CN114783750A - Method for preparing high-performance neodymium-iron-boron-based permanent magnet material - Google Patents
Method for preparing high-performance neodymium-iron-boron-based permanent magnet material Download PDFInfo
- Publication number
- CN114783750A CN114783750A CN202210255686.3A CN202210255686A CN114783750A CN 114783750 A CN114783750 A CN 114783750A CN 202210255686 A CN202210255686 A CN 202210255686A CN 114783750 A CN114783750 A CN 114783750A
- Authority
- CN
- China
- Prior art keywords
- powder
- air duct
- boron
- neodymium
- mixing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/0253—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing permanent magnets
Abstract
The invention belongs to the field of permanent magnet materials, and particularly relates to a method for preparing a high-performance neodymium-iron-boron-based permanent magnet material, which specifically comprises the following steps: s1: preparation 2: 14: 1 proportion of Nd-Fe-B based alloy material Nd27Fe72B1, and preparing to record the burning loss of rare earth Nd as 4% by weight, and then preparing Nd-Fe-B based quick-setting sheets with the thickness of 320 mu m by using a scale ingot casting process; through using the blowing and the rotation of the mixing barrel to carry out the mixing operation on the neodymium iron boron based powder and the Cu60Zn40 powder, the impact of the neodymium iron boron based powder and the Cu60Zn40 powder with the stirring impeller can be reduced, the particle crushing problem of the neodymium iron boron based powder and the Cu60Zn40 powder is reduced when the neodymium iron boron based powder and the Cu60Zn40 powder are fully mixed, and the loss is reduced.
Description
Technical Field
The invention belongs to the field of permanent magnet materials, and particularly relates to a method for preparing a high-performance neodymium-iron-boron-based permanent magnet material.
Background
The neodymium-iron-boron permanent magnet material can be mixed with rubber or bonding materials such as plastics with light hardness and the like, and then directly molded into permanent magnet parts with corresponding shapes according to the requirements of users.
A Chinese patent with publication number CN102543343B discloses a sintered neodymium-iron-boron-based permanent magnet material with high coercivity and high corrosion resistance prepared by doping aluminum nanoparticles and a preparation method thereof, wherein Al nanoparticles with the average particle size of 100-500 nanometers are added into neodymium-iron-boron-based powder with the average particle size of 3-5 microns and mixed uniformly, the adding amount is 0.2-2.5%, and the mixture is oriented and pressed in a magnetic field of 2.5T for molding.
When the neodymium-iron-boron-based permanent magnet material is prepared, neodymium-iron-boron-based powder and Cu80Zn20 powder need to be uniformly mixed, and in long-time use observation, the existing mixing equipment is found to be mixed by adopting a stirring blade and a vibration mode, the mixing mode easily causes damage to the neodymium-iron-boron-based powder and the Cu80Zn20 powder, so that the mixed neodymium-iron-boron-based powder and Cu80Zn20 powder particles have the problem of splitting loss.
Therefore, the invention provides a method for preparing a high-performance neodymium-iron-boron-based permanent magnet material.
Disclosure of Invention
To remedy the deficiencies of the prior art, at least one of the technical problems set forth in the background is addressed.
The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to a method for preparing a high-performance neodymium-iron-boron-based permanent magnet material, which specifically comprises the following steps:
s1: preparation 2: 14: 1 proportion of Nd-Fe-B based alloy material Nd27Fe72B1, and preparing 4% of burning loss of rare earth Nd, and then preparing a neodymium-Fe-B based quick-setting sheet with the thickness of 320 mu m by using a scale ingot casting process;
s2: thereafter, 2: 14: 1, adding 5 wt% of Cu60Zn40 powder into the neodymium iron boron based powder;
s3: the two kinds of powder in S2 are mixed uniformly by using a mixing device, the process places the neodymium-iron-boron-based powder into a mixing cylinder, then places the Cu60Zn40 powder into the mixing cylinder, simultaneously needs to ensure that the height of the two kinds of powder after accumulation does not contact with the bottom of a first air duct, completely extracts the mixed powder after mixing from the inside of the mixing cylinder, then carries out static pressure treatment, and places the pressed compact into a vacuum sintering furnace for heat treatment, thus obtaining the neodymium-iron-boron-based permanent magnet material.
