CN110098026A - A kind of preparation method of rare-earth permanent magnet - Google Patents
A kind of preparation method of rare-earth permanent magnet Download PDFInfo
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- CN110098026A CN110098026A CN201810080708.0A CN201810080708A CN110098026A CN 110098026 A CN110098026 A CN 110098026A CN 201810080708 A CN201810080708 A CN 201810080708A CN 110098026 A CN110098026 A CN 110098026A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
- H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
- H01F1/047—Alloys characterised by their composition
- H01F1/053—Alloys characterised by their composition containing rare earth metals
- H01F1/055—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
- H01F1/0555—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 pressed, sintered or bonded together
- H01F1/0558—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 pressed, sintered or bonded together bonded together
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
- H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
- H01F1/047—Alloys characterised by their composition
- H01F1/053—Alloys characterised by their composition containing rare earth metals
- H01F1/055—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
- H01F1/057—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
- H01F1/0571—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes
- H01F1/0575—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes pressed, sintered or bonded together
- H01F1/0578—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes pressed, sintered or bonded together bonded together
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- 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
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- 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
- H01F41/026—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 protecting methods against environmental influences, e.g. oxygen, by surface treatment
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- 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
- H01F41/0266—Moulding; Pressing
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Abstract
The invention discloses a kind of rare-earth permanent magnets, including (by mass percentage): No.1 magnetic powder 20-50%, No. two magnetic powder 30-50%, diadust 5-10%, environmentally friendly ambrose alloy nickel 1-4%.The invention also discloses a kind of preparation method of rare-earth permanent magnet, which comprises the steps of: step 1: production No.1 magnetic powder, step 2: production No.1 magnetic powder, step 3: raw material is weighed, step 4: mixing, step 5: molded blank, step 6: hot pressing.The present invention improves the magnetic energy product of rare-earth permanent magnet, heat resistance with higher by the way of No.1 magnetic powder and No. two magnetic powder mixing, reliable coercitive performance, cost is relatively low, and magnetic energy product is moderate, improves the intensity and surface hardness of rare-earth permanent magnet, rare-earth permanent magnet is hardly damaged, surface not cracky, and the surface of rare-earth permanent magnet is coated with environmentally friendly ambrose alloy nickel layer, it is both environmentally friendly, the corrosion resistance of rare-earth permanent magnet is strengthened again, is suitble to promote.
Description
Technical field
The present invention relates to rare-earth permanent magnet preparation method field, specially a kind of preparation method of rare-earth permanent magnet.
Background technique
Rare earth family is 15 elements from group of the lanthanides, in addition with the scandium and yttrium of group of the lanthanides related intimate totally 17 kinds of elements.It
Be: lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, scandium, yttrium.The maximum user of neodymium metal is neodymium
Iron B permanent magnetic material.The appearance of Nd-Fe-B permanent magnet is filled with new life and vigor for Xitu Hi-Tech skill field.Neodymium-iron-boron
Body magnetic energy product is high, is referred to as contemporary " king of permanent magnetism ", is widely used in the industries such as electronics, machinery with its excellent performance, existing
Rare-earth permanent magnet is still incomplete in preparation method and selection, and existing rare-earth permanent magnet is caused to be easy to appear broken, surface
Damaged, magnetic decline, the more low drawback of heat resistance, it is proposed to this end that a kind of preparation method of rare-earth permanent magnet is above-mentioned to solve
Drawback.
Existing technical literature: [Chinese invention] CN104112580A
[Chinese invention] CN105551791A
[Chinese invention] CN1381851A
[Chinese invention] CN107039168A
Summary of the invention
The purpose of the present invention is to provide a kind of preparation methods of rare-earth permanent magnet, to solve to propose in above-mentioned background technique
The problem of.
To achieve the above object, the invention provides the following technical scheme: a kind of rare-earth permanent magnet, including (quality percentage is pressed
Than meter): No.1 magnetic powder 20-50%, No. two magnetic powder 30-50%, diadust 5-10%, environmentally friendly ambrose alloy nickel 1-4%, surplus are
Binder metal powder.
Preferably, the No.1 magnetic powder is by (by mass percentage): Sm2Co17 30-70% and SmCo530-70% group
At.
