CN113718103B - Method for forming powdery vanadium-nitrogen alloy - Google Patents

Method for forming powdery vanadium-nitrogen alloy Download PDF

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CN113718103B
CN113718103B CN202110984328.1A CN202110984328A CN113718103B CN 113718103 B CN113718103 B CN 113718103B CN 202110984328 A CN202110984328 A CN 202110984328A CN 113718103 B CN113718103 B CN 113718103B
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vanadium
nitrogen alloy
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CN113718103A (en
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张春雨
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Hunan Zhongxin New Materials Technology Co ltd
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Hunan Zhongxin New Materials Technology Co ltd
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B1/00—Preliminary treatment of ores or scrap
    • C22B1/14—Agglomerating; Briquetting; Binding; Granulating
    • C22B1/24—Binding; Briquetting ; Granulating
    • C22B1/242—Binding; Briquetting ; Granulating with binders
    • C22B1/244—Binding; Briquetting ; Granulating with binders organic
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B1/00—Preliminary treatment of ores or scrap
    • C22B1/14—Agglomerating; Briquetting; Binding; Granulating
    • C22B1/16—Sintering; Agglomerating
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B1/00—Preliminary treatment of ores or scrap
    • C22B1/14—Agglomerating; Briquetting; Binding; Granulating
    • C22B1/24—Binding; Briquetting ; Granulating
    • C22B1/2406—Binding; Briquetting ; Granulating pelletizing
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C33/00—Making ferrous alloys
    • C22C33/006—Making ferrous alloys compositions used for making ferrous alloys
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C35/00—Master alloys for iron or steel

Abstract

A method for forming a powdery vanadium-nitrogen alloy comprises the following raw materials in percentage by mass: 50-70% of vanadium compound, 3-5% of carbonaceous reducing agent, 2-5% of binder, 10-15% of water and 10-30% of iron powder; the adhesive is as follows: 20-30 parts of polyester resin, 5-10 parts of hydroxy acrylic resin and 1 part of polycarbonate diol. According to the invention, water and the binder with specific types and proportions are added during the forming of the vanadium-nitrogen alloy, and the proportion of the binder and the water is reasonably controlled, so that the binder can be fully diffused and deeply enter the activated vanadium compound during mixing, the contact area is increased, the moisture volatilizes after drying, the binder is dried, the vanadium-nitrogen alloy is tightly bound, and the powder is not easy to disperse. The strength of the formed vanadium-nitrogen alloy obtained by the invention is 25-32MPa, and the density is 2.8-3.2g/cm.

Description

Method for forming powdery vanadium-nitrogen alloy
Technical Field
The invention relates to the field of vanadium-nitrogen alloys, in particular to a method for forming a powdery vanadium-nitrogen alloy.
Background
In the production and manufacturing process of steel, vanadium-nitrogen alloy is often added to improve the comprehensive mechanical properties of the steel, such as strength, toughness, ductility, thermal fatigue resistance and the like, and the steel has good weldability. The vanadium-nitrogen alloy is used as a new product, the research on the production technology of the vanadium-nitrogen alloy is a trend necessary in the vanadium industry, and the vanadium-nitrogen alloy needs to be molded when the vanadium-nitrogen alloy is produced, but the existing part of vanadium-nitrogen alloy is easy to break after being molded during production and manufacturing, so that loss is caused, and the problem of high product manufacturing cost exists.
Disclosure of Invention
The invention aims to solve the technical problem of overcoming the defects of the prior art and provides a method for molding a powdery vanadium-nitrogen alloy, wherein the obtained vanadium-nitrogen alloy has good moldability and is not easy to break after molding.
The technical scheme adopted by the invention for solving the technical problem is that,
a method for forming a powdery vanadium-nitrogen alloy comprises the following raw materials in percentage by mass: 50-70% of vanadium compound, 3-5% of carbonaceous reducing agent, 2-5% of binder, 10-15% of water and 10-30% of iron powder. The sum of the mass percentages of the raw materials is 100 percent.
Further, the binder is: 20-30 parts of polyester resin, 5-10 parts of hydroxy acrylic resin and 1 part of polycarbonate diol.