Further, the mixing proposed in S3 is: placing neodymium iron boron-based powder and Cu60Zn40 powder inside a mixing device, driving the neodymium iron boron-based powder and Cu60Zn40 powder inside the mixing device to move and mix through the rotation of the mixing device, and simultaneously connecting the top of the mixing device into a high-pressure gas tank to blow gas inside the mixing device, so that the neodymium iron boron-based powder and the Cu60Zn40 powder inside the mixing device are quickly mixed; when the high-pressure gas tank is used for inflating the interior of the mixing device, gas in the high-pressure gas tank is intermittently blown into the mixing barrel, so that the neodymium-iron-boron-based powder and the Cu60Zn40 powder in the mixing device are mixed more uniformly.
Further, the heat treatment proposed in S3 is: firstly, firing at 1020-1060 ℃ for 1.5-2.5 h, then carrying out heat treatment at 750 ℃ for 2h, and then carrying out heat treatment at 380 ℃ for 2 h.
Further, the mixing apparatus set forth in S3 includes a carrier tray; the top of the bearing plate is rotatably connected with a mixing cylinder; the bottom of the bearing disc is provided with a motor; the bottom of the mixing cylinder is fixedly connected with the output end of the motor; the mixing cylinder is rotatably connected with a first air duct; the middle part of the first air duct, which is positioned in the mixing cylinder, is communicated with a plurality of second air ducts; the middle part of the first air duct is communicated with a support arm; when using, insert first air duct top in high-pressure gas tank bottom, it is rotatory to use the motor to drive mixing drum simultaneously, mixing drum can rotate at bearing the dish top this moment, first air duct can not rotate for bearing the dish simultaneously, the gas of second air duct spun can impact the contact with neodymium iron boron base powder and the Cu60Zn40 powder of the inside different positions department of mixing drum this moment, make inside neodymium iron boron base powder of mixing drum and Cu60Zn40 powder flash mixed, through using the rotation of blowing and mixing drum to carry out mixing operation to neodymium iron boron base powder and Cu60Zn40 powder, reducible neodymium iron boron base powder and Cu60Zn40 powder and impeller's striking, when keeping the intensive mixing of neodymium iron boron base powder and Cu60Zn40 powder, reduce the granule breakage problem of neodymium iron boron base powder and Cu60Zn40 powder, reduce the loss.
Furthermore, the middle part of the second air duct is communicated with a third air duct; the end part of the third air duct is obliquely arranged towards the inner side wall of the mixing drum; through setting up the third air duct of slope in second air duct middle part and blowing to the inside neodymium iron boron base powder of mixing drum and Cu60Zn40 powder, can make the inside neodymium iron boron base powder of mixing drum and the mixture that Cu60Zn40 powder can be faster, can make the inside neodymium iron boron base powder and the Cu60Zn40 powder that flutter from top to bottom of mixing drum can alternately mix simultaneously, promote the degree of consistency of mixture.
Furthermore, a first elastic pull rope is connected between the end part of the second air duct and the end part of the support arm; the middle part of the first elastic pull rope is connected with a counterweight ball; the counterweight ball is positioned at the end part of the third air duct; through be equipped with the counter weight ball between second air duct and support arm, can be when the third air duct is carminative, make the counter weight ball at the inside swing of mixing drum, swing counter weight ball and first elasticity stay cord can drive first air duct and first air duct at the inside swing of mixing drum this moment, just can make the second air duct swing the blowout gas this moment, second air duct spun gas can further blow the mixture to the inside neodymium iron boron base powder of mixing drum and Cu60Zn40 powder, further promote the inside neodymium iron boron base powder of mixing drum and the mixed degree of consistency of Cu60Zn40 powder.
Further, a ribbon is connected to the counterweight ball; through be equipped with the ribbon on the counter weight ball, can be when the jet-propelled of third air duct department, the ribbon swings on the counter weight ball, and the ribbon can contact with the inside wall of mixing drum this moment for neodymium iron boron base powder and the Cu60Zn40 powder of adhesion are swept off on the mixing drum inside wall, reduce on the mixing drum inside wall because of being stained with the waste and the inhomogeneous problem of mixing that have a large amount of neodymium iron boron base powder and Cu60Zn40 powder to lead to.
