CN108929996A - High nitrogen vanadium iron and preparation method thereof - Google Patents
High nitrogen vanadium iron and preparation method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/045—Alloys based on refractory metals
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C27/00—Alloys based on rhenium or a refractory metal not mentioned in groups C22C14/00 or C22C16/00
- C22C27/02—Alloys based on vanadium, niobium, or tantalum
- C22C27/025—Alloys based on vanadium, niobium, or tantalum alloys based on vanadium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C30/00—Alloys containing less than 50% by weight of each constituent
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C33/00—Making ferrous alloys
- C22C33/02—Making ferrous alloys by powder metallurgy
- C22C33/0257—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements
- C22C33/0278—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements with at least one alloying element having a minimum content above 5%
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C35/00—Master alloys for iron or steel
- C22C35/005—Master alloys for iron or steel based on iron, e.g. ferro-alloys
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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Abstract
The invention discloses a kind of high nitrogen vanadium iron and preparation method thereof.The composition of high nitrogen vanadium iron of the invention is calculated as with quality %: vanadium 20.0~55.0%, silicon 10.0~30.0%, nitrogen 10.0~25.0%, surplus is iron and inevitable impurity, the mass ratio of nitrogen and vanadium is 0.35~0.65, and the apparent density of the high nitrogen vanadium iron is 3.0~5.5g/cm3.High nitrogen vanadium iron quality of the invention is stable, ingredient is uniform, nitrogen content is high, consistency is high, nitrogen vanadium is than high, can be used as the alloy addition of Hi-Stren steel, tool steel, steel alloy or cast steel.The preparation method of high nitrogen vanadium iron of the invention is using vanadium iron, ferrosilicon as raw material, raw material is crushed, is finely ground to powdery, after evenly mixing, it is placed in reaction under high pressure furnace, it is filled with 7~12Mpa high pure nitrogen after vacuumizing and material is lighted by igniter, start to react, cools down, comes out of the stove in nitrogen after the reaction was completed, then finished product is crushed to required granularity.The preparation method process flow is short, technologically advanced, raw material sources are extensive.
Description
Technical field
The present invention relates to technical field of iron alloy, in particular to a kind of high nitrogen vanadium iron and preparation method thereof.
Background technique
Microalloying is the one of the important signs that of steel industry technological progress, and the alloying of steel is usually with manganese systems, silicon systems
Main, microalloying is to add micro vanadium, niobium, the nitride of titanium elements, carbide alloy etc. again on the basis of main ferroalloy.It is logical
It is often added by single alloy, composite alloy or in the form of nitride, carbide, the most commonly used is addition ferrovanadium nitride or vanadium nitrogen
Alloy.
A large amount of plant-scale practical applications prove that the nitride (such as vanadium nitride, ferrovanadium nitride) that vanadium is added into steel can
The mechanical property of steel is effectively improved, the reason is that these nitride elements form the effect of crystallization reinforcing in steel, from
And effectively improve the mechanical performance of steel.So the nitrogen content increased in steel plays an important role.
Increasing the more satisfactory mode of nitrogen content in steel is the microalloy nitride that addition is rich in nitrogen.The nitrogen of silicon nitride contains
The theoretical value of amount has reached 40%, is ideal rich nitrogen alloy, and element silicon be also during smelting steel can not
The element lacked.
The Chinese invention patent of Publication No. CN102041422B, a kind of entitled silicon nitride ferrovanadium and its production method is public
A kind of production method of silicon nitride ferrovanadium is opened, it carries out external heat using metallic vanadium powder or vanadium iron, iron powder, silicon powder and ferrosilicon
Silicon vanadium nitride iron product is made in calcination reaction.Using metal vanadium powder or vanadium oxide powder or ammonium vanadate or vanadium iron, or and carbon dust, with iron
Powder, silicon powder and ferrosilicon heating and calcining, reaction carry out in the solid state, and there are reactions to be not thorough, rich nitrogen hunger, residual oxygen content height, table
See the problems such as density is low；Wherein using vanadium iron and ferrosilicon external heat calcination reaction, foregoing problems are still remained, but due to vanadium iron
For raw material, compared with the former, product quality may be slightly good, but its production cost is higher.