The invention adds water to dilute the binder, and reasonably controls the proportion of the binder and the water, so that the binder can be fully diffused and deeply enter the activated vanadium compound during mixing, the contact area is increased, the moisture is volatilized after drying, the binder is dried, the vanadium-nitrogen alloy is tightly bound, and powder scattering is difficult.
Further, the polyester resin is preferably a saturated polyester resin, and preferably has a number average molecular weight Mn of 3000 to 5000. Researches show that the resin with too large number average molecular weight is difficult to permeate into vanadium-nitrogen alloy molecules or among the molecules, which is not beneficial to improving the cohesiveness and the formability; on the contrary, the resin with too small number average molecular weight has insufficient adhesive property, which is not beneficial to the molding of vanadium-nitrogen alloy. Through experiments, the forming performance of the vanadium-nitrogen alloy can be improved by selecting a proper number average molecular weight.
Further, the content of the hydroxyl acrylic resin is preferably 40 to 45% by weight. The hydroxyl acrylic resin has excellent adhesive force and water resistance on vanadium-nitrogen alloy materials; can improve the forming property, the water resistance and the post-processing stability of the vanadium-nitrogen alloy.
Further, the polycarbonate diol preferably has a number average molecular weight Mn of 1500 to 1600. The polycarbonate diol is added to the vanadium nitride molding agent, so that the water resistance is mainly improved, and the vanadium nitride is not scattered in water after being molded. Has excellent machinability.
Further, the vanadium compound is at least one of vanadium pentoxide, vanadium trioxide, ammonium metavanadate, sodium metavanadate and potassium metavanadate.
Further, the carbonaceous reducing agent is at least one of graphene, coke and graphite.
The forming method of the powdery vanadium-nitrogen alloy comprises the following steps:
crushing and ball-milling a vanadium compound, and ball-milling the vanadium compound until the particle size is 80-120 meshes to obtain the ball-milled vanadium compound;
on one hand, the ball milling controls the particle size of the raw materials, on the other hand, the ball milling activates the vanadium compound of the raw materials to increase the contact area with the binder, thus being beneficial to the function of the binder and further being beneficial to the molding of the vanadium-nitrogen alloy.
Step two, adding the ball-milled vanadium compound, the carbonaceous reducing agent, the binder and the iron powder into a stirring device in sequence for stirring;
step three, adding water into a stirring device, and stirring and mixing the ball-milled vanadium compound, the carbonaceous reducing agent, the binder, the iron powder and the water uniformly;
step four, pressing the raw materials treated in the step three on a rolling ball machine to obtain a pressed blank, and pressing the raw materials into an oval ball on the rolling ball machine to obtain an oval ball blank;
step five, baking and forming the oval ball blank;
and step six, sintering the baked and molded elliptical ball blank at 1200-1800 ℃ in a nitrogen atmosphere to obtain the molded vanadium-nitrogen alloy.
Preferably, in the step one, a crusher is used for crushing the vanadium compound, the rotating speed of the crusher is 1500 rpm-2500 rpm, the crushing time is 30 minutes-45 minutes, and the ball milling time is controlled to be 20 minutes-30 minutes.
Preferably, the stirring time of the stirring device in the second step is controlled to be 15 minutes to 30 minutes.
Preferably, the stirring time of the stirring device in the third step is controlled to be 30 minutes to 60 minutes, and the stirring temperature is normal temperature to 80 ℃ (preferably 50 ℃ to 70 ℃). The stirring temperature is increased to a certain extent, which is more beneficial to uniform mixing and infiltration.
Preferably, in the fourth step, the pressure of the ball rolling machine is controlled to be 50MPa-80MPa, the diameter of the ball blank is controlled to be 20mm-50mm, and the thickness of the ball blank is controlled to be 10mm-30mm.
Preferably, in the fifth step, the baking time is controlled to be 1 hour to 2 hours, and the baking temperature is controlled to be 150 ℃ to 200 ℃.
The beneficial effects of the invention are as follows:
1. according to the invention, water and the binder with specific types and proportions are added during the forming of the vanadium-nitrogen alloy, and the proportion of the binder and the water is reasonably controlled, so that the binder can be fully diffused and deeply enter the activated vanadium compound during mixing, the contact area is increased, the moisture volatilizes after drying, the binder is dried, the vanadium-nitrogen alloy is tightly bound, and the powder is not easy to disperse. Make difficult emergence breakage in the transportation after the ball base shaping, reduce the loss, make intensive mixing between the raw materials more easily when the stirring simultaneously, increase the quality of product output.