Further, a second elastic pull rope is arranged between the counterweight ball and the third air duct; one end of the second elastic pull rope is connected with the counterweight ball, and the other end of the second elastic pull rope is connected with the inner side wall of the middle part of the third air duct; through be connected with second elasticity stay cord between counter weight ball and third air duct, can make counter weight ball more stable in the swing of third air duct port, reduce the too far problem of counter weight ball separation from third air duct tip.
Furthermore, an elastic conical block is fixedly connected at the joint of the second elastic pull rope and the counterweight ball; through being equipped with elasticity tapered block in counter weight ball and the elastic stay cord contact position department of second, can be when the third air duct is not jet-propelled, the counter weight ball is pulled down by the elastic stay cord of second, blocks up the port department at the third air duct, reduces neodymium iron boron base powder and Cu60Zn40 powder and enters into the inside problem of third air duct, reduces the risk that the third air duct is blockked up.
Furthermore, the middle part of the second elastic pull rope is connected with a plurality of elastic balls; a plurality of groups of horn-shaped elastic valves are fixedly connected to the inner side wall of the third air duct; the diameter of the elastic ball is larger than that of the port of the trumpet-shaped elastic valve; through being equipped with tubaeform elastic valve in third air duct inside, can be dragged down by second elasticity stay cord at the elastic ball, the elastic ball intermittent type nature with tubaeform elastic valve contact, there is the vibration production this moment, this vibration can be conducted to the counter weight ball this moment on, with the last neodymium iron boron base powder of counter weight ball and Cu60Zn40 powder shake off, reduce because of the excessive neodymium iron boron base powder and the Cu60Zn40 powder on the counter weight ball are stained with the extravagant problem that attaches and lead to.
The invention has the following beneficial effects:
1. according to the method for preparing the high-performance neodymium-iron-boron-based permanent magnet material, the neodymium-iron-boron-based powder and the Cu60Zn40 powder are mixed by blowing and rotation of the mixing drum, so that impact between the neodymium-iron-boron-based powder and the Cu60Zn40 powder and a stirring impeller can be reduced, the problem of particle breakage of the neodymium-iron-boron-based powder and the Cu60Zn40 powder is solved while the neodymium-iron-boron-based powder and the Cu60Zn40 powder are fully mixed, and loss is reduced.
2. According to the method for preparing the high-performance neodymium-iron-boron-based permanent magnet material, the ribbon is arranged on the counterweight ball, when air is injected at the third air duct, the ribbon can swing on the counterweight ball, and at the moment, the ribbon can be in contact with the inner side wall of the mixing cylinder, so that neodymium-iron-boron-based powder and Cu60Zn40 powder adhered to the inner side wall of the mixing cylinder are swept away, and the problems of waste and uneven mixing caused by the fact that a large amount of neodymium-iron-boron-based powder and Cu60Zn40 powder are adhered to the inner side wall of the mixing cylinder are solved.
Drawings
The invention will be further described with reference to the accompanying drawings.
FIG. 1 is a flow chart of a preparation method of the present invention;
FIG. 2 is a schematic perspective view of a mixing drum according to the present invention;
FIG. 3 is a schematic sectional view of the mixing drum of the present invention;
FIG. 4 is a schematic view of the configuration of the airway tube of the present invention;
FIG. 5 is a schematic partial view of a third airway tube according to the invention;
in the figure: 1. a carrier tray; 11. a mixing drum; 12. a motor; 13. a first air duct; 14. a second air duct; 15. a support arm; 2. a third air duct; 3. a first elastic pull rope; 31. a counterweight ball; 4. a streamer; 5. a second elastic pull rope; 6. an elastic conical block; 7. an elastic ball; 71. a trumpet-shaped elastic valve.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
As shown in fig. 1, a method for preparing a high-performance neodymium-iron-boron-based permanent magnet material specifically includes:
s1: preparation 2: 14: 1 proportion of Nd-Fe-B based alloy material Nd27Fe72B1, and preparing 4% of burning loss of rare earth Nd, and then preparing a neodymium-Fe-B based quick-setting sheet with the thickness of 320 mu m by using a scale ingot casting process;
s2: thereafter, 2: 14: 1, adding 5 wt% of Cu60Zn40 powder into the neodymium iron boron based powder;
s3: and (4) uniformly mixing the two powders in the step S2, then carrying out static pressure treatment on the mixed powder, and placing the pressed compact into a vacuum sintering furnace for heat treatment to obtain the neodymium-iron-boron-based permanent magnet material.
