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B600B high-strength steel bar and production process thereof

A high-strength steel bar and production process technology, applied in the field of B600B high-strength steel bar and its production process, can solve the problems of high content and high cost, and achieve the effects of improving hardenability, avoiding waste, and facilitating market promotion

Inactive Publication Date: 2021-12-17
LIANFENG STEEL (ZHANGJIAGANG) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the B600B high-strength steel bars currently produced are mainly produced by high-microalloy + hot-rolling process. In this steel bar, V: 0.15-0.17%, Si: 0.65-0.80%, due to the high content of V and Si, the cost is high

Method used

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  • B600B high-strength steel bar and production process thereof
  • B600B high-strength steel bar and production process thereof
  • B600B high-strength steel bar and production process thereof

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Embodiment Construction

[0033] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but the protection scope of the present invention is not limited thereto.

[0034] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0035] In describing the present invention, it is to be understood that the terms "central", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "axial", The orientation or positional relationship indicated by "radial", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation o...

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Abstract

The invention provides a B600B high-strength steel bar and a production process thereof. The high-strength steel bar comprises the following chemical components in percentage: 0.17-0.22% of C, 1.00-1.20% of Mn, 0.40-0.55% of Si, 0.025-0.045% of V, less than or equal to 0.048% of P, less than or equal to 0.048% of S, 0.31-0.45% of Cr and the balance of Fe and inevitable impurities. The carbon equivalent Ceq of the high-strength steel bar is equal to 0.44-0.50%. The mechanical property Re of the high-strength steel bar is 625-780 MPa, the yield-strength ratio is larger than or equal to 1.08, and the Agt is larger than or equal to 5.0%. By controlling the contents of the elements C, Si, Mn, V and Cr, a smelted steel billet is rolled, and the high-strength steel bar meeting the mechanical property is obtained.

Description

technical field [0001] The invention relates to the field of metallurgy or the field of high-strength steel bars, in particular to a B600B high-strength steel bar and a production process thereof. Background technique [0002] Singapore standard B600B high-strength steel bars are widely used in various building structures, especially large, heavy, light thin-walled and high-rise building structures. Compared with 400MPa grade steel bars, the use of B600B grade and above high-strength steel bars can save more than 30% of steel consumption. Its development and application will also promote the promotion and application of high-performance energy-saving and environmentally friendly new materials, greatly improve the current structure of building products, and provide strong support for the realization of resource-saving and environment-friendly enterprises. [0003] However, the B600B high-strength steel bars currently produced are mainly produced by high-microalloy + hot-roll...

Claims

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Application Information

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IPC IPC(8): C22C38/04C22C38/02C22C38/24C22C38/60C21D8/08C21D1/18
CPCC22C38/04C22C38/02C22C38/24C22C38/60C21D8/08C21D1/18C21D2211/008
Inventor 马正洪黄沁黄剑王哲徐震石磊李孟雄郝开兴彭勇周聪
Owner LIANFENG STEEL (ZHANGJIAGANG) CO LTD