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Microalloy building steel bar containing V and Ti and production method thereof

A production method and technology for construction steel, applied in the field of iron and steel metallurgy, can solve the problems of low nitrogen content and few types of vanadium nitride alloys, and achieve the effects of high nitrogen yield, simple operation and stable nitrogen yield

Inactive Publication Date: 2018-03-02
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems of low nitrogen content and few types of vanadium nitride alloys used in the preparation of nitrogen-containing alloy steels, the present invention provides a new method for preparing nitrogen-containing alloys

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Embodiment 1 uses the inventive method to prepare containing V, Ti microalloy building steel bar

[0050] A steel plant adopts the technology of the present invention to produce ribbed steel bars for construction in the converter process with a nominal capacity of 120 tons (the actual steel output is in the range of 120 to 140 tons). The production process is converter smelting → blowing inert gas after the furnace + feeding Core-spun wire → 6-machine 6-strand billet continuous casting machine casting into 150mm×150mm billet → billet heating → rolling into continuous bar rolling production line Ribbed steel bars.

[0051] Firstly, 120 tons of molten iron and 20 tons of scrap steel are added into the converter, and the S content of the added molten iron is 0.051%. After the molten iron and steel scrap are added to the converter, the molten iron and scrap steel are initially smelted into molten steel by using the function of the converter to blow oxygen to remove C. Whe...

Embodiment 2

[0057] Embodiment 2 uses the inventive method to prepare containing V, Ti microalloy building steel bar

[0058] A steel plant adopts the technology of the present invention to produce ribbed steel bars for construction in the converter process with a nominal capacity of 120 tons (the actual steel output is in the range of 120 to 140 tons). The production process is converter smelting → blowing inert gas after the furnace + feeding Core-spun wire → 6-machine 6-strand billet continuous casting machine casting into 200mm×200mm billet → billet heating → rolling into continuous bar rolling production line Ribbed steel bars.

[0059] Firstly, 120 tons of molten iron and 20 tons of scrap steel are added into the converter, and the S content of the added molten iron is 0.047%. After the molten iron and steel scrap are added to the converter, the molten iron and steel scrap are initially smelted into molten steel by utilizing the function of the converter to remove C by blowing oxyg...

Embodiment 3

[0065] Embodiment 3 uses the inventive method to prepare containing V, Ti microalloy building steel bar

[0066] A steel plant adopts the technology of the present invention to produce ribbed steel bars for construction in the converter process with a nominal capacity of 120 tons (the actual steel output is in the range of 120 to 140 tons). The production process is converter smelting → blowing inert gas after the furnace + feeding Core-spun wire → 6-machine 6-strand billet continuous casting machine casting into 200mm×200mm billet → billet heating → rolling into continuous bar rolling production line Ribbed steel bars.

[0067] Firstly, 120 tons of molten iron and 20 tons of scrap steel are added into the converter, and the S content of the added molten iron is less than 0.055%. After the molten iron and steel scrap are added to the converter, the molten iron and steel scrap are initially smelted into molten steel by using the function of the converter to blow oxygen to rem...

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PUM

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Abstract

The invention belongs to the field of iron and steel metallurgy and particularly relates to a microalloy building steel bar containing V and Ti and a production method thereof. The microalloy buildingsteel bar containing V and Ti and the production method thereof are provided aiming at the problems of low nitrogen content, few types and the like of a vanadium nitride alloy which is adopted for preparing nitrogen-containing alloy steel in the prior art. The microalloy building steel bar comprises the components of, by weight, 0.15%-0.30% of C, 0.30%-1.00% of Si, 0.60%-1.30% of Mn, 0.0060%-0.0180% of N, no more than 0.040% of P, no more than 0.040% of S, 0.010%-0.100% of V, 0.010%-0.030% of Ti and the balance Fe and inevitable impurities. The key step of the preparation method of the microalloy building steel bar containing V and Ti is that N-containing cored wires are fed in a small platform behind a furnace, and the N content is adjusted to the appropriate level. The production methodis easy to operate, the nitrogen yield is high and stable, the production cost can be further reduced effectively, and thus the production method is worth applying and popularizing.

Description

technical field [0001] The invention belongs to the field of iron and steel metallurgy, and in particular relates to a V- and Ti-containing microalloy building steel rod and a production method thereof. Background technique [0002] Microalloyed steel mainly refers to the steel whose performance can be obviously improved by adding a small amount or a trace amount of certain elements in the steel, especially the strength index of the steel. Under the existing technical conditions, microalloyed steel is mainly obtained by adding a small amount or a small amount of vanadium, niobium and titanium. The mechanism of microalloying is: after adding vanadium, niobium and titanium as trace elements into molten steel, they combine with carbon and nitrogen in molten steel to form carbon and nitrogen compound particles, namely V(C, N), Nb( C, N) and Ti (C, N) particles, these particles have a certain effect of precipitation strengthening and grain refinement, which can significantly imp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/12C22C38/14C21D8/06
CPCC22C38/02C21D8/06C22C38/001C22C38/04C22C38/12C22C38/14
Inventor 邓通武刘明郭跃华冉准
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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