Ferrovanadium nitride alloy and preparation method thereof

A ferro-vanadium nitride alloy and ferro-vanadium nitride technology are applied in the field of ferro-vanadium nitride alloy preparation, which can solve problems such as difficulty in popularization, inconvenient addition of vanadium nitride, and low effective yield of vanadium, and achieve simplified preparation process, with Effects of market competitiveness and improvement of labor productivity

A ferro-vanadium nitride alloy and ferro-vanadium nitride technology are applied in the field of ferro-vanadium nitride alloy preparation, which can solve problems such as difficulty in popularization, inconvenient addition of vanadium nitride, and low effective yield of vanadium, and achieve simplified preparation process, with Effects of market competitiveness and improvement of labor productivity

CN1876873AInactive Publication Date: 2006-12-13闵小兵
2 Cites 35 Cited by

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031]Example 1: Put 1000 grams of vanadium oxide containing 54.1% vanadium, 250 grams of graphite powder, and 45 grams of iron powder into a ball mill to pulverize and mix, pass through an 80-mesh sieve, add 105 milliliters of 1.5% cellulose aqueous solution, mix and briquette Molded, pressed into a briquette of Ф20*20, dried at 120°C for 2 hours, and put into a nitrogen-protected carbon tube furnace for carbothermal reduction, nitriding, and sintering reactions. The temperature of the first stage is 1200 degrees, the temperature of the second stage is 1350 degrees, and the temperature of the third stage is 1490 degrees. The mixture briquette stays in the third stage for 2 hours, the nitrogen flow in the furnace is controlled so that its pressure is 30-60 Pa higher than the pressure outside the furnace, and the nitrogen dew point is -40 degrees. After the reaction, it was cooled to 150°C under nitrogen protection and released from the furnace.

[0032] The composition of the...

Embodiment 2

[0033] Embodiment 2: 1000 grams of vanadium oxide powder containing 54.1% of vanadium, 205 grams of graphite powder, and 460 grams of iron powder are mixed and ball milled, passed through an 80-mesh sieve, and 120 ml of cellulose aqueous solution containing 1.5% is added, mixed and briquetting , pressed into a φ20*20 material block, dried at 110°C for 2.5 hours, then put into a nitrogen-filled muffle sintering furnace at a temperature of 1100°C to 1460°C for carbothermal reduction, nitriding and sintering reactions. 1460 ℃ temperature zone holding time 2.5 hours. Cool down with furnace protection to below 100°C. The flow rate of nitrogen gas is to protect the pressure inside the furnace to be 30-70 Pa higher than the pressure outside the furnace, and the nitrogen dew point is -40 degrees.

[0034] Composition of the ferrovanadium nitride obtained: V: 48.1%, Fe: 40.96%, N: 9.95%, C: 0.19%, P: 0.08%, S3 .

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
densityaaaaaaaaaa
Login to View More

Abstract

This invention is azotize ferro-vanadium and method for making same. The composition of azotize ferro-vanadium is: vanadium 47-81%, nitrogen 8-16%, iron 4-44%, carbon<=1%, silicon<=1.50%, aluminium<=0.01%, manganese<=0.50%, sulfur<=0.05%, phosphor<=0.05%; the method includes following steps: mixing powderedvanadium compound, carbonaceous reducer and ferrous powder, then adding agglomerant, briquetting, putting them into metallurgical furnace with protective atmosphere when they have been dry to do carbon thermal reduction, nitridation and sintered reaction, the temperature of carbon thermal reduction part is: 900-1200DEG C, the temperature of nitridation part is: 1200DEG C-1350 DEG C, the temperature of sintered reaction part is: 1350DEG C-1490DEG C, the total reaction time is: 2-18 hours. This invention simplifies traditional technique, greatly shortens reaction period, reduces the equipment input and cost of production, the obtained products is of stable quality, high vanadium yield, large density, low fusing point in steel application.

Description

technical field [0001] The invention belongs to the technical field of ferroalloy preparation, and in particular relates to a method for preparing ferrovanadium nitride alloy. Background technique [0002] The main use of vanadium is as an alloying element for smelting alloy steel. A large number of industrial-scale application data of vanadium-containing steel show that increasing the nitrogen content can increase the yield strength of the steel. Coarsening trend, after the addition of nitrogen in the steel, the precipitated phase particles become finer, so as to give full play to the strengthening effect of vanadium in the steel. In high-strength low-alloy steels, the use of ferrovanadium nitride can effectively strengthen and refine grains. Under the specified strength level, increasing nitrogen in steel can save vanadium consumption. Compared with ferrovanadium ferrovanadium, ferrovanadium nitride can save vanadium consumption as high as 15%-30%, and reduce steelmaking ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
13 Dec 2006
Publication
CN1876873A
IPC
C22C27/02; C22C30/00; C22C1/04; C22B5/10; B22F3/16
Inventors
闵小兵