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V and Cr containing microalloy building steel wire rod and production method thereof

A production method and microalloying technology, applied in the field of iron and steel metallurgy, can solve the problems of few types and low nitrogen content of vanadium nitride alloys, and achieve the effects of low cost, high nitrogen yield and high strength

Inactive Publication Date: 2018-03-20
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 and Cr containing microalloy building steel wire rod and production method thereof
  • V and Cr containing microalloy building steel wire rod and production method thereof
  • V and Cr containing microalloy building steel wire rod and production method thereof

Examples

Experimental program
Comparison scheme
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 (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, 0.020% P, and 0.025% S, the temperature is 1655°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 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 0.15% C, 0.016% P, and 0.020% S, the temperature is 1685°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 blow oxygen to remove C. When the composition of the molten steel is initially smelted to 0.10% C, 0.025% P, and 0.020% S, the temperature is 1686°C...

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Abstract

The invention belongs to the field of ferrous metallurgy, and particularly relates to a V and Cr containing microalloy building steel wire rod and a production method thereof. The V and Cr containingmicroalloy building steel wire rod and the production method thereof are provided according to the problems that vanadium nitride alloys selected for preparing nitrogen containing alloy steel in the prior art are low in nitrogen content, few in kind and the like. The steel wire rod comprises, by weight percent, 0.15%-0.30% of C, 0.30%-1.00% of Si, 0.60%-1.30% of Mn, 0.0060%-0.0180% of N, not larger than 0.040% of P, not larger than 0.040% of S, 0.010%-0.160% of V, 0.10%-0.60% of Cr and the balance Fe and inevitable impurities. The preparation method of the steel wire rod is characterized in that an N containing cored wire is fed into a furnace rear small platform, and N is adjusted to the proper level. The method is simple in operation, the nitrogen yield is high and stable, the productioncost can be effectively reduced, and the method is worthy 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 and Cr microalloy construction steel wire 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 improv...

Claims

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Application Information

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