HRB600E aseismic reinforcement steel bar and production method thereof

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...

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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

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