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A kind of HRB500E anti-seismic steel bar and preparation method thereof

A technology of anti-seismic steel bars and steel bars, which is applied in the field of building materials, can solve the problems of high cost of strain aging of anti-seismic steel bars, achieve the effects of optimizing rolling process and controlled rolling and controlled cooling technology, saving alloys, good metallographic structure and grain size

Active Publication Date: 2017-02-01
福建三宝钢铁有限公司
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  • Abstract
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  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a HRB500E anti-seismic steel bar and its preparation method to solve the problems of high strength, high toughness, strain aging and high cost of the anti-seismic steel bar

Method used

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  • A kind of HRB500E anti-seismic steel bar and preparation method thereof
  • A kind of HRB500E anti-seismic steel bar and preparation method thereof
  • A kind of HRB500E anti-seismic steel bar and preparation method thereof

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Embodiment Construction

[0020] step:

[0021] (1) Steelmaking and refining process: hot charging of molten iron in an electric furnace is adopted, the proportion of molten iron and steel scrap is 50%, energized for melting, enhanced oxygen supply for decarburization, controlled slagging process, dephosphorization, and removal of harmful impurities in steel to achieve output Steel conditions (C: 0.08-0.12%; P 0.030%; molten steel temperature: 1630-1650°C), slag-free tapping at the eccentric furnace bottom, and alloying in the ladle. Control the timing of adding the composite deoxidizer and FeV alloy; enter the LF refining station, blow argon and stir, deoxidize, further remove the gas and inclusions in the steel, improve the cleanliness of the steel, and fine-tune the composition and temperature to achieve narrow composition control of molten steel And the precise control of superheat can meet the technical performance requirements of HRB500E high-strength seismic steel bars.

[0022] (2) Continuous ...

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Abstract

The invention discloses an HRB500E seismic steel bar and a preparation method thereof. The steel bar is composed of the following elements in percentage by weight: 0.20-0.25% of C, 0.40-0.65% of Si, 1.20-1.60% of Mn, not greater than 0.045% of P, not greater than 0.045% of S, and 0.050-0.110% of V. The method comprises the following steps: 1) steel-making and refining; 2) continuous casting; and 3) steel rolling. The steel bar disclosed by the invention is reasonable and economical in chemical ingredient design, and ensured to achieve the technical requirements of the national standard GB1499.2 seismic steel bars and assignment book regulations, and achieve the purpose of saving alloys.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a HRB500E anti-seismic steel bar and a preparation method thereof. Background technique [0002] Due to the frequent occurrence of earthquakes and the catastrophic consequences, the country pays close attention to the earthquake resistance of building steel bars. The Ministry of Construction proposes that major construction projects and high-rise residential buildings must use earthquake-resistant steel bars. At present, HRB400E is widely used in anti-seismic steel bars in my country. The research and development and production of HRB500E are still in the initial stage. The HRB500E high-strength anti-seismic steel bars produced by the same type in China have a low pass rate, unstable performance, process stability needs to be studied, and no industrial production line has yet been formed. Contents of the invention [0003] The object of the present invention is to provide a HR...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/60C22C38/12C22C33/04
Inventor 林致明林军
Owner 福建三宝钢铁有限公司
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