Preferably, No. two magnetic powders are by (by mass percentage): Agglutinate neodymium-iron-boron 40-60% and neodymium iron boron 40-
60% composition.
Preferably, the binder metal powder is ethylene acrylic acid co polymer.
Preferably, the rare-earth permanent magnet includes (by mass percentage): 50%, No. two magnetic powder 30% of No.1 magnetic powder,
Diadust 10%, environmentally friendly ambrose alloy nickel 4%, surplus is binder metal powder.
Preferably, the rare-earth permanent magnet includes (by mass percentage): 48%, No. two magnetic powder 36% of No.1 magnetic powder,
Diadust 8%, environmentally friendly ambrose alloy nickel 2%, surplus is binder metal powder.
Preferably, the rare-earth permanent magnet includes (by mass percentage): 40%, No. two magnetic powder 45% of No.1 magnetic powder,
Diadust 6%, environmentally friendly ambrose alloy nickel 3%, surplus is binder metal powder.
Preferably, the rare-earth permanent magnet includes (by mass percentage): 32%, No. two magnetic powder 50% of No.1 magnetic powder,
Diadust 10%, environmentally friendly ambrose alloy nickel 2%, surplus is binder metal powder.
A kind of a kind of preparation method of rare-earth permanent magnet as described above, the preparation method comprise the steps of:
Step 1: production No.1 magnetic powder, (by mass percentage) takes Sm2Co17 30-70% and SmCo530-70%,
It is mixed in glass or plastic vessel, is stirred 3-10 minutes using stirring rod made of glass or plastics, be made one
It is stored after number magnetic powder spare；
Step 2: production No.1 magnetic powder, (by mass percentage) takes Agglutinate neodymium-iron-boron 40-60% and neodymium iron boron 40-
60%, it is mixed in glass or plastic vessel, is stirred 3-10 minutes using stirring rod made of glass or plastics, system
It is spare at being stored after No. two magnetic powders；
Step 3: weighing raw material, weighs raw material according to above-mentioned mass percent, and store respectively spare；
Step 4: prepared No.1 magnetic powder, No. two magnetic powders, diadust and metal powder binder are pressed in mixing
Aforementioned proportion mixed rolling, when rolling, one or more groups of rolls can be used to roll, and roll 10-60 minutes；
Step 5: molded blank, No.1 magnetic powder, No. two magnetic powders, diadust and the metal powder rolled by roll
Adhesive obtains preform；
Step 6: preform is heated to 500-900 degrees Celsius, and carried out under the pressure of 80-300MPa by hot pressing
Hot pressing 10-40 minutes, obtain the crude product blank of rare-earth permanent magnet；
Step 7: surface passivation plates environmentally friendly ambrose alloy nickel layer in crude product blank surface, so that rare-earth permanent magnet is with higher
Corrosion resistance；
Step 8, finished product, at this point, obtaining the finished product of rare-earth permanent magnet.
Compared with prior art, the beneficial effects of the present invention are: the present invention uses No.1 magnetic powder and No. two using the present invention
The mode of magnetic powder mixing, improves the magnetic energy product of rare-earth permanent magnet, heat resistance with higher, reliable coercitive performance,
Cost is relatively low, and magnetic energy product is moderate, and after No.1 magnetic powder and No. two magnetic powder doped diamond micro mists and binder metal powder mixing
Hot pressing forms after rolling, improves the intensity and surface hardness of rare-earth permanent magnet, and rare-earth permanent magnet is hardly damaged, and surface is not fragile
Damage, and the surface of rare-earth permanent magnet is coated with environmentally friendly ambrose alloy nickel layer, it is not only environmentally friendly, but also the corrosion resistance of rare-earth permanent magnet is strengthened,
It is suitble to promote.
Specific embodiment
The technical scheme in the embodiments of the invention will be clearly and completely described below, it is clear that described implementation
Example is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is common
Technical staff's every other embodiment obtained without making creative work belongs to the model that the present invention protects
It encloses.
Embodiment one
The present invention provides a kind of technical solution: a kind of rare-earth permanent magnet, including (by mass percentage): No.1 magnetic powder
50%, No. two magnetic powders 30%, diadust 10%, environmentally friendly ambrose alloy nickel 4%, surplus is binder metal powder.