The Chinese invention patent of Publication No. CN102888548A, a kind of entitled Silicon vanadium nitride and its production method discloses
A kind of production method of Silicon nitride vanadium alloy, it is raw material using vanadium iron, carries out combustion synthesis reaction preparation with ferrosilicon and nitrogenizes
Silicon vanadium alloy, but limited by production method, there are product silicone content low (≤10%), nitrogen content is relatively low, product consistency is low etc.
Problem.
The Chinese invention patent of Publication No. CN103526098B, entitled vanadium nitride Antaciron and its production method is public
A kind of Silicon vanadium nitride ferroalloy and its production method are opened, it is that raw material carries out combustion synthesis reaction and is made using silicon vanadium iron
Silicon vanadium nitride iron product.The silicon vanadium iron that such method needs specially to refine is as raw material, and raw material sources are limited, and product nitrogen contains
It measures relatively low, is unfavorable for expanding production and popularization.
Patent document
Patent document 1:CN102041422B patent gazette
Patent document 2:CN102888548A patent gazette
Patent document 3:CN103526098B patent gazette
Summary of the invention
For the prior art, there are above-mentioned shortcomings, the object of the invention is that, a kind of high nitrogen vanadium iron and its preparation are provided
Method.The high nitrogen vanadium iron prepared by this method, have both vanadium, two kinds of alloying elements of silicon and nitrogen content be high, ingredient uniformly, matter
Amount is stablized, consistency is high, nitrogen vanadium is than high, application effect is good.
To achieve the above object, the present invention provides a kind of high nitrogen vanadium iron, composition with quality % be calculated as vanadium 20.0~
55.0%, silicon 10.0~30.0%, nitrogen 10.0~25.0%, surplus are iron and inevitable impurity, the mass ratio of nitrogen and vanadium
It is 0.35~0.65, the apparent density of the high nitrogen vanadium iron is 3.0~5.5g/cm3。
Preferably, the composition of high nitrogen vanadium iron is calculated as with quality %: vanadium 20~26%, silicon 21~30%, nitrogen 14~17%, remaining
Amount is iron and inevitable impurity, and the mass ratio of nitrogen and vanadium is 0.55~0.65.
Preferably, the composition of high nitrogen vanadium iron is calculated as with quality %: vanadium 27~33%, silicon 18~26%, and nitrogen 11~15% is remaining
Amount is iron and inevitable impurity, and the mass ratio of nitrogen and vanadium is 0.35~0.45.
Preferably, the composition of high nitrogen vanadium iron is calculated as with quality %: vanadium 34~40%, silicon 15~23%, and nitrogen 14~19% is remaining
Amount is iron and inevitable impurity, and the mass ratio of nitrogen and vanadium is 0.35~0.45.
Preferably, the composition of high nitrogen vanadium iron is calculated as with quality %: vanadium 41~47%, silicon 12~20%, and nitrogen 15~20% is remaining
Amount is iron and inevitable impurity, and the mass ratio of nitrogen and vanadium is 0.35~0.45.
Preferably, the composition of high nitrogen vanadium iron is calculated as with quality %: V48~55%, silicon 10~18%, and nitrogen 15~20% is remaining
Amount is iron and inevitable impurity, and the mass ratio of nitrogen and vanadium is 0.30~0.45.
Preferably, the high nitrogen vanadium iron is suitble in Hi-Stren steel, tool steel, steel alloy or cast steel as alloy
Additive uses.
The present invention also provides a kind of preparation method of high nitrogen vanadium iron above-mentioned, this method is with vanadium iron, ferrosilicon and high-purity
Nitrogen is raw material, by vanadium iron, the broken simultaneously fine grinding of ferrosilicon, is placed in reaction under high pressure furnace, 7-12Mpa high pure nitrogen is filled with after vacuumizing
And material is lighted by igniter, start to react, cools down, comes out of the stove in nitrogen after the reaction was completed, then finished product is crushed to institute
Need granularity.
In the preparation method of high nitrogen vanadium iron of the invention, it is preferred that being crushed raw material and being finely ground to granularity is that 40~200 mesh account for
The mass ratio of whole powders is 20~60%, and is 40%~80% less than the mass ratio that the particle of 200 mesh accounts for whole particles.
In the preparation method of high nitrogen vanadium iron of the invention, it is preferred that when in reaction under high pressure furnace nitrogen drops down to 7Mpa and
When following, the ftercompction into the reaction under high pressure furnace in the way of one or many supplement nitrogen keeps nitrogen to be pressed in 7~12MPa.
Compared with prior art, the invention has the following beneficial effects: be original by using vanadium iron, ferrosilicon and high pure nitrogen
Material, it is creative using a kind of advanced material Self- propagating Sintering Synthetic technique by adjusting the granularity and proportion of vanadium iron and ferrosilicon
Ground is by one-step synthesis method high nitrogen vanadium iron, and the high nitrogen vanadium iron produced using this process, process flow is short, technology is first
Into, it is energy saving, also, stable product quality, the consistency for equal extent compared with prior art is obtained, and with
The prior art is higher compared to nitrogen content, nitrogen vanadium ratio is higher.
The advantages of high nitrogen vanadium iron of the invention has both ferrovanadium nitride and silicon nitride, rich nitrogen degree is high, alloying element is complete, apparently
Density is big, and cost is lower compared with other vanadium systems microalloying and niobium system microalloying, and section vanadium effect is obvious, and economic benefit is excellent
It is different.High nitrogen vanadium iron of the invention is suitable for making in Hi-Stren steel, tool steel, steel alloy or cast steel as alloy addition
With.
Specific embodiment
Specific embodiments of the present invention will be described in detail below, it is to be understood that protection scope of the present invention is not
It is restricted by specific implementation.
Unless otherwise explicitly stated, otherwise in entire disclosure and claims, term " includes " or its change
Changing such as "comprising" or " including " etc. will be understood to comprise stated element or component, and not exclude other members
Part or other component parts.
Hereinafter, high nitrogen vanadium iron of the invention is described in detail.For being related to " % " of element, as long as no special instructions
Mean that quality %.
<high nitrogen vanadium iron>
High nitrogen vanadium iron of the invention, composition are calculated as vanadium 20.0~55.0%, silicon 10.0~30.0%, nitrogen with quality %
10.0~25.0%, surplus is iron and inevitable impurity, and the mass ratio of nitrogen and vanadium is 0.35~0.65, the high nitrogen vanadium iron
Apparent density is 3.0~5.5g/cm3。
Vanadium: 20.0~55.0%
Vanadium (V) is necessary element in high nitrogen vanadium iron of the invention.Vanadium has the effect of crystallization reinforcing for steel.This hair
Suitable content of vanadium is 20~55% in bright high nitrogen vanadium iron.
Silicon: 10.0~30.0%
Silicon (Si) is necessary element in high nitrogen vanadium iron of the invention.Silicon has the effect of improving steel mechanics performance.This
The content of suitable silicon is 10.0~30.0% in the high nitrogen vanadium iron of invention.
Nitrogen: 10.0~25.0%
Nitrogen (N) is necessary element in high nitrogen vanadium iron of the invention.The price of nitrogen is very low, but there is substitution vanadium to improve steel
The effect of intensity.The content of suitable nitrogen is 10.0~30.0% in high nitrogen vanadium iron of the invention.
The surplus of the chemical composition of high nitrogen vanadium iron of the invention is Fe and impurity.Wherein, impurity refers to industrially manufacturing
It is mixed from raw material or from manufacturing environment etc. when above-mentioned high nitrogen vanadium iron, will not to above-mentioned high nitrogen vanadium iron generate it is dysgenic
Allow in range containing element.
<manufacturing method of high nitrogen vanadium iron>
One embodiment of the manufacturing method of high nitrogen vanadium iron of the invention is as follows.
The manufacturing method of high nitrogen vanadium iron of the invention is to be crushed vanadium iron, ferrosilicon raw material and be finely ground to powdery, after evenly mixing
It is placed in reaction under high pressure furnace, 7~12Mpa high pure nitrogen is filled with after vacuumizing, light material and carry out combustion synthesis reaction, reacted
It cools down, come out of the stove in nitrogen after, then finished product is crushed to required granularity.It is described in detail below.
Raw material
It, can be using the vanadium for example containing vanadium 50% as the raw material containing vanadium in the manufacturing method of high nitrogen vanadium iron of the invention
Iron (FeV50), the vanadium iron (FeV80) containing vanadium 80%, vanadium iron FeV80 and vanadium iron FeV50 are mixed to get mixed according to a certain percentage
Close object etc.；As siliceous raw material, siliceous 75% ferrosilicon (FeSi75) or siliceous 72% ferrosilicon (FeSi72) can be used
Deng purity being used for the nitrogen of 99.9%-99.999% as the nitrogen of raw material.
It is reacted after broken, mixing
Raw material is crushed to powdery, is placed in reaction under high pressure furnace after evenly mixing, it is high-purity to be filled with 7~12MPa after vacuumizing
Nitrogen is lighted material and is reacted.It cools down, come out of the stove in nitrogen after the reaction was completed, then finished product is broken into required granularity.
For the broken of raw material, inert gas shielding can such as be had using the broken and grinding device of this field spy
Grinding device.Raw material it is broken in, it is preferred that being crushed raw material, being finely ground to granularity is the matter that 40~200 mesh account for whole powder
Amount is 40%~80% than being 20~60%, and less than the mass ratio that the particle of 200 mesh accounts for whole particles.To guarantee that burning is closed
At the beneficial effect being succeeded.
In the manufacturing method of high nitrogen vanadium iron of the invention, by vacuumizing so that being put into the reaction under high pressure furnace of raw material
Pressure is -0.06~-0.08MPa and following.Then, it is filled with high pure nitrogen in aforementioned reaction under high pressure furnace, so that reaction under high pressure
Pressure in furnace is 7~12MPa, and lights material and reacted.The purity of high pure nitrogen above-mentioned can be 99.9%-
99.999% range.After lighting material, combustion synthesis reaction, conbustion synthesis occur for vanadium iron, ferrosilicon and nitrogen as raw material
Reaction is exothermic reaction, without supplementing the energy into, material can be sintered to compact massive object.
In the manufacturing method of high nitrogen vanadium iron of the invention, make pressure in aforementioned reaction under high pressure furnace by being filled with high pure nitrogen
Power reaches 7~12MPa.When pressure is lower than 7MPa, combustion synthesis reaction can be made to stop carrying out because of nitrogen deficiency, and pressure is more than
When 12MPa, it may appear that nitrogen surplus causes to waste and lead to that the production cost increases.From the above considerations, high pressure above-mentioned is anti-
Answering the pressure in furnace is preferably 7~12MPa.
The manufacturing method of high nitrogen vanadium iron through the invention can obtain stable product quality, ingredient by single step reaction
Uniformly, than high high nitrogen vanadium iron, which is suitable for as low-alloy high-strength steel, tool steel, steel alloy for consistency height, nitrogen vanadium
Or the high nitrogen vanadium iron additive of cast steel.Also, the manufacturing method of high nitrogen vanadium iron of the invention, process flow is short, technology is first
Into.
<apparent density>
Its consistency is evaluated by measuring the apparent density of high nitrogen vanadium iron.Specifically, the measuring method of apparent density is held
Measuring method specified in row GB/T 20567 " VN alloy ".
Embodiment
Embodiment 1
The ferrosilicon of vanadium iron containing vanadium 50%, siliceous 75% is taken, is crushed respectively, fine grinding.According to quality proportioning: vanadium iron
27.1kg, ferrosilicon 17.9kg add up to 45kg.After mixing, granularity is that the mass ratio that the particle of 40~200 mesh accounts for whole particles is 20
~60%, less than 200 mesh particle account for whole particles mass ratio be 20%~65%, be packed into reaction under high pressure furnace, it is closed after take out
Vacuum is filled with high pure nitrogen 99.999%, igniting when pressure reaches 7MPa carries out self- propagating combustion to -0.06~-0.08MPa
Synthetic reaction is burnt, keeping 7~12Mpa pressure to react 55 minutes terminates, and comes out of the stove when being cooled to 100 DEG C of furnace temperature.Finished product sample detection
Ingredient are as follows: vanadium 25.9%, silicon 25.16%, nitrogen 15.66%, nitrogen vanadium is than 0.60, apparent density 3.5g/cm3。
Embodiment 2
The ferrosilicon of vanadium iron containing vanadium 50%, siliceous 75% is taken, is crushed respectively, fine grinding.According to quality proportioning: vanadium iron
32.0kg, ferrosilicon 13.0kg add up to 45kg.Granularity accounts for mass ratio 20~60% in 40~200 mesh after mixing, accounts for less than 200 mesh
Mass ratio 20%~65% is packed into reaction under high pressure furnace, is evacuated to -0.06~-0.08MPa after closed, is filled with high pure nitrogen
99.99%, igniting when pressure reaches 8MPa carries out Self- propagating Sintering Synthetic reaction, and 7-12Mpa pressure is kept to react 58 minutes
Terminate, comes out of the stove when being cooled to 100 DEG C of furnace temperature.Finished product sample detection ingredient are as follows: vanadium 30.15%, silicon 18.72%, nitrogen 13.58%,
Nitrogen vanadium is than 0.45, apparent density 3.8g/cm3。
Embodiment 3
The vanadium iron containing vanadium 50%, the vanadium iron containing vanadium 80%, siliceous 72% ferrosilicon are taken, is crushed respectively, fine grinding.According to quality
Proportion: the vanadium iron 15.0kg containing vanadium 50%, the vanadium iron 14.0Kg containing vanadium 80%, ferrosilicon 16.0kg add up to 45kg.Granularity after mixing
Mass ratio 20~60% is accounted in 40~200 mesh, mass ratio 20%~65% is accounted for less than 200 mesh, reaction under high pressure furnace is packed into, after closed
It is evacuated to -0.06~-0.08MPa, is filled with high pure nitrogen 99.99%, igniting when pressure reaches 8MPa carries out self- propagating combustion
Synthetic reaction is burnt, keeping 7-12Mpa pressure to react 58 minutes terminates, and comes out of the stove when being cooled to 100 DEG C of furnace temperature.Finished product sample detection at
Be divided into: vanadium 35.38%, silicon 22.80%, nitrogen 15.57%, nitrogen vanadium is than 0.44, apparent density 4.1g/cm3。
Embodiment 4
The ferrosilicon of vanadium iron containing vanadium 80%, siliceous 75% is taken, is crushed respectively, fine grinding.According to quality proportioning: vanadium iron
27.45kg, ferrosilicon 17.55kg add up to 45kg.Granularity accounts for mass ratio 20~60% in 40~200 mesh after mixing, less than 200 mesh
Mass ratio 20%~65% is accounted for, reaction under high pressure furnace is packed into, is evacuated to -0.06~-0.08MPa after closed, is filled with high pure nitrogen
99.99%, igniting when pressure reaches 8MPa carries out Self- propagating Sintering Synthetic reaction, and 7-12Mpa pressure is kept to react 58 minutes
Terminate, comes out of the stove when being cooled to 100 DEG C of furnace temperature.Finished product sample detection ingredient are as follows: vanadium 41.28%, silicon 24.35%, nitrogen 16.74%,
Nitrogen vanadium is than 0.41, apparent density 4.5g/cm3。
Embodiment 5
The ferrosilicon of vanadium iron containing vanadium 80%, siliceous 75% is taken, is crushed respectively, fine grinding.According to quality proportioning: vanadium iron
29.25kg, ferrosilicon 15.75kg add up to 45kg.Granularity accounts for mass ratio 20~60% in 40~200 mesh after mixing, less than 200 mesh
Mass ratio 20%~65% is accounted for, reaction under high pressure furnace is packed into, is evacuated to -0.06~-0.08MPa after closed, is filled with high pure nitrogen
99.999%, igniting when pressure reaches 7MPa carries out Self- propagating Sintering Synthetic reaction, and 7-12Mpa pressure is kept to react 55 points
Clock terminates, and comes out of the stove when being cooled to 100 DEG C of furnace temperature.Finished product sample detection ingredient are as follows: vanadium 45.32%, silicon 21.64%, nitrogen
17.56%, nitrogen vanadium is than 0.39, apparent density 5.0g/cm3。
Illustrate: this product density advantages do not protrude, and the low density of content of vanadium is low, and the high density of content of vanadium is high, VN alloy
3.0~3.7g/cm of density3, 3.0~5.5g/cm of this product3, do not have to comparison；VN alloy is also one-step method, is not two-step method；
Difference is that this product is combustion synthesis process, and sintering is completed in the exothermic reaction for synthesizing generation under high pressure by nitrogen and vanadium, silicon, no
External energy is needed, VN alloy is additional thermal process.
The present embodiment process flow is short, technologically advanced.Stable product quality, ingredient are uniform, consistency is high, nitrogen vanadium is than high,
It can be used as the high nitrogen vanadium iron additive of Hi-Stren steel, tool steel, steel alloy or cast steel.
The aforementioned description to specific exemplary embodiment of the invention is in order to illustrate and illustration purpose.These descriptions
It is not wishing to limit the invention to disclosed precise forms, and it will be apparent that according to the above instruction, can much be changed
And variation.The purpose of selecting and describing the exemplary embodiment is that explaining specific principle of the invention and its actually answering
With so that those skilled in the art can be realized and utilize a variety of different exemplary implementation schemes of the invention and
Various chooses and changes.The scope of the present invention is intended to be limited by claims and its equivalents.
Claims (7)
1. a kind of high nitrogen vanadium iron, which is characterized in that the composition of the high nitrogen vanadium iron is calculated as with quality %: vanadium 20.0~55.0%,
Silicon 10.0~30.0%, nitrogen 10.0~25.0%, surplus are iron and inevitable impurity, the mass ratio of nitrogen and vanadium is 0.35~
0.65, the apparent density of the high nitrogen vanadium iron is 3.0~5.5g/cm3。
2. high nitrogen vanadium iron according to claim 1, which is characterized in that the high nitrogen vanadium iron is compact massive object.
3. high nitrogen vanadium iron according to claim 1, which is characterized in that the high nitrogen vanadium iron Hi-Stren steel,
It is used in tool steel, steel alloy or cast steel as alloy addition.
4. a kind of preparation method of high nitrogen vanadium iron described in claim 1, which is characterized in that raw material are as follows: vanadium iron, ferrosilicon, high-purity
Nitrogen；Its technology of preparing is Self- propagating Sintering Synthetic technology；
By vanadium iron, ferrosilicon raw material is broken is finely ground to powdery, is placed in reaction under high pressure furnace after evenly mixing, it is filled with 7 after vacuumizing~
12Mpa high pure nitrogen is lighted material and is reacted, after the reaction was completed in nitrogen it is cooling, come out of the stove, then needed for finished product is crushed to
Granularity.
5. the preparation method of high nitrogen vanadium iron according to claim 4, which is characterized in that the pressure vacuumized be-
0.06MPa and following.
6. the preparation method of high nitrogen vanadium iron according to claim 4, which is characterized in that the vanadium iron, ferrosilicon is broken thin
Mill, so that granularity is that 40~200 mesh account for whole vanadium iron, the mass ratio of ferrosilicon raw material powdery object is 20%~60%, and is less than
The mass ratio that the particle of 200 mesh accounts for whole particles is 40%~80%.
7. the preparation method of high nitrogen vanadium iron according to claim 4, which is characterized in that when nitrogen pressure in the reaction under high pressure furnace
Under be reduced to 7Mpa and it is following when, the ftercompction into the reaction under high pressure furnace in the way of one or many supplement nitrogen, keep nitrogen
It is pressed in 7~12MPa.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113930661A (en) * | 2021-08-10 | 2022-01-14 | 河钢承德钒钛新材料有限公司 | Preparation method of nitrided ferrovanadium alloy additive |
| CN114790529A (en) * | 2022-04-20 | 2022-07-26 | 河北诺凡新材料科技有限公司 | High-nitrogen silicon vanadium iron alloy and production method thereof |
| CN115572888A (en) * | 2022-09-29 | 2023-01-06 | 中色（宁夏）东方集团有限公司 | Ferrovanadium alloy and preparation method thereof |
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| CN115572888B (en) * | 2022-09-29 | 2023-11-24 | 中色（宁夏）东方集团有限公司 | Ferrovanadium alloy and preparation method thereof |
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