The mixing proposed in S3 is: neodymium iron boron-based powder and Cu60Zn40 powder are placed inside mixing equipment, the neodymium iron boron-based powder and the Cu60Zn40 powder inside the mixing equipment are driven to move and mix through rotation of the mixing equipment, and meanwhile, a high-pressure gas tank is connected to the top of the mixing equipment to blow the inside of the mixing equipment, so that the neodymium iron boron-based powder and the Cu60Zn40 powder inside the mixing equipment are quickly mixed; when the high-pressure gas tank is used for inflating the interior of the mixing device, gas in the high-pressure gas tank is intermittently blown into the mixing barrel 11, so that the neodymium-iron-boron-based powder and the Cu60Zn40 powder in the mixing device are mixed more uniformly.
The heat treatment proposed in S3 is: firstly, firing at 1020-1060 ℃ for 1.5-2.5 h, then carrying out heat treatment at 750 ℃ for 2h, and then carrying out heat treatment at 380 ℃ for 2 h.
Example one
As shown in fig. 2 to 4, in the method for preparing a high-performance neodymium-iron-boron-based permanent magnetic material according to the embodiment of the present invention, the mixing apparatus proposed in S3 includes a carrier tray 1; the top of the bearing plate 1 is rotatably connected with a mixing cylinder 11; the bottom of the bearing disc 1 is provided with a motor 12; the bottom of the mixing cylinder 11 is fixedly connected with the output end of the motor 12; the mixing cylinder 11 is rotatably connected with a first air duct 13; the first air duct 13 is communicated with a plurality of second air ducts 14 in the middle of the mixing barrel 11; the middle part of the first air duct 13 is communicated with a support arm 15; when using, insert first air duct 13 top at the high-pressure cylinder bottom, it is rotatory to use motor 12 to drive mixing drum 11 simultaneously, mixing drum 11 can rotate at bearing dish 1 top this moment, first air duct 13 can not rotate for bearing dish 1 simultaneously, the gas of second air duct 14 blowout can strike contact with neodymium iron boron base powder and Cu60Zn40 powder of the inside different positions department of mixing drum 11 this moment, make neodymium iron boron base powder and the quick mixing of Cu60Zn40 powder of mixing drum 11 inside, through using blowing and the rotation of mixing drum 11 to carry out mixing operation to neodymium iron boron base powder and Cu60Zn40 powder, reducible neodymium iron boron base powder and the striking of Cu60Zn40 powder and impeller, when keeping the intensive mixing of neodymium iron boron base powder and Cu60Zn40 powder, reduce the granule breakage problem of neodymium iron boron base powder and Cu60Zn40 powder, reduce the loss.
The middle part of the second air duct 14 is communicated with a third air duct 2; the end part of the third air duct 2 is obliquely arranged towards the inner side wall of the mixing drum 11; through setting up the third air duct 2 of slope in second air duct 14 middle part to blow to 11 inside neodymium iron boron base powder of mixing drum and Cu60Zn40 powder, can make 11 inside neodymium iron boron base powder of mixing drum and the mixture that Cu60Zn40 powder can be faster, can make 11 inside neodymium iron boron base powder and the cross mixing of Cu60Zn40 powder that flutter from top to bottom of mixing drum 11 simultaneously, promote the degree of consistency of mixture.
A first elastic pull rope 3 is connected between the end part of the second air duct 14 and the end part of the support arm 15; the middle part of the first elastic pull rope 3 is connected with a counterweight ball 31; the counterweight ball 31 is positioned at the end part of the third air duct 2; through being equipped with counter weight ball 31 between second air duct 14 and support arm 15, can be when the exhaust of third air duct 2, make counter weight ball 31 swing in mixing drum 11 is inside, swing counter weight ball 31 and first elasticity stay cord 3 can drive first air duct 13 and first air duct 13 at the inside swing of mixing drum 11 this moment, just can make second air duct 14 swing ejection gas this moment, the gas of second air duct 14 spun can further blow gas mixing to the inside neodymium iron boron base powder of mixing drum 11 and Cu60Zn40 powder, further promote the inside neodymium iron boron base powder of mixing drum 11 and the mixed degree of consistency of Cu60Zn40 powder.