No.1 magnetic powder is by (by mass percentage): Sm2Co17 50% and SmCo5 50% is formed, wherein Sm2Co17
(SmCo) is second generation rare earth permanent-magnetic material, and SmCo5 (SmCo) is first generation rare earth permanent-magnetic material, and the two mixing has magnetic energy product
Moderate, cost is relatively low, and reliable coercitive performance, compared with neodymium iron boron, SmCo is more suitable for work in the high temperature environment, has
Higher heat resistance.
No. two magnetic powders are by (by mass percentage): Agglutinate neodymium-iron-boron 50% and neodymium iron boron 50% form, and bond neodymium
Iron boron all directions are all magnetic, corrosion-resistant, and Agglutinate neodymium-iron-boron and neodymium iron boron are mixed, so that rare-earth permanent magnet is corrosion-resistant
And magnetic aspect suffers from one and qualitatively improves.
The binder metal powder is ethylene acrylic acid co polymer, is a kind of poly- with thermoplasticity and high cementability
Close object, the bonding and molding that can be used between No.1 magnetic powder and No. two magnetic powders.
A kind of a kind of preparation method of rare-earth permanent magnet as described above, the preparation method comprise the steps of:
Step 1: production No.1 magnetic powder, (by mass percentage) takes Sm2Co17 50% and SmCo5 50%, in glass
Or be mixed in plastic vessel, it is stirred 10 minutes using stirring rod made of glass or plastics, after No.1 magnetic powder is made
It stores spare；
Step 2: production No.1 magnetic powder, (by mass percentage) takes Agglutinate neodymium-iron-boron 50% and neodymium iron boron 50%, in glass
It is mixed in glass or plastic vessel, is stirred 10 minutes using stirring rod made of glass or plastics, No. two magnetic powders are made
After store it is spare；
Step 3: weighing raw material, weighs raw material according to above-mentioned mass percent, and store respectively spare；
Step 4: prepared No.1 magnetic powder, No. two magnetic powders, diadust and metal powder binder are pressed in mixing
Aforementioned proportion mixed rolling is rolled using four groups of rolls when rolling, is rolled 60 minutes；
Step 5: molded blank, No.1 magnetic powder, No. two magnetic powders, diadust and the metal powder rolled by roll
Adhesive obtains preform；
Step 6: preform is heated to 900 degrees Celsius by hot pressing, and hot pressing 40 is carried out under the pressure of 300MPa
Minute, obtain the crude product blank of rare-earth permanent magnet；
Step 7: surface passivation plates environmentally friendly ambrose alloy nickel layer in crude product blank surface, so that rare-earth permanent magnet is with higher
Corrosion resistance；
Step 8, finished product, at this point, obtaining the finished product of rare-earth permanent magnet.
Embodiment two
The present invention provides a kind of technical solution: a kind of rare-earth permanent magnet, including (by mass percentage): No.1 magnetic powder
40%, No. two magnetic powders 42%, diadust 8%, environmentally friendly ambrose alloy nickel 4%, surplus is binder metal powder.
No.1 magnetic powder is by (by mass percentage): Sm2Co17 60% and SmCo5 40% is formed, wherein Sm2Co17
(SmCo) is second generation rare earth permanent-magnetic material, and SmCo5 (SmCo) is first generation rare earth permanent-magnetic material, and the two mixing has magnetic energy product
Moderate, cost is relatively low, and reliable coercitive performance, compared with neodymium iron boron, SmCo is more suitable for work in the high temperature environment, has
Higher heat resistance.
No. two magnetic powders are by (by mass percentage): Agglutinate neodymium-iron-boron 60% and neodymium iron boron 40% form, and bond neodymium
Iron boron all directions are all magnetic, corrosion-resistant, and Agglutinate neodymium-iron-boron and neodymium iron boron are mixed, so that rare-earth permanent magnet is corrosion-resistant
And magnetic aspect suffers from one and qualitatively improves.
The binder metal powder is ethylene acrylic acid co polymer, is a kind of poly- with thermoplasticity and high cementability
Close object, the bonding and molding that can be used between No.1 magnetic powder and No. two magnetic powders.