2. The raw materials are ground by the ball mill, so that gaps among particles are smaller, the air content of a ball blank is reduced, the adhesive force among spherical particles is increased, the risk of breaking the ball blank is reduced, the loss is reduced, the economic benefit of a factory is improved, and the product yield is increased.
3. The strength of the formed vanadium-nitrogen alloy obtained by the invention is 25-32MPa, and the density is 2.8-3.2g/cm.
In conclusion, the invention can fully mix the raw materials, increase the quality of the product, reduce the risk of ball blank crushing, reduce the loss, improve the economic benefit of a factory, and solve the problems that the existing part of vanadium-nitrogen alloy is easy to crush after being formed during production and manufacturing, causes loss and has higher product manufacturing cost.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments of the present invention, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Example 1
In the forming method of the powdery vanadium-nitrogen alloy of the embodiment, the vanadium-nitrogen alloy comprises the following raw materials in percentage by mass: 60% of vanadium compound, 5% of carbonaceous reducing agent, 5% of binder, 10% of water and 20% of iron powder.
The adhesive is as follows: 20 parts of polyester resin, 10 parts of hydroxyl acrylic resin and 1 part of polycarbonate diol.
The invention adds water to dilute the binder, and reasonably controls the proportion of the binder and the water, so that the binder can be fully diffused and deeply enter the activated vanadium compound during mixing, the contact area is increased, the moisture is volatilized after drying, the binder is dried, the vanadium-nitrogen alloy is tightly bound, and powder scattering is difficult.
The polyester resin is saturated polyester resin, and the number average molecular weight Mn of the polyester resin is 3000. Researches show that the resin with too large number average molecular weight is difficult to permeate into vanadium-nitrogen alloy molecules or among the molecules, which is not beneficial to improving the cohesiveness and the formability; on the contrary, the resin with too small number average molecular weight has insufficient adhesive property, which is not beneficial to the molding of vanadium-nitrogen alloy. Through experiments, the forming performance of the vanadium-nitrogen alloy can be improved by selecting the proper number average molecular weight.
The solid content of the hydroxy acrylic resin is 40 weight percent. The hydroxyl acrylic resin has excellent adhesive force and water resistance on vanadium-nitrogen alloy materials; can improve the forming property, the water resistance and the post-processing stability of the vanadium-nitrogen alloy.
Polycarbonate diol having a number average molecular weight Mn of 1500. The polycarbonate diol is added to the vanadium nitride molding agent, so that the water resistance is mainly improved, and the vanadium nitride is not scattered when meeting water after being molded. Has excellent machinability.
The vanadium compound is vanadium pentoxide.
The carbonaceous reducing agent is graphene.
The forming method of the powdery vanadium-nitrogen alloy of the embodiment comprises the following steps:
crushing a vanadium compound, carrying out ball milling on the crushed vanadium compound until the particle size of the vanadium compound is 80-120 meshes to obtain a ball-milled vanadium compound;
on one hand, the ball milling controls the particle size of the raw materials, on the other hand, the ball milling activates the vanadium compound of the raw materials to increase the contact area with the binder, thus being beneficial to the function of the binder and further being beneficial to the molding of the vanadium-nitrogen alloy.
Step two, adding the ball-milled vanadium compound, the carbonaceous reducing agent, the binder and the iron powder into a stirring device in sequence for stirring;
step three, adding water into a stirring device, and stirring and mixing the ball-milled vanadium compound, the carbonaceous reducing agent, the binder, the iron powder and the water uniformly;
step four, pressing the raw materials treated in the step three on a rolling ball machine to obtain a pressed blank, and pressing the raw materials into an oval ball on the rolling ball machine to obtain an oval ball blank;
step five, baking and forming the oval spherical blank;
and step six, sintering the baked and molded elliptical ball blank at 1500 ℃ in a nitrogen atmosphere to obtain the molded vanadium-nitrogen alloy.
In the first step, a crusher is adopted for crushing the vanadium compound, the rotation speed of the crusher is 1500 rpm, the crushing time is 45 minutes, and the ball milling time is controlled to be 30 minutes.
