1000MPa grade low-crack hydroelectric steel plate for large-scale hydropower engineering and production method thereof

A technology of hydropower engineering and production methods, applied in the field of steel plate production, can solve problems such as difficulty in research and development

Inactive Publication Date: 2018-09-07
NANYANG HANYE SPECIAL STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The mechanical properties of the above-mentioned steel plates are required to have good low-temperature impact toughness, fracture toughness and good welding performance under high strength, which is extremely difficult to develop

Method used

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  • 1000MPa grade low-crack hydroelectric steel plate for large-scale hydropower engineering and production method thereof
  • 1000MPa grade low-crack hydroelectric steel plate for large-scale hydropower engineering and production method thereof
  • 1000MPa grade low-crack hydroelectric steel plate for large-scale hydropower engineering and production method thereof

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Embodiment Construction

[0013] The technical features of the present invention will be further described below in conjunction with the embodiments.

[0014] The embodiment of the present invention is to produce a 1000MPa grade low crack sensitivity steel hydroelectric steel plate for large-scale hydropower projects, the thickness of which is 10-50 mm, and the chemical composition includes the following mass percentages: C: 0.06-0.17%, Si: ≤0.15% , Mn: 0.8~2.0%, P: ≤0.010%, S: ≤0.003%, Ni: 1.0~2.0%, Cu: 0.10~0.25%, Cr: 0.3~1.5%, Mo: 0.4~0.7%, V+ Nb+Ti: ≤0.1%, Als: 0.015~0.045%, Ce≤0.020%, CEV≤0.64%, Pcm≤0.28%, others are Fe and residual elements.

[0015] The above-mentioned examples adopt converter smelting, water-cooled copper plate crystallizer ingot mold casting, 3800m wide and thick plate rolling mill, quenching and tempering to produce 1000MPa high-strength and low-crack-sensitivity steel hydropower steel. The specific process flow is: hot metal KR desulfurization →converter→LF refining→VD vacu...

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Abstract

The invention discloses a 1000MPa grade low-crack-sensitive steel hydroelectric steel plate for large-scale hydropower engineering, the 1000MPa grade low-crack sensitive steel hydroelectric steel plate has a thickness of 10 to 50 mm, and comprises the following chemical components by mass: 0.06-0.17% of C, <=0. 15% of Si, 0.8 to 2.0% of Mn, <= 0.010% of P, <= 0.003% of S, 1.0 to 2.0% of Ni, 0.10 to 0.25 % of Cu, 0.3 to 1.5% of Cr, 0.4 to 0.7% of Mo, <= 0.1% of V + Nb + Ti, 0.015 to 0.045% of Als, Ce <= 0.020% of, CEV <= 0.64% of, Pcm <= 0.28% of, and balance of Fe and residual elements. Compared with the prior art, the 1000MPa grade low-crack sensitive steel hydroelectric steel plate has the advantages of high strength, high toughness, low crack sensitivity, good surface quality, good weldability and the like.

Description

technical field [0001] The invention relates to the field of steel plate production, in particular to a 1000MPa grade low crack sensitivity steel hydropower steel plate for large hydropower projects and a production method thereof. Background technique [0002] With the development of hydropower stations in the direction of large-scale, hydropower steel penstocks for hydropower stations are gradually developing in the direction of high strength and reduced weight. Since 2000, 600MPa grade hydropower steel has been widely used in China. Starting from the Xiangjiaba Hydropower Station, 800MPa grade hydropower steel has been adopted in China. At present, 800MPa grade hydropower steel has been widely used in Baihetan, Wudongde and other hydropower stations. Large-scale hydropower stations have begun to use 1000MPa grade hydropower steel in the design process. Use requirements are put forward. Steel for penstocks and volute casings concentrates most or all of the water head of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/42C22C38/44C22C38/46C22C38/50C22C38/06C22C38/04C22C38/02C22C33/04C22C38/58C21D8/02
CPCC21D8/0205C22C33/04C22C38/005C22C38/02C22C38/04C22C38/06C22C38/42C22C38/44C22C38/46C22C38/50C22C38/58Y02P10/20
Inventor 张占杰朱书成许少普李忠波唐郑磊刘庆波杨阳杨东庞百鸣于飒董真真袁少威袁继恒符可义袁永旗王英杰薛艳生石教兴蒋鹏朱先兴
Owner NANYANG HANYE SPECIAL STEEL CO LTD
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