A kind of a kind of preparation method of rare-earth permanent magnet as described above, the preparation method comprise the steps of:
Step 1: production No.1 magnetic powder, (by mass percentage) takes Sm2Co17 60% and SmCo5 40%, in glass
Or be mixed in plastic vessel, it is stirred 8 minutes using stirring rod made of glass or plastics, is deposited after No.1 magnetic powder is made
Deposit is used；
Step 2: production No.1 magnetic powder, (by mass percentage) takes Agglutinate neodymium-iron-boron 60% and neodymium iron boron 40%, in glass
It is mixed, is stirred 8 minutes using stirring rod made of glass or plastics, after No. two magnetic powders are made in glass or plastic vessel
It stores spare；
Step 3: weighing raw material, weighs raw material according to above-mentioned mass percent, and store respectively spare；
Step 4: prepared No.1 magnetic powder, No. two magnetic powders, diadust and metal powder binder are pressed in mixing
Aforementioned proportion mixed rolling is rolled using three groups of rolls when rolling, is rolled 50 minutes；
Step 5: molded blank, No.1 magnetic powder, No. two magnetic powders, diadust and the metal powder rolled by roll
Adhesive obtains preform；
Step 6: preform is heated to 750 degrees Celsius by hot pressing, and hot pressing 30 is carried out under the pressure of 200MPa
Minute, obtain the crude product blank of rare-earth permanent magnet；
Step 7: surface passivation plates environmentally friendly ambrose alloy nickel layer in crude product blank surface, so that rare-earth permanent magnet is with higher
Corrosion resistance；
Step 8, finished product, at this point, obtaining the finished product of rare-earth permanent magnet.
Embodiment three
The present invention provides a kind of technical solution: a kind of rare-earth permanent magnet, including (by mass percentage): No.1 magnetic powder
45%, No. two magnetic powders 42%, diadust 4%, environmentally friendly ambrose alloy nickel 3%, surplus is binder metal powder.
No.1 magnetic powder is by (by mass percentage): Sm2Co17 40% and SmCo5 60% is formed, wherein Sm2Co17
(SmCo) is second generation rare earth permanent-magnetic material, and SmCo5 (SmCo) is first generation rare earth permanent-magnetic material, and the two mixing has magnetic energy product
Moderate, cost is relatively low, and reliable coercitive performance, compared with neodymium iron boron, SmCo is more suitable for work in the high temperature environment, has
Higher heat resistance.
No. two magnetic powders are by (by mass percentage): Agglutinate neodymium-iron-boron 40% and neodymium iron boron 60% form, and bond neodymium
Iron boron all directions are all magnetic, corrosion-resistant, and Agglutinate neodymium-iron-boron and neodymium iron boron are mixed, so that rare-earth permanent magnet is corrosion-resistant
And magnetic aspect suffers from one and qualitatively improves.
The binder metal powder is ethylene acrylic acid co polymer, is a kind of poly- with thermoplasticity and high cementability
Close object, the bonding and molding that can be used between No.1 magnetic powder and No. two magnetic powders.
A kind of a kind of preparation method of rare-earth permanent magnet as described above, the preparation method comprise the steps of:
Step 1: production No.1 magnetic powder, (by mass percentage) takes Sm2Co17 40% and SmCo5 60%, in glass
Or be mixed in plastic vessel, it is stirred 6 minutes using stirring rod made of glass or plastics, is deposited after No.1 magnetic powder is made
Deposit is used；
Step 2: production No.1 magnetic powder, (by mass percentage) takes Agglutinate neodymium-iron-boron 40% and neodymium iron boron 60%, in glass
It is mixed, is stirred 6 minutes using stirring rod made of glass or plastics, after No. two magnetic powders are made in glass or plastic vessel
It stores spare；
Step 3: weighing raw material, weighs raw material according to above-mentioned mass percent, and store respectively spare；
Step 4: prepared No.1 magnetic powder, No. two magnetic powders, diadust and metal powder binder are pressed in mixing
Aforementioned proportion mixed rolling is rolled using two groups of rolls when rolling, is rolled 40 minutes；
Step 5: molded blank, No.1 magnetic powder, No. two magnetic powders, diadust and the metal powder rolled by roll
Adhesive obtains preform；
Step 6: preform is heated to 550 degrees Celsius by hot pressing, and hot pressing 30 is carried out under the pressure of 200MPa
Minute, obtain the crude product blank of rare-earth permanent magnet；
Step 7: surface passivation plates environmentally friendly ambrose alloy nickel layer in crude product blank surface, so that rare-earth permanent magnet is with higher
Corrosion resistance；
Step 8, finished product, at this point, obtaining the finished product of rare-earth permanent magnet.
