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Vanadium and nitrogen alloying cored wire and method for molten steel

A technology of nitrogen alloying and cored wire, which is applied in the field of nitrogen alloying and vanadium in molten steel, can solve the problems of affecting product quality stability, large fluctuations in vanadium recovery rate, and poor fluidity of steel slag, so as to prevent wire jamming and The effect of disconnection, small fluctuation, and improved recovery rate

Active Publication Date: 2012-11-07
PANZHIHUA IRON AND STEEL +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method has the following disadvantages: the vanadium recovery rate is still low, and the fluctuation range of the vanadium recovery rate and nitrogen recovery rate is large, which affects the stability of product quality; In the liquid process, the resistance of the steel slag is relatively large, and the wire breakage or jamming often occurs

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  • Vanadium and nitrogen alloying cored wire and method for molten steel

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Embodiment 1

[0036] The vanadium-nitrogen alloy cored wire for alloying vanadium and nitrogen in molten steel includes a core layer, the core layer is composed of vanadium nitride alloy and metal aluminum, and the weight ratio of the vanadium nitride alloy and metal aluminum is: Vanadium nitride alloy: 90%, metal aluminum: 10%, both vanadium nitride alloy and metal aluminum are powder materials, the particle size is less than 2mm, the core layer is wrapped with a sheath made of cold-rolled strip steel, and the entire cored wire The outer diameter is 12mm, and the recovery rate of vanadium is 96%.

Embodiment 2

[0038] The vanadium-nitrogen alloy cored wire for alloying vanadium and nitrogen in molten steel includes a core layer, the core layer is composed of vanadium nitride alloy and metal aluminum, and the weight ratio of the vanadium nitride alloy and metal aluminum is: Vanadium nitride alloy: 65%, metal aluminum: 35%, both vanadium nitride alloy and metal aluminum are powder materials, the particle size is less than 3mm, the core layer is wrapped with a sheath made of cold-rolled strip steel, and the entire cored wire The outer diameter is 12mm, and the recovery rate of vanadium is 97.8%.

Embodiment 3

[0040] A vanadium-nitrogen alloy cored wire for alloying molten steel with vanadium and nitrogen, including a core layer containing a vanadium nitride alloy, metal aluminum and vanadium-iron alloy, and the above-mentioned vanadium nitride alloy and metal aluminum and vanadium-iron alloy The weight ratio is: vanadium nitride alloy: 80%, metal aluminum: 10%, and vanadium-iron alloy: 10%. Vanadium nitride alloy, metal aluminum and vanadium-iron alloy are all powder materials, the particle size is less than 3mm, the core layer is wrapped with a sheath made of cold-rolled strip steel, the outer diameter of the entire cored wire is 13mm, and the vanadium recovery rate is 96.5 %.

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Abstract

The invention discloses a vanadium and nitrogen alloying cored wire and a vanadium and nitrogen alloying cored method for molten steel, which can improve the recovery rate of vanadium, prevent wire lockage and breakage, and facilitate feeding the cored wire. The cored wire comprises a core layer and a skin, wherein the core layer contains a vanadium nitride alloy and an aluminum metal. The methodmainly comprises the following steps of: adding the aluminum metal into the core layer of the cored wire; and feeding the cored wire into the molten steel. By adding the aluminum metal into the core layer, the free oxygen content in the molten steel can be reduced, and the possibility of combining vanadium and oxygen is reduced, so that more vanadium participates in alloying to improve the recovery rate of the vanadium. In addition, by adding the aluminum metal, the fluidity of steel slag can be improved; and through the better fluidity of the steel slag, the cored wire is convenient to feed into the molten steel, the loss of the cored wired in a steel slag layer is reduced, the recovery rate of the vanadium and the recovery rate of nitrogen are improved, and the wire blockage and wire breakage can be prevented in the process of feeding the cored wire into the molten steel.

Description

technical field [0001] The invention relates to a vanadium-nitrogen alloy cored wire for realizing alloying of vanadium and nitrogen in molten steel and a method for realizing alloying of vanadium and nitrogen in molten steel. Background technique [0002] Vanadium nitride alloy is a new alloy additive that can replace ferrovanadium for the production of microalloyed steel. The addition of vanadium nitride alloy to steel can improve the comprehensive mechanical properties of steel such as strength, toughness, ductility and thermal fatigue resistance, and make the steel have good weldability. When the same strength is achieved, the addition of vanadium nitride saves 30-40% of the added vanadium, thereby reducing the cost. Vanadium nitride alloys can be used in structural steel, tool steel, pipe steel, steel bars and cast iron. The application of vanadium nitride alloy in high-strength low-alloy steel can effectively micro-alloy vanadium and nitrogen at the same time, promot...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C7/00C22C33/04
Inventor 刘明吴仕富杨杰张国才邓通武柏万春罗开金刘昌恒
Owner PANZHIHUA IRON AND STEEL
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