The weight-balancing ball 31 is connected with a ribbon 4; through being equipped with ribbon 4 on counter weight ball 31, can be when the jet-propelled of third air duct 2 department, ribbon 4 swings on counter weight ball 31, and ribbon 4 can contact with the inside wall of mixing drum 11 this moment for neodymium iron boron base powder and the powder of Cu60Zn40 of adhesion are swept off on the inside wall of mixing drum 11, reduce waste and the inhomogeneous problem of mixing that is caused because of being stained with a large amount of neodymium iron boron base powder and the powder of Cu60Zn40 of attaching on the inside wall of mixing drum 11.
Example two
As shown in fig. 5, a first comparative example, in which another embodiment of the present invention is: a second elastic pull rope 5 is arranged between the counterweight ball 31 and the third air duct 2; one end of the second elastic pull rope 5 is connected with the counterweight ball 31, and the other end of the second elastic pull rope is connected with the inner side wall of the middle part of the third air duct 2; through be connected with second elasticity stay cord 5 between counter weight ball 31 and third air duct 2, can make counter weight ball 31 more stable at the swing of third air duct 2 port, reduce counter weight ball 31 and break away from the too far problem of third air duct 2 tip.
An elastic conical block 6 is fixedly connected with the joint of the second elastic pull rope 5 and the counterweight ball 31; through being equipped with elastic taper piece 6 in counter weight ball 31 and the 5 contact position departments of second elasticity stay cord, can not jet-propelled time at third air duct 2, counter weight ball 31 is pulled down by second elasticity stay cord 5, blocks up at the port department of third air duct 2, reduces neodymium iron boron base powder and Cu60Zn40 powder and enters into the inside problem of third air duct 2, reduces the risk that third air duct 2 is blockked up.
The middle part of the second elastic pull rope 5 is connected with a plurality of elastic balls 7; a plurality of groups of horn-shaped elastic valves 71 are fixedly connected with the inner side wall of the third air duct 2; the diameter of the elastic ball 7 is larger than the diameter of the port of the trumpet-shaped elastic valve 71; through being equipped with tubaeform elastic valve 71 in third air duct 2 inside, can be pulled down by second elasticity stay cord 5 at elastic ball 7, elastic ball 7 intermittent type nature and tubaeform elastic valve 71 contact, there is the vibration production this moment, this vibration can be conducted to counterweight ball 31 at this moment, shakes off neodymium iron boron base powder and Cu60Zn40 powder on counterweight ball 31, reduces because of excessive neodymium iron boron base powder and the extravagant problem that Cu60Zn40 powder was stained with and is adhered to and lead to on counterweight ball 31.
During operation, insert first air duct 13 top in high-pressure gas tank bottom, it is rotatory to use motor 12 to drive mixing drum 11 simultaneously, mixing drum 11 can rotate at bearing dish 1 top this moment, first air duct 13 can not rotate for bearing dish 1 simultaneously, the gas of second air duct 14 spun this moment can impact the contact with neodymium iron boron base powder and Cu60Zn40 powder of mixing drum 11 inside different positions department, make the inside neodymium iron boron base powder of mixing drum 11 and Cu60Zn40 powder rapid mixing, through using the rotation of blowing and mixing drum 11 to carry out mixing operation to neodymium iron boron base powder and Cu60Zn40 powder, reducible neodymium iron boron base powder and Cu60Zn40 powder and impeller's striking, when keeping the intensive mixing of neodymium iron boron base powder and Cu60Zn40 powder, reduce the granule breakage problem of neodymium iron boron base powder and Cu60Zn40 powder, reduce the loss.