Example IV
The present invention provides a kind of technical solution: a kind of rare-earth permanent magnet, including (by mass percentage): No.1 magnetic powder
35%, No. two magnetic powders 50%, diadust 8%, environmentally friendly ambrose alloy nickel 1%, surplus is binder metal powder.
No.1 magnetic powder is by (by mass percentage): Sm2Co17 30% and SmCo5 70% is formed, wherein Sm2Co17
(SmCo) is second generation rare earth permanent-magnetic material, and SmCo5 (SmCo) is first generation rare earth permanent-magnetic material, and the two mixing has magnetic energy product
Moderate, cost is relatively low, and reliable coercitive performance, compared with neodymium iron boron, SmCo is more suitable for work in the high temperature environment, has
Higher heat resistance.
No. two magnetic powders are by (by mass percentage): Agglutinate neodymium-iron-boron 55% and neodymium iron boron 45% form, and bond neodymium
Iron boron all directions are all magnetic, corrosion-resistant, and Agglutinate neodymium-iron-boron and neodymium iron boron are mixed, so that rare-earth permanent magnet is corrosion-resistant
And magnetic aspect suffers from one and qualitatively improves.
The binder metal powder is ethylene acrylic acid co polymer, is a kind of poly- with thermoplasticity and high cementability
Close object, the bonding and molding that can be used between No.1 magnetic powder and No. two magnetic powders.
A kind of a kind of preparation method of rare-earth permanent magnet as described above, the preparation method comprise the steps of:
Step 1: production No.1 magnetic powder, (by mass percentage) takes Sm2Co17 30% and SmCo5 70%, in glass
Or be mixed in plastic vessel, it is stirred 3 minutes using stirring rod made of glass or plastics, is deposited after No.1 magnetic powder is made
Deposit is used；
Step 2: production No.1 magnetic powder, (by mass percentage) takes Agglutinate neodymium-iron-boron 55% and neodymium iron boron 45%, in glass
It is mixed, is stirred 3 minutes using stirring rod made of glass or plastics, after No. two magnetic powders are made in glass or plastic vessel
It stores spare；
Step 3: weighing raw material, weighs raw material according to above-mentioned mass percent, and store respectively spare；
Step 4: prepared No.1 magnetic powder, No. two magnetic powders, diadust and metal powder binder are pressed in mixing
Aforementioned proportion mixed rolling is rolled using five groups of rolls when rolling, is rolled 10 minutes；
Step 5: molded blank, No.1 magnetic powder, No. two magnetic powders, diadust and the metal powder rolled by roll
Adhesive obtains preform；
Step 6: preform is heated to 500 degrees Celsius by hot pressing, and is carried out hot pressing 10 under the pressure of 80MPa and divided
Clock obtains the crude product blank of rare-earth permanent magnet；
Step 7: surface passivation plates environmentally friendly ambrose alloy nickel layer in crude product blank surface, so that rare-earth permanent magnet is with higher
Corrosion resistance；
Step 8, finished product, at this point, obtaining the finished product of rare-earth permanent magnet.
The present invention is improved the magnetic energy product of rare-earth permanent magnet, is had by the way of No.1 magnetic powder and No. two magnetic powder mixing
Higher heat resistance, reliable coercitive performance, cost is relatively low, and magnetic energy product is moderate, and No.1 magnetic powder and No. two magnetic powder doping
Hot pressing forms after rolling after diadust and binder metal powder mixing, and intensity and the surface for improving rare-earth permanent magnet are hard
Degree, rare-earth permanent magnet is hardly damaged, surface not cracky, and the surface of rare-earth permanent magnet is coated with environmentally friendly ambrose alloy nickel layer, both environmentally friendly,
The corrosion resistance of rare-earth permanent magnet is strengthened again, is suitble to promote.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (9)
1. a kind of rare-earth permanent magnet, it is characterised in that: including (by mass percentage): No.1 magnetic powder 20-50%, No. two magnetic powders
30-50%, diadust 5-10%, environmentally friendly ambrose alloy nickel 1-4%, surplus is binder metal powder.
