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HRB600E aseismic reinforcement steel bar and production method thereof

The technology of an earthquake-resistant steel bar and a production method, which is applied in the field of steel bar and its production, can solve the problems of not being too much, waste of alloy elements, etc., and achieve the effects of low cost, stable performance and lower production cost.

Active Publication Date: 2014-04-09
LAIWU IRON & STEEL GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, most enterprises still produce HRB335E and HRB400E anti-seismic steel bars, and there are not many enterprises that can produce HRB500E. Up to now, no relevant reports about HRB600E high-strength anti-seismic steel bars have been found, only Chenggang and Jinan Iron and Steel Co., Ltd. The successful development of HRB600 was reported, and the content of microalloying element V in the development of HRB600 steel bar reached 0.17%~0.20%, which caused a serious waste of alloying elements. Therefore, it is necessary to study reasonable steel bar composition and suitable production process to produce Produce low-cost HRB600E high-strength seismic steel bars that meet performance requirements

Method used

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  • HRB600E aseismic reinforcement steel bar and production method thereof

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Experimental program
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Effect test

Embodiment 1

[0026] The method for producing the HRB600E seismic steel bar includes a steelmaking process, a continuous casting process and a steel rolling process. The specific steps of each process will be described below.

[0027] In the steelmaking process, the converter or electric furnace is used to smelt molten steel and alloy the ladle. When the molten steel is tapped to 1 / 5, silicon-manganese, ferrosilicon, vanadium-nitrogen alloy, silicon nitride, and silicon-manganese nitride are added in sequence, and all of them are added when the molten steel is tapped to 4 / 5, so that the N in the molten steel composition The content reaches 0.019%, and the V content reaches 0.105%. At the same time, the tapping temperature is controlled at 1635°C. The molten steel is then refined through an LF furnace.

[0028] In the continuous casting process, the billet is casted by a continuous casting machine to form a 150mm×150mm square billet, and the billet casting speed is 1.77m / s.

[0029] In th...

Embodiment 2

[0031] The method for producing the HRB600E seismic steel bar includes a steelmaking process, a continuous casting process and a steel rolling process. The specific steps of each process will be described below.

[0032] In the steelmaking process, the converter or electric furnace is used to smelt molten steel and alloy the ladle. When the molten steel is tapped to 1 / 5, silicon-manganese, ferrosilicon, vanadium-nitrogen alloy and silicon nitride are added in sequence, and all of them are added when the molten steel is tapped to 4 / 5, so that the N content in the molten steel composition reaches 0.021%. The V content reaches 0.095%. At the same time, the tapping temperature was controlled at 1630°C. The molten steel is then refined through an LF furnace.

[0033] In the continuous casting process, the billet is casted by a continuous casting machine to form a 150mm×150mm square billet, and the billet casting speed is 1.80m / s.

[0034] In the steel rolling process, the formed ...

Embodiment 3

[0036] The method for producing the HRB600E seismic steel bar includes a steelmaking process, a continuous casting process and a steel rolling process. The specific steps of each process will be described below.

[0037] In the steelmaking process, the converter or electric furnace is used to smelt molten steel and alloy the ladle. When the molten steel is tapped to 1 / 5, silicon-manganese, ferrosilicon, vanadium-nitrogen alloy and silicon nitride are added in sequence, and all of them are added when the molten steel is tapped to 4 / 5, so that the N content in the molten steel composition reaches 0.023%, The V content reaches 0.110%. At the same time, the tapping temperature was controlled at 1640°C. The molten steel is then refined through an LF furnace.

[0038] In the continuous casting process, the billet is casted by a continuous casting machine to form a 150mm×150mm square billet, and the billet casting speed is 1.79m / s.

[0039] In the steel rolling process, the forme...

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Abstract

The invention provides an HRB600E aseismic reinforcement steel bar and a production method thereof. The reinforcement steel bar consists of the following elements in percentage by weight: 0.17-0.25 percent of C, 0.40-0.80 percent of Si, 1.10-1.50 percent of Mn, 0.07-0.11 percent of V, less than or equal to 0.035 percent of P, less than or equal to 0.035 percent of S, 0.017-0.023 percent of N and the balance of Fe and inevitable impurities. The production method comprises a steelmaking procedure, a continuous casing procedure and a steel rolling procedure. In a primary smelting procedure of the steelmaking procedure, molten steel in a ladle is deoxidized and alloyed, so that the finally-obtained HRB600E high-strength aseismic reinforcement steel bar contains 0.07-0.11 percent by weight of V and 0.017-0.023 percent by weight of N. The reinforcement steel bar has high yield strength, high tensile strength, high ratio of tensile strength to yield point and high specific elongation, meets the requirement of the aseismic reinforcement steel bar, and is low in production cost.

Description

technical field [0001] The invention relates to a steel bar and a production method thereof, in particular to a HRB600E earthquake-resistant steel bar and a production method thereof. Background technique [0002] In recent years, with the frequent occurrence of earthquakes and other geological disasters, the construction industry has paid great attention to the anti-seismic steel bars. Improving the seismic performance of steel bars mainly focuses on the yield strength of steel bars (R el ), increasing the strength-to-yield ratio R m / R el , to increase the total elongation of the steel bar under the maximum external force. Stabilizing the yield strength of the steel bar and controlling it within a certain range can make all the stressed steel bars bear the force more evenly. If the performance of steel bars fluctuates widely in a certain part of the building structure, when the destructive force exceeds the allowable yield strength of the steel bars, but the steel bars...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/12
Inventor 刘艳林杜传治王淑华徐尚富
Owner LAIWU IRON & STEEL GRP