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V, Nb and Cr contained microalloy building steel wire rod and LF production method thereof

A production method and microalloying technology, 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, low cost, and stable nitrogen yield

Inactive Publication Date: 2018-04-24
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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  • V, Nb and Cr contained microalloy building steel wire rod and LF production method thereof
  • V, Nb and Cr contained microalloy building steel wire rod and LF production method thereof
  • V, Nb and Cr contained microalloy building steel wire rod and LF production method thereof

Examples

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Effect test

Embodiment 1

[0047] 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.

[0048] 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 0.026% S, the temperature is 1674°C When tapping...

Embodiment 2

[0061] 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.

[0062]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, 0.021% P, and 0.029% S, the temperature is 1672°C When t...

Embodiment 3

[0075] 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.

[0076] 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 0.14% C, 0.020% P, and 0.021% S, the temperature is 1675°C When ...

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Abstract

The invention belongs to the field of ferrous metallurgy, and particularly relates to a V, Nb and Cr contained microalloy building steel wire rod and an LF production method thereof. In order to solvethe problems that an existing vanadium nitride alloy for preparing nitrogen containing alloyed steel is low in nitrogen content and little in kind, the invention provides the V, Nb and Cr contained microalloy building steel wire rod and the LF production method therefore. The steel wire rod comprises, by weight percent, 0.15 to 0.30% of C, 0.30 to 1.00% of Si, 0.60 to 1.30% of Mn, 0.0060 to 0.0180% of N, not larger than 0.040% of P, not larger than 0.040% of S, 0.010 to 0.100% of V, 0.010 to 0.030% of Nb, 0.10 to 0.60% of Cr and the balance Fe and inevitable impurities. The preparing method is characterized in that an N contained cored wire is fed into an LF, and the N is adjusted to the proper level. The method is easy to operate, the nitrogen yield is high and stable, production cost can be effectively reduced, and the steel wire rod is worth of use and popularization.

Description

technical field [0001] The invention belongs to the field of iron and steel metallurgy, and in particular relates to a V, Nb, Cr micro-alloyed construction steel wire rod and an LF furnace 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 sign...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/04C22C38/02C22C38/24C22C38/26C21D8/06C21D8/08C21C7/00C22C33/06
CPCC22C38/04C21C7/0056C21D8/065C21D8/08C21D2211/005C21D2211/009C22C33/06C22C38/001C22C38/02C22C38/24C22C38/26
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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