The inclined third air duct 2 is arranged in the middle of the second air duct 14 to blow the neodymium iron boron based powder and the Cu60Zn40 powder in the mixing drum 11, so that the neodymium iron boron based powder and the Cu60Zn40 powder in the mixing drum 11 can be mixed more quickly, the neodymium iron boron based powder and the Cu60Zn40 powder which float up and down in the mixing drum 11 can be mixed in a crossed manner, and the mixing uniformity is improved; through being equipped with counter weight ball 31 between second air duct 14 and support arm 15, can be when the exhaust of third air duct 2, make counter weight ball 31 swing in mixing cylinder 11 inside, swing counter weight ball 31 and first elasticity stay cord 3 at this moment can drive first air duct 13 and swing in mixing cylinder 11 inside, just so that second air duct 14 is swinging the blowout gas at this moment, the gas that second air duct 14 squirted at this moment can further blow gas and mix the neodymium iron boron base powder and Cu60Zn40 powder inside mixing cylinder 11, further promote neodymium iron boron base powder and the mixed degree of consistency of Cu60Zn40 powder inside mixing cylinder 11; through being equipped with ribbon 4 on counter weight ball 31, can be when the jet-propelled of third air duct 2 department, ribbon 4 swings on counter weight ball 31, and ribbon 4 can contact with the inside wall of mixing drum 11 this moment for neodymium iron boron base powder and the powder of Cu60Zn40 of adhesion are swept off on the inside wall of mixing drum 11, reduce waste and the inhomogeneous problem of mixing that is caused because of being stained with a large amount of neodymium iron boron base powder and the powder of Cu60Zn40 of attaching on the inside wall of mixing drum 11.
The second elastic pull rope 5 is connected between the counterweight ball 31 and the third air duct 2, so that the counterweight ball 31 can swing more stably at the port of the third air duct 2, and the problem that the counterweight ball 31 is separated from the end part of the third air duct 2 too far is solved; through being equipped with elastic taper piece 6 in counter weight ball 31 and the 5 contact position departments of second elasticity stay cord, can not jet-propelled time at third air duct 2, counter weight ball 31 is pulled down by second elasticity stay cord 5, blocks up at the port department of third air duct 2, reduces neodymium iron boron base powder and Cu60Zn40 powder and enters into the inside problem of third air duct 2, reduces the risk that third air duct 2 is blockked up. Through being equipped with tubaeform elastic valve 71 in third air duct 2 inside, can be in elastic ball 7 pulled down by second elastic cord 5, elastic ball 7 intermittent type nature with tubaeform elastic valve 71 contact, there is the vibration production this moment, this vibration can be conducted to counterweight ball 31 at this moment, shake off counterweight ball 31 goes up neodymium iron boron base powder and Cu60Zn40 powder, reduce because of excessive neodymium iron boron base powder and the extravagant problem that Cu60Zn40 powder is stained with and attaches the result in on the counterweight ball 31.
The front, the back, the left, the right, the upper and the lower are all based on figure 1 in the attached drawings of the specification, according to the standard of the observation angle of a person, the side of the device facing an observer is defined as the front, the left side of the observer is defined as the left, and the like.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplifying the description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the scope of the present invention.
The foregoing shows and describes the general principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. A method for preparing a high-performance neodymium-iron-boron-based permanent magnet material is characterized by comprising the following steps: the preparation method of the high-performance neodymium-iron-boron-based permanent magnet material specifically comprises the following steps:
s1: preparation 2: 14: 1 proportion of Nd-Fe-B based alloy material Nd27Fe72B1, and preparing to record the burning loss of rare earth Nd as 4% by weight, and then preparing Nd-Fe-B based quick-setting sheets with the thickness of 320 mu m by using a scale ingot casting process;
s2: thereafter, 2: 14: 1, adding 5 wt% of Cu60Zn40 powder into the neodymium iron boron based powder;
s3: the two kinds of powder in S2 use mixing apparatus misce bene, inside neodymium iron boron base powder was placed to mixing drum (11) earlier to this process, place inside mixing drum (11) with Cu60Zn40 powder afterwards, need make the height that two kinds of powders pile up can not contact with first air duct (13) bottom simultaneously, mixed powder after will mixing the completion takes out from mixing drum (11) inside completely, then carries out the static pressure and handles, will press the compact blank and put into vacuum sintering stove and carry out heat treatment, can obtain neodymium-iron-boron base permanent magnet material.
