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HRB600E vanadium-containing high-strength hot-rolled earthquake-resistant reinforced bar and production method thereof

A technology of anti-seismic steel bars and production methods, applied in the field of metallurgy, to achieve the effects of improving strength, increasing safety reserves, plastic toughness and good anti-seismic performance

Active Publication Date: 2017-05-10
HEBEI IRON AND STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Under the background that the country vigorously advocates energy conservation, emission reduction and green environmental protection, the construction industry, which is a large resource consumer, cannot meet the needs of construction and development with ordinary strength steel bars as the main steel material for construction. It is necessary to develop low-cost high-performance steel bars and study their Engineering application has become an urgent problem to be solved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The chemical composition and percentage of HRB600E vanadium-containing high-strength hot-rolled anti-seismic steel bars are shown in Table 1, and the performance parameters are shown in Table 2.

[0033] The process flow is as follows:

[0034] (1) Smelting: Decarburization and dephosphorization of molten iron together with scrap steel and slagging materials, etc., the end point carbon is 0.10%, the end point phosphorus is 0.014%, the end point temperature is controlled at 1650°C, and ferromanganese nitride and silicon are added during the tapping process Iron, silicon-manganese alloy and vanadium-nitrogen alloy are alloyed with manganese, silicon and vanadium, and argon is blown and stirred throughout the tapping process.

[0035] (2) Refining outside the furnace: the molten steel in step (1) is sent to the LF furnace for refining, and the temperature and composition of the molten steel are finely controlled. The whole process of refining is argon blowing and stirring ...

Embodiment 2

[0040] The chemical composition and percentage of HRB600E vanadium-containing high-strength hot-rolled anti-seismic steel bars are shown in Table 1, and the performance parameters are shown in Table 2.

[0041] The process flow is as follows:

[0042] (1) Smelting: Decarburization and dephosphorization of molten iron together with scrap steel and slag forming materials, the end carbon is 0.08%, and the end point phosphorus is 0.08%. 0.018 %, the end point temperature is controlled at 1680°C, ferromanganese nitride, ferrosilicon, silicon-manganese alloy and vanadium-nitrogen alloy are added during the tapping process to alloy manganese, silicon and vanadium, and argon is blown and stirred throughout the tapping process.

[0043](2) Refining outside the furnace: the molten steel in step (1) is sent to the LF furnace for refining, and the temperature and composition of the molten steel are finely controlled. The whole process of refining is argon blowing and stirring at the botto...

Embodiment 3

[0048] The chemical composition and percentage of HRB600E vanadium-containing high-strength hot-rolled anti-seismic steel bars are shown in Table 1, and the performance parameters are shown in Table 2.

[0049] The process flow is as follows:

[0050] (1) Smelting: Decarburization and dephosphorization of molten iron together with scrap steel and slag-forming materials are carried out. The end point carbon is 0.14%, the end point phosphorus is 0.015%, and the end point temperature is controlled at 1670°C. Ferromanganese nitride and silicon are added during the tapping process. Iron, silicon-manganese alloy and vanadium-nitrogen alloy are alloyed with manganese, silicon and vanadium, and argon is blown and stirred throughout the tapping process.

[0051] (2) Refining outside the furnace: the molten steel in step (1) is sent to the LF furnace for refining, and the temperature and composition of the molten steel are finely controlled. The whole process of refining is argon blowin...

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Abstract

The invention discloses an HRB600E vanadium-containing high-strength hot-rolled earthquake-resistant reinforced bar and a production method thereof. The reinforced bar comprises the following chemical components in percentage by weight: 0.23-0.30% of C, 0.5-0.8% of Si, 1.20-1.60% of Mn, 0.15-0.20% of V, no more than 0.035% of P, no more than 0.030% of S, 0.015-0.025% of N and the balance of Fe and inevitable impurities. The production method comprises the following steps: performing converter or electric furnace smelting, performing external refining, performing continuous casting, heating a casting blank, rolling and performing air cooling on a cooling bed. According to the invention, the V and N contents in steel are controlled, thereby promoting formation and precipitation of V (C, N) fine particles; steel making and steel rolling process parameters are strictly controlled, thereby obviously enhancing the strength of the reinforced bar and having certain hydrogen corrosion resistance; indicators of the reinforced bar meets the requirements of an earthquake-resistant reinforced bar; and the reinforced bar has the practical meanings of energy saving, emission reduction, high safety and environment friendliness.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a HRB600E vanadium-containing high-strength hot-rolled anti-seismic steel bar and a production method. Background technique [0002] With the rapid development of the construction industry, engineering structures such as urban municipal engineering and high-rise buildings have higher and higher requirements for the performance of steel bars. The safety and earthquake resistance of building structures have attracted widespread attention. The key is to improve the strength and comprehensive performance of steel bars. Under the background that the country vigorously advocates energy conservation, emission reduction and green environmental protection, the construction industry, which is a large resource consumer, cannot meet the needs of construction and development with ordinary strength steel bars as the main steel material for construction. It is necessary to develo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/04C22C38/02C22C38/12C21D8/08
CPCC21D8/08C22C38/001C22C38/002C22C38/02C22C38/04C22C38/12
Inventor 靳刚强乔国平韩春良张俊粉翁玉娟马海峰
Owner HEBEI IRON AND STEEL
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