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V and Ti containing micro-alloyed building steel wire rod and 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: 2018-05-01
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 to remove C. When the composition of the molten steel is initially smelted to 0.06% C, 0.024% P, and 0.022% S, the temperature is 1653°C...

Embodiment 2

[0056] A steel plant adopts the technology of the present invention to produce HRB400(E) ribbed steel bars for construction in a 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→inert injection after furnace Gas + feeding cored wire → 6-machine 6-strand billet continuous casting machine casting into 150mm×150mm billet → billet heating → high-speed wire rolling 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, 0.019% P, and 0.028% S, the temperature is 1685°C When t...

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] 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 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 0.10% C, 0.021% P, and 0.026% S, the temperature is 1690°C ...

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Abstract

The invention belongs to the field of ferrous metallurgy, in particular to a V and Ti containing micro-alloyed building steel wire rod and a production method thereof. In order to solve the problems such as low nitrogen content and fewer types of a vanadium nitride alloy for preparing nitrogen-containing alloy steel, the invention provides the V and Ti containing micro-alloyed building steel wirerod and the production method thereof. The wire rod consists of the following components in percentage 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, less than orequal to 0.040% of P, less than or equal to 0.040% of S, 0.010-0.100% of V, 0.010%-0.030% of Ti and the balance of Fe and inevitable impurities. The key point of the production method is that an N-containing core-spun yarn is fed into a small platform behind a furnace to regulate N to proper level. The production method is simple to operate, is high and stable in nitrogen yield, further can effectively reduce the production cost, and is worthy of being popularized and used.

Description

technical field [0001] The invention belongs to the field of iron and steel metallurgy, and in particular relates to a V and Ti 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): C22C38/02C22C38/04C22C38/12C22C38/14C21D8/06C21D8/08C21C7/00C22C33/06
CPCC21C7/0056C21D8/065C21D8/08C21D2211/005C21D2211/009C22C33/06C22C38/001C22C38/02C22C38/04C22C38/12C22C38/14Y02P10/20
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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