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Microalloyed building steel wire rod containing V and production method thereof

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

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 (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.

[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 steel scrap are initially smelted into molten steel by using the function of the converter to blow oxygen and remove C. When the composition of the molten steel is initially smelted to 0.06% C, 0.020% P, and 0.023% S, the temperature is 1660°...

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 (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.

[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 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, 0.016% P, and 0.019% S, the temperature is 1655°C...

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 (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.

[0067]First, 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 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 0.10% C, 0.018% P, and 0.021% S, the temperature is 1685°C W...

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Abstract

The invention belongs to the field of iron and steel metallurgy, and particularly relates to a microalloyed building steel wire rod containing V and a production method thereof. The microalloyed building steel wire rod containing V and the production method of the microalloyed building steel wire rod aim to solve the problems that the nitrogen content of an existing vanadium nitride alloy which isselected and used for preparing nitrogen-containing alloy steel is low, and the variety is small. The composition of the steel wire rod comprises, 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, 0.010-0.160% of V and the balance being Fe and unavoidable impurities. The key point of the preparation method of the microalloyed building steel wire rod lies in that a cored wire containing N is fed into a small platform behind a furnace, and the content of N is adjusted to be at an appropriate level. Accordingto the production method of the microalloyed building steel wire rod, operation is simple, the nitrogen yielding rate is high and stable, the production cost can further be effectively reduced, and the production method is worth being applied and popularized.

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 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 im...

Claims

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Application Information

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IPC IPC(8): C22C38/12C22C38/02C22C38/04C21D8/06
CPCC21D8/065C22C38/001C22C38/02C22C38/04C22C38/12Y02P10/20
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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