High-strength steel bar and method for controlling power strength of concrete civil defense structure through high-strength steel bars

A high-strength steel bar and dynamic strength technology, which is applied in the field of high-strength steel bars and their control of the dynamic strength of concrete civil air defense structures, can solve the problems of high cost, unstable rolling quality, and high-strength steel bars whose yield strength cannot reach 600MPa and above. Effect of improving yield strength and tensile strength without reducing plasticity
CN105088098AInactive Publication Date: 2015-11-25TIANSHUN GROUP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
TIANSHUN GROUP
Publication Date
2015-11-25
Estimated Expiration
Not applicable · inactive patent
Patent Text Reader

Abstract

The invention relates to a high-strength steel bar. The high-strength steel bar comprises, by weight, 0.19-0.29% of C, 0.45-0.85% of Si, 1.25-1.75% of Mn, 0.08-0.28% of combined elements including V, Ti and Nb, 0.01-0.07% of Cr, 0.01-0.07% of Ni, 0-0.05% of Cu, 0-0.01% of Mo, 0.025% of P or less, 0.025% of S or less, 0.01-0.15% of N and the balance Fe and unavoidable impurities. The yield strength and tensile strength of the high-strength steel bar can be improved, the plasticity is not lowered, and the yield strength can reach 600 MPa or higher. The high-strength steel bars are applied to a civil defense structure, the power strength value of the civil defense structure is set as the product of the tensile strength value of the high-strength steel bars and the steel bar strength comprehensive adjustment coefficient, and the steel bar strength comprehensive adjustment coefficient is 1.05-1.1.
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Description

technical field

[0001] The invention relates to a steel bar and a production process thereof, in particular to a high-strength steel bar and a method for controlling the dynamic strength of a concrete civil air defense structure. Background technique

[0002] High-strength steel bars refer to steel for reinforced concrete and prestressed reinforced concrete, whose cross-section is circular, sometimes square with rounded corners. Including plain round bars, ribbed bars, twisted bars. In the prior art, steel bars are classified into grade I reinforcement (grade 235 / 370) according to mechanical properties; grade II reinforcement (grade 335 / 510); grade III reinforcement (370 / 570) and grade IV reinforcement (540 / 835). The latter two types of steel bars are high-strength steel bars.

[0003] Common types of high-strength steel bars are as follows:

[0004] (1) Micro-alloyed hot-rolled ribbed steel bar: hot-rolled ribbed steel bar with improved yield strength and ultimate streng...

Claims

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