A kind of vanadium nitrogen alloy liquid phase sintering production method
A technology of liquid phase sintering and production method, which is applied in the field of metallurgical production, can solve the problems of increasing production process and production cost, increasing the nitrogen content of alloy products, and the difficulty of uniform dispersion of materials, so as to improve nitriding efficiency and product nitrogen content , Improve product quality, increase the effect of effective reaction area of materials
Active Publication Date: 2018-02-02
四川双荣新材料科技有限公司
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Problems solved by technology
Although the pressing process is conducive to improving the strength of alloy products, the pressing process is complicated, the construction period is long, the investment in equipment is large, the material is not easy to disperse evenly, and the binder used for pressing needs to be removed during the firing process as impurities, which further increases the production process and Cost of production
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment 1
[0020] Take 20kg of ammonium metavanadate powder and 20kg of vanadium pentoxide powder, use a blender for thorough mixing, and put them into a bottom-blown smelting furnace. A nitrogen gas with a flow rate of 10 L / min was passed into the furnace body as a protective atmosphere, and the temperature was set to 240°C for 1 hour and 320°C for 1 hour. Then set the temperature to 1200℃ for 6 hours, and pass methane gas and ammonia gas into the furnace at the same time, the gas flow rate is 30L / min. After the reaction is over, the nitrogen flow rate is increased to 30L / min to accelerate the heat reduction of the product in the furnace. After the temperature in the measuring furnace dropped to 120°C, the furnace was opened and the vanadium-nitrogen alloy product was taken out. In the product: the vanadium content is 82%, the nitrogen content is 16%, and the apparent density is 3.65g / cm 3 .
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Abstract
The invention discloses a liquid phase sintering production method of vanadium nitrogen alloy. The liquid phase sintering production method comprises the steps that after 20 to 40 parts of ammonium metavanadate powder and 18 to 30 parts of vanadium pentoxide powder are fully mixed, the mixture is fed into a sintering furnace; the mixture is heated to 220 to 320 DEG C under nitrogen protection, and ammonium metavanadate is molten to react with the vanadium pentoxide powder for 2 to 3 hours to generate a liquid phase intermediate material; then, the liquid phase intermediate material is quickly heated to 1100 to 1250 DEG C, methane gas and ammonia gas are blown into the liquid phase material from the lower part of the furnace, and nitrocarburizing sintering is carried out for 6 to 8 hours; and when the furnace temperature reaches 120 DEG C, the material is taken out to obtain vanadium nitrogen alloy. Through the adoption of the scheme, the material dispersion uniformity and nitriding efficiency are improved, and the density and strength performances of a product are improved; and the liquid phase sintering manner is adopted, the materials are directly fed into the sintering furnace to be heated and sintered, and the pressing molding treatment is not needed, so that the production procedure is simplified, the production efficiency is improved, and the production cost is reduced.
Description
Technical field [0001] The invention relates to a liquid phase sintering production method of vanadium-nitrogen alloy, which belongs to the technical field of metallurgical production. Background technique [0002] Studies have shown that nitrogen is harmful to most steel grades, but for high-strength alloy steels, an increase in its content can significantly improve the performance of vanadium in steel, thereby enhancing the work hardening ability of alloy steel. When vanadium-nitrogen alloy is used as an additive to produce microalloyed steel, vanadium and nitrogen can be introduced at the same time during the production process, so that the strength, toughness and shape of the product are significantly improved. [0003] At present, there are many researches on the production process of vanadium-nitrogen alloy, and both domestic and foreign enterprises have realized mass production. For example, the United Carbonization Company of the United States uses vanadium trioxide, carbo...
Claims
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IPC IPC(8): C22C1/05C23C8/30C22C35/00
CPCC22C1/058C22C35/00C23C8/30
Inventor 雷勤刘波
Owner 四川双荣新材料科技有限公司