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Carbon-nitrogen-vanadium alloy containing titanium and manufacturing method thereof

A carbon-nitrogen-vanadium alloy and alloy technology, applied in the field of molten steel additives, can solve the problems of increasing the cost of alloy steel, increasing the process of adding additives, unfavorably balanced utilization of vanadium-titanium resources, etc., achieving high production efficiency, reducing the adding process, and wide source. Effect

Active Publication Date: 2009-07-08
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The introduction of vanadium into steel is usually added in the form of vanadium-iron or vanadium-nitrogen alloy in the existing process, and the introduction of titanium into steel is mainly added in the form of titanium or ferro-titanium in the existing process, that is, vanadium and titanium are added in different forms Additives enter the molten steel, which not only increases the cost of alloy steel, but also increases the process of adding additives, and is not conducive to the balanced utilization of vanadium and titanium resources, because titanium is more abundant in resources than vanadium, and the cost is relatively low.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Will 67.3gV 2 o 5 , 20.7gTiO 2 , 32.6g of activated carbon and 2.86g of ferric oxide powder are rolled and ball milled, the ball-to-material ratio is 10:1, the ball milling time is limited to the uniform powder mixing (about 10 hours), and then the uniformly mixed powder is pressed into shape with a press , The compact size is Φ10mm×8mm. Put the compact into a carbon tube furnace or an induction furnace for heating, and pass high-purity nitrogen gas at 350°C, and the nitrogen pressure is 101325Pa; when the temperature reaches 650°C, keep it for 1 hour, and then heat it to 1300°C for 4 hours to generate carbonization And nitriding reaction, after the heat preservation is completed, it is cooled to below 100°C and released from the furnace to obtain a titanium-containing carbon-nitrogen vanadium alloy. The components and weight percentages of each component are: vanadium 57.5%, titanium 19%, carbon 5.5% , Nitrogen 15%, Iron 3%, the apparent density is 3300kg / m 3 .

Embodiment 2

[0036] Will 65.2gV 2 o 3 , 10.4g TiO 2 , 22.4g of charcoal and 3g of Co powder are subjected to high-energy ball milling, the ball-to-material ratio is 10:1, and the ball-milling medium is absolute ethanol. After the following drying, it is pressed into shape with a press, and the size of the compact is Φ15mm×10mm. Put the green compact into a tube furnace, rotary furnace or tunnel kiln for heating, inject high-purity ammonia gas at 250°C, and the pressure of ammonia gas is 101325Pa; when the temperature reaches 650°C, keep it for 1 hour, then heat it to 1200°C for 3 Carbonization and nitriding reactions occur within hours. After the heat preservation is completed, the furnace is cooled to below 100°C and released from the furnace. The titanium-containing carbon-nitrogen vanadium alloy is obtained. The components and weight percentages of each component are: vanadium 66.2%, titanium 9.3% , carbon 5.3%, nitrogen 14.7%, cobalt 4.5%, and its apparent density is 4210kg / m 3 . ...

Embodiment 3

[0038] Will 86.4gV 2 o 5 , 4gTiO 2, 32.2g of graphite and 1g of Ni powder are rolled and milled, the ball-to-material ratio is 10:1, the ball-milling medium is absolute ethanol, the ball-milling time is limited (about 48 hours) to the uniform powder mixing, and then the uniform powder is mixed at 100°C After the following drying, it is pressed and formed with a press, and the size of the green compact is Φ10mm×10mm. Put the green compact into a shaft furnace or a shaking furnace for heating, feed high-purity nitrogen and ammonia at 250°C (the volume ratio of nitrogen to ammonia is 1:1), and the pressure is 101325Pa; when the temperature reaches 650°C, keep it for 3 hours; then heated to 1350°C and kept warm for 3.5 hours to generate carbonization and nitriding reactions. After the heat preservation was completed, it was cooled to below 100°C and released from the furnace to obtain a titanium-containing carbon-nitrogen vanadium alloy. The weight percentage of its components a...

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Abstract

The invention provides a carbon nitrogen vanadium alloy containing titanium and the alloy comprises the following components by weight: vanadium of 55-80%, titanium of 0.1-20%, carbon of 0.1-10%, nitrogen of 8-20% and density hardening agent of 0.1-5%.The invention also provides a method of preparing the carbon nitrogen vanadium alloy containing titanium, and the method comprises the following steps: (1) calculating and weighing powdery vanadium-contained base material, titanium-contained supplementary material, carbonaceous reducing agent and density hardening agent according to the weight percentages of vanadium, titanium, carbon and the density hardening agent; (2) performing roll-grinding to the raw materials proportioned in the step (1), pressing the mixed materials into blanks after being grinded; (3) putting the blanks formed in the step (2) into a reduction reaction furnace for being sintered, adding nitrogen gas or alkaline gas or other gas mixture into the reduction reaction furnace at any temperature below 650 DEG C, keeping the temperature for 1-3 hours when the temperature comes to 1000-1400 DEG C, then the furnace and the materials therein are cooled under 100 DEG C, finally the materials are took off the furnace.

Description

technical field [0001] The invention belongs to the field of molten steel additives, in particular to a titanium-containing carbon-nitrogen vanadium alloy that needs to be added to molten steel and a preparation method thereof. Background technique [0002] In the industry, it is often necessary to add trace alloying elements to molten steel, such as silicon, manganese, chromium, nickel, molybdenum, tungsten, vanadium, titanium, niobium, boron, aluminum, etc., to improve the toughness, ductility, hardness and heat resistance of steel. Comprehensive mechanical properties such as fatigue and corrosion resistance, among which vanadium and titanium are one of the more commonly used added elements. [0003] Studies have shown that adding trace elements of vanadium and titanium to steel has the following effects: vanadium can be solid-dissolved into iron in an unlimited amount, and can prevent the growth of austenite grains and deacidification and oxygen removal. The quenching te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C27/02C22C35/00C21C7/04C21C7/06C22C1/05C22C1/10
Inventor 刘颖叶金文邓莉姜中涛高升吉涂铭旌
Owner SICHUAN UNIV
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