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Microalloy building steel wire rod containing V, Nb, Ti and Cr and production method of microalloy building steel wire rod

A production method and micro-alloy technology, which are applied to Ti, Nb, Cr micro-alloy construction steel wire rods and their production, and V-containing fields, can solve the problems of low nitrogen content and few types of vanadium nitride alloys, and achieve nitrogen yield. High efficiency, low cost, 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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  • Microalloy building steel wire rod containing V, Nb, Ti and Cr and production method of microalloy building steel wire rod
  • Microalloy building steel wire rod containing V, Nb, Ti and Cr and production method of microalloy building steel wire rod
  • Microalloy building steel wire rod containing V, Nb, Ti and Cr and production method of microalloy building steel wire rod

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Effect test

Embodiment 1

[0047] A steel plant adopts the technology of the present invention to produce belted 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 → high-speed wire rolling into Ribbed steel 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 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 0.06% C, 0.025% P, and 0.025% S, the temperature is 1653°C...

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 (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 → 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 0.15% C, 0.026% P, and 0.023% S, the temperature is 1690°C ...

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 (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 → 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 remove C by blowing oxygen. When the composition of the molten steel is initially smelted to 0.10% C, 0.015% P, and 0.023% S, the temperature is 169...

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Abstract

The invention belongs to the field of steel metallurgy and particularly relates to a microalloy building steel wire rod containing V, Nb, Ti and Cr and a production method of the microalloy building steel wire rod. The microalloy building steel wire rod containing V, Nb, Ti and Cr and the production method of the 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%-0.080% of V, 0.010%-0.030% of Nb, 0.010%-0.030% of Ti, 0.10%-0.60% of Cr and the balance Fe and inevitable impurities. The preparing method of the microalloy building steel wire rod containing V, Nb, Ti and Cr is characterized in that N-containing core spun yarn is fed into a small platform behind a furnace, and N is adjusted to the proper level. 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 microalloy construction steel wire rod containing V, Nb, Ti and Cr 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 s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/24C22C38/26C22C38/28C21D8/06
CPCC22C38/02C21D8/065C22C38/001C22C38/04C22C38/24C22C38/26C22C38/28
Inventor 刘明邓通武雷秀华张颖刚
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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