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High-strength high-toughness steel plate and preparation method thereof

A high-strength and toughness, steel plate technology, applied in the fields of alloy steel and its steelmaking, steel rolling and heat treatment, can solve the problems of no rolling process, no operability, etc. Short, the effect of increasing the yield strength

Inactive Publication Date: 2015-08-19
武钢集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The chemical composition provided by this method is too broad to be operable, and the invention does not provide a specific rolling process

Method used

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  • High-strength high-toughness steel plate and preparation method thereof
  • High-strength high-toughness steel plate and preparation method thereof
  • High-strength high-toughness steel plate and preparation method thereof

Examples

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Embodiment Construction

[0054] The implementation of the present invention will be described in detail below in conjunction with the examples, but they do not constitute a limitation of the present invention, and are only examples. At the same time, the advantages of the present invention will become clearer and easier to understand.

[0055] The high-strength toughness steel plate of the present invention includes 5 sets of examples and 2 sets of comparative examples. The specific chemical components and weight percentages of the steel in the examples and comparative examples are shown in Table 1.

[0056] Table 1 The chemical composition (wt %) of each embodiment of the present invention and comparative example

[0057]

[0058] A method for preparing a high-strength toughness steel plate, comprising the steps of:

[0059] 1) Converter smelting and continuous casting into billets with a thickness of 200-300 mm;

[0060] 2) heating the slab obtained in step 1) to 1150-1200°C;

[0061] 3) rough...

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Abstract

The invention discloses a high-strength high-toughness steel plate. The steel comprises the following chemical components in percentage by weight: 0.032-0.11% of C, 0.10-0.26% of Si, 1.51-1.80% of Mn, 0.03-0.06% of Nb, 0.012-0.020% of Ti, at most 0.052% of V, at most 0.20% of Mo, at most 0.40% of Ni, at most 0.30% of Cr, at most 0.15% of Cu, at most 0.018% of P, at most 0.0020% of S, and the balance of Fe and inevitable impurities. The invention also discloses a preparation method of the high-strength high-toughness steel plate, which comprises the following steps: 1) blank casting; 2) heating; 3) rolling; 4) cooling; 5) heat treatment; and 6) air cooling. The method has the advantages of simple hot rolling technique, low heat treatment temperature, short holding time, low energy consumption and lower production cost, obtains the product with higher quality, and enhances the yield.

Description

technical field [0001] The invention relates to alloy steel and its steelmaking, steel rolling and heat treatment technologies, in particular to a high-strength toughness steel plate and its preparation method. Background technique [0002] The development of material property control technology is a process of continuously improving the strength and toughness of steel plates. In the past, high strength and high toughness of steel plates were achieved through alloying and heat treatment. However, alloying will bring a series of problems such as high production cost and poor welding performance, so that the thickness and toughness of the plate are limited. Since the 1960s, the Controlled Rolling Technology (CR), which uses controlled rolling temperature to refine grains, has been established. This technology has played a great role in reducing alloys and improving the welding performance of steel plates. [0003] At lower temperatures, the use of CR technology can obtain hi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/58C22C38/38C22C38/16C22C38/14C22C33/04C21D8/02
Inventor 李银华董汉雄王世森徐进桥卜勇洪君余宏伟李德发梁宝珠易勋王孝东陈勇刘孟启饶水林
Owner 武钢集团有限公司
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