Vanadium nitrogen alloy preparing method

Abstract

The invention relates to a vanadium nitrogen alloy preparing method. Powdered vanadium oxide, or ammonium metavanadate or ammonium polyvanadate and carbonaceous powder are uniformly mixed and stirredaccording to the requirement of a raw material formula. After undergoing dry powder extrusion and ball formation on a dry powder balling machine, the mixture is put into a vacuum intermediate-frequency heating reacting furnace. When the furnace is vacuumized to 270 Pa and the temperature in the furnace is raised to 900 DEG C, nitrogen gas is introduced. Under the protection of the nitrogen gas, the following preparation processes are carried out: when the temperature in the furnace is gradually raised to 1000-1400 DEG C and the vacuum degree in the furnace is kept at 400 Pa, carbonization andnitrogenization reactions are carried out; when the temperature in the furnace is raised to 1500-1600 DEG C and the pressure in the furnace is kept at 0.05 MPa, further heating is conducted to improvethe apparent density of a billet; and finally the billet is cooled in a storage cabin inside the furnace to obtain a temperature lower than 100 DEG C, thereby obtaining the vanadium nitrogen alloy product, wherein V is 78-81%, N is 16-19%, C is 2-3%, si. P. L is less than or equal to 0.05%, and the apparent density is 6.3-6.8 g / cm<3>. The method is characterized in that the billet preparation eliminates the use of binder, instead, the dry powder balling machine is used for extrusion and ball formation; and the apparent density of the vanadium nitrogen alloy is great.

Description

1 Technical field

[0001] The invention relates to a production method of an additive vanadium-nitrogen alloy for smelting special steel. 2 background technology

[0002] At present, regarding the production methods of vanadium-nitrogen alloys, there are many kinds of reports from relevant parties, and they are different in the ratio of raw materials, preparation process, heating furnace, etc., but in the production process of product blanks, all adopt Water-soluble binder, for wet billet making; the water content in the billet is large, and the billet must be pre-fired during the production process to remove the water and harmful gases in the billet. These two points are the same, so The production process of these vanadium-nitrogen alloys is complicated, the production period is long, the efficiency is low, and the cost is high, and the apparent density of the produced vanadium-nitrogen alloy products is small. 3. Contents of the invention

[0003] In order to solve the ...