2. The method for preparing the high-performance neodymium-iron-boron-based permanent magnet material according to claim 1, wherein the method comprises the following steps: the blending proposed in S3 is: placing neodymium iron boron base powder and Cu60Zn40 powder inside the mixing apparatus, the rotation through this mixing apparatus drives its inside neodymium iron boron base powder and the removal of Cu60Zn40 powder and mixes, inserts high-pressure gas pitcher with the mixing apparatus top simultaneously and blows to the mixing apparatus inside for the inside neodymium iron boron base powder of mixing apparatus and the quick mixture of Cu60Zn40 powder.
3. The method for preparing high-performance neodymium-iron-boron-based permanent magnet material according to claim 1, wherein: the heat treatment proposed in S3 is: firstly, the raw materials are fired at the temperature of 1020-1060 ℃ for 1.5-2.5 h, then are thermally treated at the environment of 750 ℃ for 2h, and then are thermally treated at the environment of 380 ℃ for 2 h.
4. The method for preparing the high-performance neodymium-iron-boron-based permanent magnet material according to claim 3, wherein the method comprises the following steps: the mixing device proposed in S3 includes a carrier tray (1); the top of the bearing plate (1) is rotationally connected with a mixing cylinder (11); the bottom of the bearing disc (1) is provided with a motor (12); the bottom of the mixing cylinder (11) is fixedly connected with the output end of the motor (12); the mixing cylinder (11) is rotatably connected with a first air duct (13); the first air duct (13) is communicated with a plurality of second air ducts (14) in the middle of the interior of the mixing barrel (11); the middle part of the first air duct (13) is communicated with a support arm (15).
5. The method for preparing the high-performance neodymium-iron-boron-based permanent magnet material according to claim 4, wherein the method comprises the following steps: the middle part of the second air duct (14) is communicated with a third air duct (2); the end part of the third air duct (2) is obliquely arranged towards the inner side wall of the mixing cylinder (11).
6. The method for preparing high-performance neodymium-iron-boron-based permanent magnet material according to claim 5, wherein the steps of: a first elastic pull rope (3) is connected between the end part of the second air duct (14) and the end part of the support arm (15); the middle part of the first elastic pull rope (3) is connected with a counterweight ball (31); the counterweight ball (31) is positioned at the end part of the third air duct (2).
7. The method for preparing high-performance neodymium-iron-boron-based permanent magnet material according to claim 6, wherein: the counterweight ball (31) is connected with a ribbon (4).
8. The method for preparing high-performance neodymium-iron-boron-based permanent magnet material according to claim 7, wherein: a second elastic pull rope (5) is arranged between the counterweight ball (31) and the third air duct (2); one end of the second elastic pull rope (5) is connected with the counterweight ball (31), and the other end of the second elastic pull rope is connected with the inner side wall of the middle part of the third air duct (2).
9. The method for preparing the high-performance neodymium-iron-boron-based permanent magnet material according to claim 8, wherein the method comprises the following steps: an elastic conical block (6) is fixedly connected with the joint of the second elastic pull rope (5) and the counterweight ball (31).
10. The method for preparing high-performance neodymium-iron-boron-based permanent magnet material according to claim 9, wherein: the middle part of the second elastic pull rope (5) is connected with a plurality of elastic balls (7); a plurality of groups of horn-shaped elastic valves (71) are fixedly connected with the inner side wall of the third air duct (2); the diameter of the elastic ball (7) is larger than the diameter of the port of the trumpet-shaped elastic valve (71).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210255686.3A CN114783750B (en) | 2022-03-15 | 2022-03-15 | Method for preparing high-performance neodymium-iron-boron-based permanent magnet material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210255686.3A CN114783750B (en) | 2022-03-15 | 2022-03-15 | Method for preparing high-performance neodymium-iron-boron-based permanent magnet material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114783750A true CN114783750A (en) | 2022-07-22 |
| CN114783750B CN114783750B (en) | 2023-09-29 |
Family
