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Nb-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 stable nitrogen yield

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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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 steel scrap are added into the converter, and the S content of the added molten iron is 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 0.06% C, 0.020% P, and 0.025% S, the temperature is 1650°C When ...

Embodiment 2

[0057] 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.

[0058] 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 scrap steel 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, 0.015% P, and 0.019% S, the temperature is 1690°C ...

Embodiment 3

[0067] 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.

[0068]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 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 1685°C W...

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Abstract

The invention belongs to the field of ferrous metallurgy and particularly relates to a Nb-containing microalloy building steel wire rod and a production method thereof. Specific to the problems of lownitrogen content and less variety of the vanadium nitride alloy selected in existing preparation of nitrogen-containing alloy steel, the invention provides a Nb-containing microalloy building steel wire rod and a production method thereof. The steel wire rod comprises the components in percent 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, 0.010-0.050% of Nb and the balance of Fe and inevitable impurities. The key of the preparation method is to feed N-containing core-coated wireson a small platform behind a furnace to adjust the N to a proper level. The production method is simple to operate, high in N yield and stable, can effectively reduce the production cost and is worthy of popularization.

Description

technical field [0001] The invention belongs to the field of iron and steel metallurgy, and in particular relates to a Nb-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 i...

Claims

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Application Information

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IPC IPC(8): C21D8/08C21C7/00C22C38/02C22C38/04C22C38/12
CPCC21D8/08C21C7/0056C21D8/065C22C38/001C22C38/02C22C38/04C22C38/12
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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