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Hot-rolled steel bar

A technology of steel bars and specifications, applied in the field of alloy steel, can solve the problems of difficulty in meeting the safety and seismic performance of building structures, low mechanical properties of hot-rolled steel bars, and increasing the amount of steel used to increase safety reserves, enhance seismic performance, The effect of increasing structural strength

Inactive Publication Date: 2017-01-25
YUNNAN DESHENG STEEL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The technical problem to be solved and the technical task proposed by the present invention are to improve the existing technology and provide a hot-rolled steel bar to solve the problem that the traditional hot-rolled steel bar in the current technology has low mechanical properties and is difficult to meet the safety and earthquake resistance of building structures. Performance, the amount of steel must be increased, and the problem of high construction cost

Method used

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Embodiment Construction

[0016] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0017] The hot-rolled steel bar disclosed in the embodiment of the invention adjusts the composition ratio of the steel bar, effectively improves the mechanical properties of the steel bar, satisfies the safety and anti-seismic performance of the building structure, reduces the amount of steel used, and reduces the construction cost.

[0018] The composition ratio of the hot-rolled steel bars designed by the present application is shown in Table 1 and Table 2 by weight percent...

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Abstract

The invention discloses a hot-rolled steel bar. The hot-rolled steel bar is characterized by comprising, by weight, 0.20-0.24% of C, 0.44-0.55% of Si, 1.48-1.55% of Mn, 0.020-0.032% of Nb, P, S and the balance Fe and impurity elements, wherein the weight percentage of P is smaller than or equal to 0.040%, and the weight percentage of S is smaller than or equal to 0.040%. The diameter specification of the hot-rolled steel bar is 16-32mm. The hot-rolled steel bar has advantages that by adjustment of microalloy contents of the hot-rolled steel bar, safety and earthquake resistance of building structures can be met, mechanical properties, welding properties and anti-seismic properties can reach standards, the steel bar is high in strength, steel materials can be saved, construction cost is reduced, structural strength is improved, and safety storage quantity is increased.

Description

technical field [0001] The invention relates to the technical field of alloy steel, in particular to a hot-rolled steel bar. Background technique [0002] The alloy elements and content in steel affect the mechanical properties of steel, and the yield strength and strength-to-yield ratio of steel bars directly affect the safety and seismic performance of building structures. Therefore, the use of high-strength hot-rolled steel bars with good seismic performance in building structures has attracted increasing attention. At present, the yield strength level of commonly used hot-rolled steel bars for construction is only 400MPa, and the highest requirement for the strength-to-yield ratio, which is an important seismic performance index, can only reach ≥1.1. Due to the low yield strength and strength-to-yield ratio, to ensure the safety and seismic performance of the building structure, it is necessary to increase the density of the reinforcement or increase the specification o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/04C22C38/02C22C38/12C21D8/08
CPCC22C38/04C21D8/08C21D2211/005C21D2211/009C22C38/02C22C38/12
Inventor 张华陈云刘德斌陈劲松沈绍波肖必伟段建波
Owner YUNNAN DESHENG STEEL CO LTD
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