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A kind of production method of ultra-thin sa738gr B steel plate

A production method and technology for steel plates, which are applied in the production field of ultra-thin SA738Gr B steel plates, can solve the problems of difficult production, difficult plate shape, and unqualified performance.

Active Publication Date: 2017-09-29
ANGANG STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the thickness specifications of SA738Gr B steel for nuclear power produced at home and abroad are mostly greater than 20mm, but the production is very difficult if the thickness is less than 20mm, and the shape and performance of the plate are not easy to pass

Method used

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  • A kind of production method of ultra-thin sa738gr B steel plate

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Embodiment

[0017] The main elements of the steel plate include C0.15%~0.15%, Si0.2%~0.3%, Mn1.2%~1.5%, Cr≤0.4%, V≤0.015%, and the rest are Fe and unavoidable impurities, including the following step:

[0018] 1) Blanking: the 300mm billet is opened under high temperature and high pressure to a thickness of 100mm, the rolling temperature is 1200°C, 10%≤reduction rate≤25%;

[0019] 2) Rolling: 100mm intermediate billet is heated again, the rolling start temperature must be ≥1000°C, 10%≤reduction rate≤25%;

[0020] 3) Heat treatment: Quenching and tempering is adopted, the quenching and holding temperature is 920°C, the total time in the furnace is 2min / mm, the tempering holding time is 600°C, and the total time in the furnace is 5min / mm;

[0021] Through this production method, the SA738Gr B steel plate with the thinnest thickness of 10mm is produced, and the performance of the steel plate also meets the performance standards. The specific performance is as follows:

[0022]

[0023] ...

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Abstract

The invention relates to a production method of ultra-thin SA738Gr B steel plate, the steel plate contains C0.1%-0.2%, Si0.15%-0.37%, Mn1.0%-1.7%, Cr≤0.5%, V≤ 0.02%, the rest is Fe and unavoidable impurities; including the following process steps: 1) Billet cutting: the 300mm billet is opened under high temperature and high pressure to a thickness of 100-130mm, the rolling temperature is 1200±30°C, 10%≤pressing Reduction rate ≤ 30%; 2) Rolling: reheating, rolling start temperature ≥ 1000 ℃, 10% ≤ reduction rate ≤ 30%; 3) Heat treatment: quenching and tempering treatment. The invention has the advantages that: through this production method, the SA738Gr B steel plate with the thinnest thickness of 10mm is produced, and the performance of the steel plate also meets the performance standard.

Description

technical field [0001] The invention relates to a production method of ultra-thin SA738Gr B steel plate. Background technique [0002] SA738Gr B steel plate is a carbon-manganese-silicon steel plate for medium and low temperature. It is often used in nuclear power projects. It has high yield and tensile strength. The yield and tensile strength are generally ≥415Mpa, and the tensile strength is 585-700Mpa. The low-temperature impact below -18°C is assessed. , Modulated delivery. At present, the thickness specifications of SA738Gr B steel for nuclear power produced at home and abroad are mostly greater than 20mm, but the production is very difficult if the thickness is less than 20mm, and the plate shape and performance are not easy to pass. Contents of the invention [0003] In order to overcome the deficiencies in the prior art, the object of the present invention is to provide a production method of ultra-thin SA738Gr B steel plate, which can produce SA738Gr B steel plat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/38C22C38/24C22C38/18C22C38/12C22C38/04C21D8/02
Inventor 罗志华乔馨李新玲李靖年刘浩岩张坤王动
Owner ANGANG STEEL CO LTD
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