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Construction steel wire rod containing Ti microalloy and a ladle furnace (LF) production method thereof

A production method and micro-alloy technology, which are 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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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 (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.

[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 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 1658°C Wh...

Embodiment 2

[0058] 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.

[0059] 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 0.12% C, 0.022% P, and 0.021% S, the temperature is 1661°C When ...

Embodiment 3

[0069] 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 200mm×200mm billet → billet heating → high-speed wire rolling into Ribbed steel bars.

[0070]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 0.08% C, 0.021% P, and 0.020% S, the temperature is 1673°C When t...

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Abstract

The invention belongs to the field of ferrous metallurgy, and particularly relates to a construction steel wire rod containing Ti microalloy and a ladle furnace (LF) production method thereof. Aimingat solving the problems that vanadium nitride adopted for preparing nitrogen-contained alloy steel in the prior art is low in nitrogen content and small in variety, the invention provides the construction steel wire rod containing the Ti microalloy and the LF production method thereof. 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, 0-0.040% of P, 0-0.040% of S, 0.010-0.050% of Ti, and the balance Fe and inevitable impurities. The preparation method is characterized in that N-contained core-spun wires are fed after LF refining,and N is adjusted to the proper level. The method is easy to implement, the nitrogen yield is high and stable, the production cost can be effectively reduced, and the method is worthy of applicationand popularization.

Description

technical field [0001] The invention belongs to the field of iron and steel metallurgy, and in particular relates to a Ti-containing microalloy building steel wire rod and a production method thereof for an LF furnace. 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): C22C38/04C22C38/02C22C38/14C21D8/06C21D8/08C21C7/00C22C33/06
CPCC21C7/0056C21D8/065C21D8/08C21D2211/005C21D2211/009C22C33/06C22C38/001C22C38/02C22C38/04C22C38/14Y02P10/20
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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