ID=82424580
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210255686.3A Active CN114783750B (en) | 2022-03-15 | 2022-03-15 | Method for preparing high-performance neodymium-iron-boron-based permanent magnet material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114783750B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030217620A1 (en) * | 2002-04-08 | 2003-11-27 | Council Scientific And Industrial Research | Process for the production of neodymium-iron-boron permanent magnet alloy powder |
| CN102568809A (en) * | 2012-03-01 | 2012-07-11 | 烟台正海磁性材料股份有限公司 | Method for preparing corrosion-resistant high-performance sintered neodymium iron boron magnets |
| CN103106993A (en) * | 2012-12-31 | 2013-05-15 | 辽宁恒德磁业有限公司 | Ndfeb magnetic material with light rare earth element and preparation method thereof |
| CN103559972A (en) * | 2013-11-13 | 2014-02-05 | 北京科技大学 | Preparation method for sintered Nd-Fe-B permanent-magnet material |
| CN103680919A (en) * | 2013-12-13 | 2014-03-26 | 北京科技大学 | Method for preparing high-coercivity, high-toughness and high-corrosion-resistance sintered Nd-Fe-B permanent magnet |
| CN107316727A (en) * | 2017-07-06 | 2017-11-03 | 京磁材料科技股份有限公司 | A kind of sintered NdFeB preparation method |
-
2022
- 2022-03-15 CN CN202210255686.3A patent/CN114783750B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030217620A1 (en) * | 2002-04-08 | 2003-11-27 | Council Scientific And Industrial Research | Process for the production of neodymium-iron-boron permanent magnet alloy powder |
| CN102568809A (en) * | 2012-03-01 | 2012-07-11 | 烟台正海磁性材料股份有限公司 | Method for preparing corrosion-resistant high-performance sintered neodymium iron boron magnets |
| CN103106993A (en) * | 2012-12-31 | 2013-05-15 | 辽宁恒德磁业有限公司 | Ndfeb magnetic material with light rare earth element and preparation method thereof |
| CN103559972A (en) * | 2013-11-13 | 2014-02-05 | 北京科技大学 | Preparation method for sintered Nd-Fe-B permanent-magnet material |
| CN103680919A (en) * | 2013-12-13 | 2014-03-26 | 北京科技大学 | Method for preparing high-coercivity, high-toughness and high-corrosion-resistance sintered Nd-Fe-B permanent magnet |
| CN107316727A (en) * | 2017-07-06 | 2017-11-03 | 京磁材料科技股份有限公司 | A kind of sintered NdFeB preparation method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114783750B (en) | 2023-09-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN209275690U (en) | A kind of transmission device adding powder at regular time and quantity | |
| CN114367369B (en) | Grinding device is smashed to graphite for lithium cell production | |
| CN114783750A (en) | Method for preparing high-performance neodymium-iron-boron-based permanent magnet material | |
| CN207103846U (en) | A kind of rotary hydrogen crushing furnace with cooling device | |
| CN106504838A (en) | A kind of preparation method of neodymium iron boron magnetic body | |
| CN217850538U (en) | Meat glossy ganoderma is cultivated and uses matrix mixing device | |
| CN109591212B (en) | Production process of insulating workpiece | |
| CN205660132U (en) | Vacuum melting rapid hardening stove of production melt -spun piece | |
| CN212862892U (en) | Feeding mechanism of concrete sprayer | |
| CN211359029U (en) | Zinc oxide grinding device | |
| CN212215792U (en) | Iron bar powder process jet mill | |
| CN211612932U (en) | Horizontal ball mill is used in diamond miropowder production | |
| CN210522318U (en) | Compounding device that ceramic manufacture line was used | |
| CN210752849U (en) | Dry-method sand making production line | |
| CN108970775A (en) | A kind of projectile impacting type rubble sand making machine | |
| CN209034234U (en) | Oscillating mode forage compounding device | |
| CN207641600U (en) | One kind being suitable for suspending agent class pesticide shear | |
| CN115424845A (en) | High-abundance rare earth permanent magnetic material and preparation method thereof | |
| CN218369583U (en) | Crashproof industrial chemicals storage jar | |
| CN212731986U (en) | Sintered neodymium iron boron powder stirring and sieving integrated device | |
| CN216996380U (en) | Automatic feeding device for artificial stone processing | |
| CN111018373B (en) | Energy-saving green environment-friendly material coagulant for regenerating ardealite solid waste and preparation method thereof | |
| CN213595452U (en) | Novel automatic mixing and weighing device for powder | |
| CN216096387U (en) | High-efficiency feeding device of neodymium iron boron magnetic field forming press | |
| CN219297698U (en) | Drawing cylinder for simultaneously drawing multiple crystal bars by using crystal material |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |