HRB600E ordinary-speed hot-rolled ribbed steel bar with tensile-to-yield ratio greater than 1.26

一种热轧带肋钢筋、强屈比的技术，应用在冶金领域

Active Publication Date: 2022-08-02
GUANGXI LIUGANG HUACHUANG TECH R & D CO LTD +1
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  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention provides a HRB600E normal-speed hot-rolled ribbed steel bar with a yield ratio greater than 1.26 and a production method thereof to solve the problem of the HRB600E ordinary hot-rolled ribbed steel bar with a yield ratio R° m / R° eL Questions below 1.25

Method used

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  • HRB600E ordinary-speed hot-rolled ribbed steel bar with tensile-to-yield ratio greater than 1.26
  • HRB600E ordinary-speed hot-rolled ribbed steel bar with tensile-to-yield ratio greater than 1.26
  • HRB600E ordinary-speed hot-rolled ribbed steel bar with tensile-to-yield ratio greater than 1.26

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Embodiment Construction

[0022] In order to have a clearer understanding of the technical features, objects and effects of the present invention, the present invention will now be described.

[0023] This application is suitable for ordinary bars, and the finish rolling speed is relatively slow. According to different specifications, the finish rolling speed (the exit speed of the finishing mill in hot tandem rolling) is only 1 / 3 to 1 / 2 of that of high-speed bars. At the same time, due to different production lines, more alloys must be added to achieve the same performance, and the specifications that can be produced are more than high-speed bars.

[0024] The principle of the invention is as follows: improving the hardenability of the steel in the composition design makes the CCT curve of the steel move to the right, and in the rolling process, the controlled rolling and controlled cooling process is used to refine the crystal grains and control the formation of the bainite structure. When producing ...

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Abstract

The invention provides an HRB600E ordinary-speed hot-rolled ribbed steel bar with the tensile-to-yield ratio larger than 1.26. A production method of the HRB600E ordinary-speed hot-rolled ribbed steel bar with the tensile-to-yield ratio larger than 1.26 comprises the following process stages which are conducted in sequence: blast furnace molten iron smelting, molten iron desulfurization pretreatment, converter molten steel smelting, LF refining, square billet continuous casting, hot continuous rolling, fixed-length shearing and inspection. The temperature control in the hot continuous rolling is as follows: the heating temperature of a casting blank is controlled to be 1150-1200 DEG C, the heating time of a steel billet is 60-90 minutes, and the initial rolling temperature is 1020-1080 DEG C. The production method is adopted for the ordinary-speed hot-rolled ribbed steel bar.

Description

[0001] The present invention is: application number: 2021106484681, name of invention: HRB600E general-speed hot-rolled ribbed steel bar with a strength-to-yield ratio greater than 1.26 and a production method thereof, application date: 2021-6-10, divisional application. technical field [0002] The invention relates to the field of metallurgy, in particular to a common-speed or common hot-rolled ribbed steel bar, in particular to a HRB600E common-speed hot-rolled ribbed steel bar with a strength-yield ratio greater than 1.26 and a production method thereof. Background technique [0003] China Iron and Steel Association Group Standard T / CISA 026—2020 "HRB600E Seismic Hot-Rolled Ribbed Steel Bars for Reinforced Concrete" for HRB600E Seismic Reinforcement R°m / R°e R°m / R°e L The requirement is greater than or equal to 1.25, but the normal production of HRB600E ordinary hot-rolled ribbed steel bar often has a strong yield ratio R° m / R° eL below 1.25. [0004] To sum up, the fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/12C21D8/08
CPCC22C38/02C22C38/04C22C38/12C22C38/002C21D8/08C21D2211/002C22C38/001Y02P10/20
Inventor 钱学海李宗强李西德陈学良文震何维肖娟蒙曰睿赵贤平廖耀俊温小园
Owner GUANGXI LIUGANG HUACHUANG TECH R & D CO LTD
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