quenched and tempered steel plate for high-strength low-temperature containers in this embodiment has a thickness of 34 mm, and is formed by melting the following components by mass percentage:

[0054] C: 0.08%, Si: 0.45%, Mn: 1.51%, P: 0.007%, S: 0.004%, Alt: 0.050%, Ni: 0.45%, Mo: 0.24%, Nb: 0.025%, the balance is Fe and Trace unavoidable impurities. Crack sensitivity index Pcm: 0.187%, carbon equivalent Ceq: 0.428%.

[0055] The production method of the quenched and tempered high-strength low-temperature container steel plate of the present embodiment, the specific steps are:

[0056] (1) Smelting: The molten steel containing the above-mentioned chemical components in each weight percentage is first smelted in a converter, and then sent to an LF refining furnace for refining, fed with an Al wire of 300m, and the refining process ensures that the refining slag is white to ensure the deoxidation effect; the refining is completed Vacuum treatment in the VD furnac...

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Abstract

The invention discloses a tempering type high-strength steel plate for a low-temperature container and a production method for the tempering type high-strength steel plate. The steel plate is smelted from the following components in percentage by mass: 0.05-0.09% of C, 0.20%-0.50% of Si, 1.50%-1.60% of Mn, less than or equal to 0.010% of P, less than or equal to 0.005% of S, 0.020%-0.050% of Alt, 0.30%-0.60% of Ni, 0.15%-0.30% of Mo, 0.015%-0.025% of Nb, and the balance being Fe and inevitable impurities. According to tempering type high-strength steel plate for the low-temperature container and the production method for the tempering type high-strength steel plate disclosed by the invention, a uniform tempered sorbite+ferrite structure is obtained by adopting a production process with a reasonable component design, controlled rolling and controlled cooling as well as tempering thermal treatment, so that the good comprehensive mechanical property and the welding property of the steel plate are guaranteed, the production cost is low, the market competitiveness is strong, and the ever-growing market requirements are met.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a quenched and tempered steel plate for high-strength low-temperature containers and a production method thereof. Background technique [0002] At present, Q345R, 16MnDR, 12MnNiVR, 15MnNiDR, 15MnNiNbDR, 09MnNiDR, SA203E (08Ni3DR, 3.5Ni), SA516Gr70 and other low-temperature pressure vessel steel plates are widely used in the manufacture of low-temperature pressure vessels. In particular, 07MnNiMoDR ​​steel is used as a steel for liquefied petroleum gas (LPG) low-temperature storage tanks instead of imported materials. Because this type of low-carbon bainitic steel plate has simple process, energy saving, good strength and toughness, easy forming and excellent welding Performance and other advantages can greatly reduce the manufacturing cost of LPG cryogenic storage tanks, and the demand in the market is increasing, and it is widely used in the manufacture of liquefied petroleum...

Claims

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Application Information

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IPC IPC(8): C22C38/04C22C38/02C22C38/06C22C38/08C22C38/12C21D8/02
CPCC22C38/04C21D8/0226C21D8/0247C21D2211/005C22C38/02C22C38/06C22C38/08C22C38/12
Inventor 邓建军王晓书王青高雅张朋张海军张志军徐腾飞
Owner WUYANG IRON & STEEL
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