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390MPa-grade high-strength IF steel and production method thereof

A production method and high-strength technology, applied in the field of steel manufacturing, can solve the problems of low plastic strain ratio r value, affecting the development of favorable textures, and large gap in performance indicators, so as to achieve the effect of improving the r value.

Active Publication Date: 2018-12-18
湖南华菱涟钢特种新材料有限公司 +1
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Problems solved by technology

However, the steel plate produced by this method has more FeTiP precipitates, which affects the development of favorable texture, resulting in a lower value of plastic strain ratio r. Compared with the product produced by continuous annealing furnace, the performance index of steel produced by this method is different. larger

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  • 390MPa-grade high-strength IF steel and production method thereof
  • 390MPa-grade high-strength IF steel and production method thereof
  • 390MPa-grade high-strength IF steel and production method thereof

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Embodiment Construction

[0023] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0024] The embodiment of the present invention discloses a 390MPa grade high-strength IF steel. By only adding micro-alloyed Nb elements, it can avoid a large amount of FeTiP precipitates in the steel from hindering the development of favorable textures, thereby increasing the plastic strain ratio r value.

[0025] The 390MPa high-strength IF steel disclosed in the embodiment of the present invention includes the following chemical components and weight percentages: C: 0.0-0.004%, Si: 0.0-0.030%, Mn: 0.4%-0.6%, P: 0.06%-0.085 %, S: 0.0-0.010%, Al: 0.03%-0.1%, Nb: 0.01%-0.1%, B: 0.00050%-0.0...

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Abstract

The invention belongs to the technical field of iron and steel manufacturing and particularly relates to 390MPa-grade high-strength IF steel. The 390MPa-grade high-strength IF steel comprises the following chemical components of, by weight, 0.0-0.004% of C, 0.0-0.030% of Si, 0.4-0.6% of Mn, 0.06-0.085% of P, 0.0-0.010% of S, 0.03-0.1% of Al, 0.01-0.1% of Nb, 0.00050-0.0012% of B, and the balance Fe and inevitable impurities. By means of the high-strength IF steel, the situation that development of a favorable texture is hindered as a large quantity of FeTiP precipitates of steel are separatedout can be avoided, and thus the value of the plastic strain ratio r is increased.

Description

technical field [0001] The invention belongs to the technical field of iron and steel manufacturing, and in particular relates to a 390MPa high-strength IF steel and a production method thereof. Background technique [0002] In the prior art, the 390MPa high-strength IF steel produced by a bell annealing furnace mainly achieves the purpose of product strength through the composite addition of micro-alloyed Nb and Ti. However, the steel plate produced by this method has more FeTiP precipitates, which affects the development of favorable texture, resulting in a lower value of plastic strain ratio r. Compared with the product produced by continuous annealing furnace, the performance index of steel produced by this method is different. larger. Contents of the invention [0003] The purpose of the present invention is to provide a 390MPa grade high-strength IF steel and its production method, which can avoid the large amount of FeTiP precipitates in the steel from hindering th...

Claims

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Application Information

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IPC IPC(8): C22C38/02C22C38/04C22C38/06C22C38/12C21D8/02C21D1/26
CPCC21D1/26C21D8/0226C21D8/0236C22C38/002C22C38/02C22C38/04C22C38/06C22C38/12
Inventor 刘景佳李光辉汪净张益龙田飞李晓少章晓辉张丽琴王自荣李雷陈佛望秦红云李瑾汪兆明
Owner 湖南华菱涟钢特种新材料有限公司
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