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HRB600E reinforcement steel bar and production method thereof

A production method and steel bar technology, applied in the field of HRB600E steel bar and its production, can solve the problems of waste of alloy elements, not too many, etc., and achieve the effects of low cost, reduced production cost, and high yield strength

Inactive Publication Date: 2013-01-02
LAIWU IRON & STEEL GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 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 reinforcement steel bar and production method thereof

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Effect test

Embodiment 1

[0029] The method for producing the HRB600E seismic steel bar includes a smelting process, a continuous casting process and a steel rolling process. The specific steps of each process will be described below.

[0030] In the smelting process, the converter or electric furnace is used to smelt molten steel and alloy the ladle. In the ladle alloying step, in addition to adding silicon-manganese and ferrosilicon alloys, ferrochromium alloys and vanadium-nitrogen alloys are also added, so that the Cr content in the molten steel composition reaches 0.032%, and the V content reaches 0.12%.

[0031] 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 2.1m / min.

[0032] In the steel rolling process, the billet is rolled at the start rolling temperature of 1070°C, and rolled at the finish rolling temperature of 860°C, and is naturally cooled on the cooling bed after rolling. The H...

Embodiment 2

[0034]The method for producing the HRB600E seismic steel bar includes a smelting process, a continuous casting process and a steel rolling process. The specific steps of each process will be described below.

[0035] In the smelting process, the converter or electric furnace is used to smelt molten steel and alloy the ladle. In the ladle alloying step, in addition to adding silicon-manganese and ferrosilicon alloys, ferrochrome and vanadium-nitrogen alloys are also added, so that the Cr content in the molten steel composition reaches 0.030%, and the V content reaches 0.11%. Afterwards, the molten steel is refined through the LF refining furnace and the VD vacuum degassing furnace in turn.

[0036] In the continuous casting process, the billet is casted by a continuous casting machine to form a 150 mm×150 mm square billet, and the billet casting speed is 2.0 m / min.

[0037] In the steel rolling process, the billet is rolled at the start rolling temperature of 1050°C, and roll...

Embodiment 3

[0039] The method for producing the HRB600E seismic steel bar includes a smelting process, a continuous casting process and a steel rolling process. The specific steps of each process will be described below.

[0040] In the smelting process, the converter or electric furnace is used to smelt molten steel and alloy the ladle. In the ladle alloying step, in addition to adding silicon-manganese and ferrosilicon alloys, ferrochromium alloys and vanadium-nitrogen alloys are also added, so that the Cr content in the molten steel composition reaches 0.028%, and the V content reaches 0.10%. Afterwards, the molten steel is refined through the LF refining furnace and the VD vacuum degassing furnace in turn.

[0041] In the continuous casting process, the billet is casted by a continuous casting machine to form a 150mm×150mm billet, and the billet casting speed is 2.1m / min.

[0042] In the steel rolling process, the billet is rolled at the start rolling temperature of 1030°C, and roll...

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Abstract

The invention discloses a HRB600E reinforcement steel bar and a production method thereof. The reinforcement steel bar consists of the following elements in percentage by weight: 0.20-0.28 percent of C, 1.30-1.60 percent of Mn, 0.30-0.80 percent of Si, 0.80-0.12 percent of V, less than or equal to 0.020 percent of S, less than or equal to 0.030 percent of P, 0.05-0.40 percent of Cr and the balance of Fe and inevitable impurities. The production method comprises a smelting procedure, a continuous casing procedure and a steel rolling procedure. In the smelting procedure, molten steel in a ladle is alloyed, so that the molten steel contains 0.08-0.12 percent by weight of V and 0.05-0.40 percent by weight of Cr. The vanadium content of the reinforcement steel bar is reduced by about 30-40 percent than the vanadium content of a reinforcement steel bar with the same level of yield strength, and the reinforcement steel bar has the advantages of high yield strength, high tensile strength, high yielding-to-tensile ratio, high specific elongation and the like.

Description

technical field [0001] The invention relates to a steel bar and a production method thereof, in particular to a HRB600E steel bar and a production method thereof. Background technique [0002] Hot-rolled ribbed steel bar is the main reinforcement material of reinforced concrete building structure, which bears the stress and strain of loads such as tensile and compressive stress and strain in the structure, especially with the development of national economy, high-rise, long-span, earthquake-resistant and low-temperature resistant The emergence of multifunctional building structures such as fire resistance and fire resistance requires steel bars to have higher strength, toughness and better welding performance. Due to the large amount of safe reserves of high-strength steel bars, good seismic performance, and saving steel consumption, it is a new type of building material that is more economical and efficient. In recent years, the country has actively advocated the construct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/38C22C38/24
Inventor 杜传治梁辉孙道清
Owner LAIWU IRON & STEEL GRP
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