2. a kind of rare-earth permanent magnet according to claim 1, it is characterised in that: the No.1 magnetic powder is by (pressing quality percentage
Than meter): Sm2Co17 30-70% and SmCo5 30-70% composition.
3. a kind of rare-earth permanent magnet according to claim 1, it is characterised in that: No. two magnetic powders are by (pressing quality percentage
Than meter): Agglutinate neodymium-iron-boron 40-60% and neodymium iron boron 40-60% composition.
4. a kind of rare-earth permanent magnet according to claim 1, it is characterised in that: the binder metal powder is ethylene propylene
Olefin(e) acid copolymer.
5. a kind of rare-earth permanent magnet according to claim 1, it is characterised in that: the rare-earth permanent magnet includes (pressing quality
Percentages): 50%, No. two magnetic powder 30% of No.1 magnetic powder, diadust 10%, environmentally friendly ambrose alloy nickel 4%, surplus is metal powder
Last binder.
6. a kind of rare-earth permanent magnet according to claim 1, it is characterised in that: the rare-earth permanent magnet includes (pressing quality
Percentages): 48%, No. two magnetic powder 36% of No.1 magnetic powder, diadust 8%, environmentally friendly ambrose alloy nickel 2%, surplus is metal powder
Last binder.
7. a kind of rare-earth permanent magnet according to claim 1, it is characterised in that: the rare-earth permanent magnet includes (pressing quality
Percentages): 40%, No. two magnetic powder 45% of No.1 magnetic powder, diadust 6%, environmentally friendly ambrose alloy nickel 3%, surplus is metal powder
Last binder.
8. a kind of rare-earth permanent magnet according to claim 1, it is characterised in that: the rare-earth permanent magnet includes (pressing quality
Percentages): 32%, No. two magnetic powder 50% of No.1 magnetic powder, diadust 10%, environmentally friendly ambrose alloy nickel 2%, surplus is metal powder
Last binder.
9. a kind of a kind of preparation method of rare-earth permanent magnet as described in claim 1-8 any one, it is characterised in that: the system
Preparation Method comprises the steps of:
Step 1: production No.1 magnetic powder, (by mass percentage) takes Sm2Co17 30-70% and SmCo530-70%, in glass
It is mixed in glass or plastic vessel, is stirred 3-10 minutes using stirring rod made of glass or plastics, No.1 magnetic is made
It is stored after powder spare；
Step 2: production No.1 magnetic powder, (by mass percentage) takes Agglutinate neodymium-iron-boron 40-60% and neodymium iron boron 40-60%,
It is mixed in glass or plastic vessel, is stirred 3-10 minutes using stirring rod made of glass or plastics, be made No. two
It is stored after magnetic powder spare；
Step 3: weighing raw material, weighs raw material according to above-mentioned mass percent, and store respectively spare；
Step 4: mixing, by prepared No.1 magnetic powder, No. two magnetic powders, diadust and metal powder binder by above-mentioned
Ratio mixed rolling, when rolling, one or more groups of rolls can be used to roll, and roll 10-60 minutes；
Step 5: molded blank, the No.1 magnetic powder rolled by roll, No. two magnetic powders, diadust and metal powder bond
Agent obtains preform；
Step 6: preform is heated to 500-900 degrees Celsius, and carries out hot pressing under the pressure of 80-300MPa by hot pressing
10-40 minutes, obtain the crude product blank of rare-earth permanent magnet；
Step 7: surface passivation plates environmentally friendly ambrose alloy nickel layer in crude product blank surface, so that rare-earth permanent magnet corrosion resistant with higher
Corrosion energy；
Step 8, finished product, at this point, obtaining the finished product of rare-earth permanent magnet.
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