And the stirring time of the stirring device in the second step is controlled to be 30 minutes.
The stirring time of the stirring device in the third step is controlled to be 60 minutes, and the stirring temperature is 50 ℃. The stirring temperature is increased to a certain extent, which is more beneficial to uniform mixing and infiltration.
In the fourth step, the pressure of the rolling ball machine is controlled at 80Mpa, the diameter of the ball blank is controlled at 20mm, and the thickness of the ball blank is controlled at 10mm.
In the fifth step, the baking time is controlled to be 1 hour, and the baking temperature is controlled to be 200 ℃.
The invention has the beneficial effects that:
1. according to the invention, water and the binding agent with specific type and proportion are added during the forming of the vanadium-nitrogen alloy, and the proportion of the binding agent and the water is reasonably controlled, so that the binding agent can be fully diffused and deeply enter the activated vanadium compound during the mixing, the contact area is increased, the moisture is volatilized after the drying, the binding agent is dried, the vanadium-nitrogen alloy is tightly bound, and the powder scattering is difficult. Make difficult emergence breakage in the transportation after the ball base shaping, reduce the loss, make intensive mixing between the raw materials more easily when the stirring simultaneously, increase the quality of product output.
2. The raw materials are ground through the ball mill, so that gaps among particles are smaller, the air content of ball blanks is reduced, the adhesive force among spherical particles is increased, the risk of ball blank crushing is reduced, the loss is reduced, the economic benefit of a factory is improved, and the product yield is increased.
3. The strength of the formed vanadium-nitrogen alloy obtained in the embodiment is 32MPa, and the density is 3.2g/cm.
Example 2
In the forming method of the powdery vanadium-nitrogen alloy of the embodiment, the vanadium-nitrogen alloy comprises the following raw materials in percentage by mass: 50% of vanadium compound, 3% of carbonaceous reducing agent, 2% of binder, 15% of water and 30% of iron powder.
The adhesive is as follows: 30 parts of polyester resin, 5 parts of hydroxy acrylic resin and 1 part of polycarbonate diol.
The invention adds water to dilute the binder, and reasonably controls the proportion of the binder and the water, so that the binder can be fully diffused and deeply enter the activated vanadium compound during mixing, the contact area is increased, the moisture is volatilized after drying, the binder is dried, the vanadium-nitrogen alloy is tightly bound, and powder scattering is difficult.
The polyester resin is saturated polyester resin and has a number average molecular weight Mn of 5000. Researches show that the resin with too large number average molecular weight is difficult to permeate into vanadium-nitrogen alloy molecules or among the molecules, which is not beneficial to improving the cohesiveness and the formability; on the contrary, the resin with too small number average molecular weight has insufficient adhesive property, which is not beneficial to the molding of vanadium-nitrogen alloy. Through experiments, the forming performance of the vanadium-nitrogen alloy can be improved by selecting a proper number average molecular weight.
The solid content of the hydroxy acrylic resin is 45wt%. The hydroxyl acrylic resin has excellent adhesive force and water resistance on vanadium-nitrogen alloy materials; can improve the forming property, the water resistance and the post-processing stability of the vanadium-nitrogen alloy.
Polycarbonate diol, number average molecular weight Mn 1600. The polycarbonate diol is added to the vanadium nitride molding agent, so that the water resistance is mainly improved, and the vanadium nitride is not scattered when meeting water after being molded. Has excellent machinability.
The vanadium compound is vanadium trioxide.
The carbonaceous reducing agent is graphite.
The forming method of the powdery vanadium-nitrogen alloy of the embodiment comprises the following steps:
crushing and ball-milling a vanadium compound, and ball-milling the vanadium compound until the particle size is 80-120 meshes to obtain the ball-milled vanadium compound;
on one hand, the ball milling is to control the particle size of the raw materials, on the other hand, the ball milling is to activate the vanadium compound of the raw materials to increase the contact area with the binder, which is beneficial to the function of the binder and further beneficial to the molding of the vanadium-nitrogen alloy.
Step two, adding the ball-milled vanadium compound, the carbonaceous reducing agent, the binder and the iron powder into a stirring device in sequence for stirring;
step three, adding water into a stirring device, and stirring and mixing the ball-milled vanadium compound, the carbonaceous reducing agent, the binder, the iron powder and the water uniformly;
step four, pressing the raw materials processed in the step three on a rolling ball machine to form a compact, and pressing the raw materials into an oval sphere on the rolling ball machine to obtain an oval sphere blank;
step five, baking and forming the oval spherical blank;
and step six, sintering the baked and molded elliptical ball blank at 1800 ℃ in a nitrogen atmosphere to obtain the molded vanadium-nitrogen alloy.
And in the first step, a crusher is adopted for crushing the vanadium compound, the rotating speed of the crusher is 2500 rpm, the crushing time is 30 minutes, and the ball milling time is controlled to be 20 minutes.
And the stirring time of the stirring device in the second step is controlled to be 30 minutes.
The stirring time of the stirring device in the third step is controlled to be 60 minutes, and the stirring temperature is normal temperature.
In the fourth step, the pressure of the rolling ball machine is controlled at 80Mpa, the diameter of the ball blank is controlled at 50mm, and the thickness of the ball blank is controlled at 30mm.
In the fifth step, the baking time is controlled to be 2 hours, and the baking temperature is controlled to be 150 ℃.
The invention has the beneficial effects that:
1. according to the invention, water and the binder with specific types and proportions are added during the forming of the vanadium-nitrogen alloy, and the proportion of the binder and the water is reasonably controlled, so that the binder can be fully diffused and deeply enter the activated vanadium compound during mixing, the contact area is increased, the moisture volatilizes after drying, the binder is dried, the vanadium-nitrogen alloy is tightly bound, and the powder is not easy to disperse. Make difficult emergence breakage in the transportation after the ball base shaping, reduce the loss, make intensive mixing between the raw materials more easily when the stirring simultaneously, increase the quality of product output.
2. The raw materials are ground through the ball mill, so that gaps among particles are smaller, the air content of ball blanks is reduced, the adhesive force among spherical particles is increased, the risk of ball blank crushing is reduced, the loss is reduced, the economic benefit of a factory is improved, and the product yield is increased.
3. The strength of the formed vanadium-nitrogen alloy obtained in the embodiment is 25MPa, and the density is 2.8g/cm.
Example 3
A method for forming a powdery vanadium-nitrogen alloy comprises the following raw materials in percentage by mass: 70% of vanadium compound, 3% of carbonaceous reducing agent, 2% of binder, 15% of water and 10% of iron powder.
The adhesive is as follows: 25 parts of polyester resin, 8 parts of hydroxy acrylic resin and 1 part of polycarbonate diol.
The invention adds water to dilute the binder, and reasonably controls the proportion of the binder and the water, so that the binder can be fully diffused and deeply enter the activated vanadium compound during mixing, the contact area is increased, the moisture is volatilized after drying, the binder is dried, the vanadium-nitrogen alloy is tightly bound, and powder scattering is difficult.
The polyester resin is saturated polyester resin and has a number average molecular weight Mn of 4000. Researches show that the resin with too large number average molecular weight is difficult to permeate into vanadium-nitrogen alloy molecules or among the molecules, which is not beneficial to improving the caking property and the forming property of the vanadium-nitrogen alloy; on the contrary, the resin with too small number average molecular weight has insufficient adhesive property, which is not beneficial to the molding of vanadium-nitrogen alloy. Through experiments, the forming performance of the vanadium-nitrogen alloy can be improved by selecting a proper number average molecular weight.
A hydroxyacrylic resin having a solids content of 40% by weight. The hydroxyl acrylic resin has excellent adhesive force and water resistance on vanadium-nitrogen alloy materials; the forming property, the water resistance and the post processing stability of the vanadium-nitrogen alloy can be improved.
Polycarbonate diol having a number average molecular weight Mn of 1600. The polycarbonate diol is added to the vanadium nitride molding agent, so that the water resistance is mainly improved, and the vanadium nitride is not scattered when meeting water after being molded. Has excellent machinability.
The vanadium compound is ammonium metavanadate.
The carbonaceous reducing agent is coke.
The forming method of the powder vanadium-nitrogen alloy of the embodiment includes the following steps:
crushing a vanadium compound, carrying out ball milling on the crushed vanadium compound until the particle size of the vanadium compound is 80-120 meshes to obtain a ball-milled vanadium compound;
on one hand, the ball milling controls the particle size of the raw materials, on the other hand, the ball milling activates the vanadium compound of the raw materials to increase the contact area with the binder, thus being beneficial to the function of the binder and further being beneficial to the molding of the vanadium-nitrogen alloy.
Step two, adding the ball-milled vanadium compound, the carbonaceous reducing agent, the binder and the iron powder into a stirring device in sequence for stirring;
step three, adding water into a stirring device, and stirring and mixing the ball-milled vanadium compound, the carbonaceous reducing agent, the binder, the iron powder and the water uniformly;
step four, pressing the raw materials treated in the step three on a rolling ball machine to obtain a pressed blank, and pressing the raw materials into an oval ball on the rolling ball machine to obtain an oval ball blank;
step five, baking and forming the oval ball blank;
and step six, sintering the baked and molded elliptical ball blank at 1200 ℃ in a nitrogen atmosphere to obtain the molded vanadium-nitrogen alloy.
In the first step, a crusher is adopted for crushing the vanadium compound, the rotating speed of the crusher is 2000 rpm, the crushing time is 40 minutes, and the ball milling time is controlled to be 25 minutes.
And the stirring time of the stirring device in the second step is controlled to be 20 minutes.
The stirring time of the stirring device in the third step is controlled to be 40 minutes, and the stirring temperature is 50 ℃. The stirring temperature is increased to a certain extent, which is more beneficial to uniform mixing and infiltration.
In the fourth step, the pressure of the rolling ball machine is controlled at 60Mpa, the diameter of the ball blank is controlled at 30mm, and the thickness of the ball blank is controlled at 20mm.
In the fifth step, the baking time is controlled to be 2 hours, and the baking temperature is controlled to be 200 ℃.
The beneficial effects of the invention are as follows:
1. according to the invention, water and the binder with specific types and proportions are added during the forming of the vanadium-nitrogen alloy, and the proportion of the binder and the water is reasonably controlled, so that the binder can be fully diffused and deeply enter the activated vanadium compound during mixing, the contact area is increased, the moisture volatilizes after drying, the binder is dried, the vanadium-nitrogen alloy is tightly bound, and the powder is not easy to disperse. Make difficult emergence breakage in the transportation after the ball base shaping, reduce the loss, make intensive mixing between the raw materials more easily when the stirring simultaneously, increase the quality of product output.
2. The raw materials are ground through the ball mill, so that gaps among particles are smaller, the air content of ball blanks is reduced, the adhesive force among spherical particles is increased, the risk of ball blank crushing is reduced, the loss is reduced, the economic benefit of a factory is improved, and the product yield is increased.
3. The strength of the formed vanadium-nitrogen alloy obtained in the embodiment is 30MPa, and the density is 3.0g/cm.
Comparative example 1
The comparative example was conducted under the same operating parameters as example 1, except that the binder was replaced by the same amount of polyvinyl alcohol. The strength of the formed vanadium-nitrogen alloy obtained in the embodiment is 20MPa, and the density is 2.5g/cm.
Comparative example 2
This comparative example has the same operating parameters as example 1, except that no ball milling of the vanadium compound was performed in step one. The strength of the formed vanadium-nitrogen alloy obtained in the embodiment is 22MPa, and the density is 2.6g/cm.
Comparative example 3
The comparative example was carried out under the same operating parameters as example 1, except that no water was added. The strength of the formed vanadium-nitrogen alloy obtained in the embodiment is 21MPa, and the density is 2.4g/cm.

Claims (9)

1. The forming method of the powdery vanadium-nitrogen alloy is characterized in that the vanadium-nitrogen alloy comprises the following raw materials in percentage by mass: 50% -70% of vanadium compound, 3% -5% of carbonaceous reducing agent, 2% -5% of binder, 10% -15% of water and 10% -30% of iron powder; the sum of the mass percentages of the raw materials is 100%;
the adhesive is as follows: 20-30 parts of polyester resin, 5-10 parts of hydroxy acrylic resin and 1 part of polycarbonate diol;
the forming method of the powdery vanadium-nitrogen alloy comprises the following steps:
crushing a vanadium compound, carrying out ball milling on the crushed vanadium compound until the particle size of the vanadium compound is 80-120 meshes to obtain a ball-milled vanadium compound;
step two, adding the ball-milled vanadium compound, the carbonaceous reducing agent, the binder and the iron powder into a stirring device in sequence for stirring;
step three, adding water into a stirring device, and stirring and mixing the ball-milled vanadium compound, the carbonaceous reducing agent, the binder, the iron powder and the water uniformly;
step four, pressing the raw materials processed in the step three on a rolling ball machine to form a compact, and pressing the raw materials into an oval sphere on the rolling ball machine to obtain an oval sphere blank;
step five, baking and forming the oval spherical blank;
and step six, sintering the baked and molded oval ball blank at 1200-1800 ℃ in a nitrogen atmosphere to obtain the molded vanadium-nitrogen alloy.
2. The method for molding a powdery vanadium-nitrogen alloy according to claim 1, wherein the polyester resin is a saturated polyester resin and has a number average molecular weight Mn of 3000 to 5000.
3. The method for molding the powdery vanadium-nitrogen alloy as claimed in claim 1 or 2, wherein the solid content of the hydroxy acrylic resin is 40 to 45wt%.
4. The method for molding the powdery vanadium-nitrogen alloy as claimed in claim 1 or 2, wherein the polycarbonate diol has a number average molecular weight Mn of 1500 to 1600.
5. The method for molding the vanadium-nitrogen alloy powder according to claim 1 or 2, wherein the vanadium compound is at least one of vanadium pentoxide, vanadium trioxide, ammonium metavanadate, sodium metavanadate and potassium metavanadate;
the carbonaceous reducing agent is at least one of graphene, coke and graphite.
6. The method for molding the powdery vanadium-nitrogen alloy as claimed in claim 1, wherein in the step one, a crusher is used for crushing the vanadium compound, the rotation speed of the crusher is 1500 rpm-2500 rpm, the crushing time is 30 minutes-45 minutes, and the ball milling time is controlled to be 20 minutes-30 minutes.
7. The method for molding the powdery vanadium-nitrogen alloy as claimed in claim 1, wherein the stirring time of the stirring device in the second step is controlled to be 15 to 30 minutes;
the stirring time of the stirring device in the third step is controlled to be 30-60 minutes, and the stirring temperature is controlled to be normal temperature-80 ℃.
8. The method for molding the powdery vanadium-nitrogen alloy as claimed in claim 1, wherein in the fourth step, the pressure of a rolling ball machine is controlled to be 50MPa-80MPa, the diameter of a ball blank is controlled to be 20mm-50mm, and the thickness of the ball blank is controlled to be 10mm-30mm.
9. The method for forming the powdery vanadium-nitrogen alloy as claimed in claim 1, wherein in the fifth step, the baking time is controlled to be 1 hour to 2 hours, and the baking temperature is controlled to be 150 ℃ to 200 ℃.
CN202110984328.1A 2021-08-25 2021-08-25 Method for forming powdery vanadium-nitrogen alloy Active CN113718103B (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4604259A (en) * 1983-10-11 1986-08-05 Scm Corporation Process for making copper-rich metal shapes by powder metallurgy
CN103459632A (en) * 2011-04-06 2013-12-18 赫格纳斯公司 Vanadium-containing powder metallurgical powders and methods of their use
WO2015156074A1 (en) * 2014-04-08 2015-10-15 トヨタ自動車株式会社 Nonmagnetic slurry composition and method for producing rare earth magnet
CN111440976A (en) * 2020-05-21 2020-07-24 中冶东方工程技术有限公司 Vanadium-nitrogen alloy and production method thereof

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4604259A (en) * 1983-10-11 1986-08-05 Scm Corporation Process for making copper-rich metal shapes by powder metallurgy
CN103459632A (en) * 2011-04-06 2013-12-18 赫格纳斯公司 Vanadium-containing powder metallurgical powders and methods of their use
WO2015156074A1 (en) * 2014-04-08 2015-10-15 トヨタ自動車株式会社 Nonmagnetic slurry composition and method for producing rare earth magnet
CN111440976A (en) * 2020-05-21 2020-07-24 中冶东方工程技术有限公司 Vanadium-nitrogen alloy and production method thereof

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