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V-containing microalloy building steel wire rod and LF furnace production method thereof

A production method and micro-alloy technology, applied in the field of iron and steel metallurgy, can solve the problems of less species and low nitrogen content in vanadium nitride alloys, and achieve the effects of low cost, high nitrogen yield and reduced production cost

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

[0046] 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 (actual steel output is within the range of 120-140 tons). The production process is converter smelting → blowing inert gas after the furnace → LF furnace Heating → 6-machine 6-strand billet continuous casting machine casting into 150mm×150mm billet → billet heating → high-speed wire rolling into Round bars.

[0047] 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 0.060%. 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. When the composition of the molten steel is initially smelted to 0.09% C, 0.021% P, and 0.025% S, the temperature is 1674°C When tapping...

Embodiment 2

[0056] 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 (actual steel output is within the range of 120-140 tons). The production process is converter smelting → blowing inert gas after the furnace → LF furnace Heating → 6-machine 6-strand billet continuous casting machine casting into 150mm×150mm billet → billet heating → high-speed wire rolling into Ribbed steel bars.

[0057] 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 0.060%. 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. When the composition of the molten steel is initially smelted to 0.12% C, 0.017% P, and 0.024% S, the temperature is 1681°C When ...

Embodiment 3

[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 (actual steel output is within the range of 120-140 tons). The production process is converter smelting → blowing inert gas after the furnace → LF furnace Heating → 6-machine 6-strand billet continuous casting machine casting into 150mm×150mm billet → billet heating → high-speed wire rolling into 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 0.060%. 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 remove C. When the composition of the molten steel is initially smelted to 0.11% C, 0.020% P, and 0.025% S, the temperature is 1682°C When t...

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Abstract

The invention belongs to the field of steel metallurgy and particularly relates to a V-containing microalloy building steel wire rod and an LF furnace production method of the V-containing microalloybuilding steel wire rod. The V-containing microalloy building steel wire rod and the LF furnace production method of the V-containing microalloy building steel wire rod are provided for solving the problems that vanadium nitride alloys are adopted for preparing nitrogen-containing alloy steel at present, the nitrogen content is low, and kinds are few. The steel wire rod includes, 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, smaller than or equal to 0.040% of P, smaller than or equal to 0.040% of S, 0.010%-0.160% of V and the balance Fe and inevitableimpurities. The preparing method of the V-containing microalloy building steel wire rod is characterized in that N-containing core spun yarn is fed into a LF furnace, and N is adjusted to the properlevel. The method is easy to operate, the nitrogen yield is high and stable, the production cost can also be effectively reduced, and the method is worthy of application and popularization.

Description

technical field [0001] The invention belongs to the field of iron and steel metallurgy, and in particular relates to a V-containing microalloy construction steel wire rod and a production method for the LF furnace. 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 signi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/00C21D8/06C22C38/02C22C38/04C22C38/12
CPCC22C38/12C21C7/0056C21D8/065C22C38/001C22C38/02C22C38/04
Inventor 刘明邓通武雷秀华王西江
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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