CN107026004A - The sintering equipment and its sintering method of a kind of Sintered NdFeB magnet - Google Patents
The sintering equipment and its sintering method of a kind of Sintered NdFeB magnet Download PDFInfo
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- CN107026004A CN107026004A CN201710330240.1A CN201710330240A CN107026004A CN 107026004 A CN107026004 A CN 107026004A CN 201710330240 A CN201710330240 A CN 201710330240A CN 107026004 A CN107026004 A CN 107026004A
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- sintering
- sintering furnace
- inlet pipe
- air inlet
- product
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/003—Apparatus, e.g. furnaces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
-
- 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
- H01F1/0577—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 sintered
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Hard Magnetic Materials (AREA)
- Manufacturing Cores, Coils, And Magnets (AREA)
Abstract
The present invention relates to a kind of sintering equipment of Sintered NdFeB magnet, including the sintering furnace connected two-by-two, cooling system and blower system, covered with zone of heating on the inwall of sintering furnace, the support for placing product is additionally provided with inwall, air inlet pipe is installed on sintering furnace inwall, heat insulation layer is provided between the inner and outer wall of sintering furnace, the inlet end of air inlet pipe is by total pipeline through heat insulation layer outer wall and blower system in sintering furnace ft connection, air inlet pipe is set through zone of heating, the outlet side of air inlet pipe is exposed to the zone of heating, and nozzle of the outlet side provided with both sides outlet round about, cooling gas is set circumferentially to be blown out along inwall, the outlet side of air inlet pipe and the product being placed on support are arranged at intervals, the inlet end of air inlet pipe is also connected with outside cooling gas source；A kind of sintering method of the above-mentioned sintering equipment of application is also provided, the present invention changes the blowing direction of air inlet pipe, makes cooling gas and product formation gas transition region, effectively prevent product because the phenomenon that temperature spread is larger and ftractures；By the sintering method of the present invention, cooldown rate, the magnetic property of magnet and quality are improved.
Description
Technical field
The present invention relates to sintering equipment and its sintering side of a kind of sintering equipment, more particularly to a kind of Sintered NdFeB magnet
Method.
Background technology
In the production process of Sintered NdFeB magnet, be frequently encountered relatively large product (more than 1kg) sintering, for compared with
Often there is the phenomenon that product ftractures in being sintered in for chunk products in sintering process, its reason is primarily due in cooling procedure
Cold and hot gap is big between the cooling gas and product that are filled with, and convergent force is very big when being expanded with heat and contract with cold when product is cooled, but production
Product, which are originally experienced, has frictional resistance effect between gravity and magazine, frictional force and convergent force interaction are too big, cause magnet to be opened
Split.
In the prior art when to product blowing cooling gas, using blow-through mode, as shown in figure 1, being set on sintering furnace 1 '
The air inlet pipe 6 ' with blow-through nozzle is put, i.e. product and cooling gas directly does heat exchange, if in sintering temperature to product blow-through
Cooling gas, the huge temperature difference causes product to ftracture.
In order to avoid greater loss, the type of cooling allows product natural cooling using first cooling gas is not filled with, when being reduced to
After medium temperature, cooling gas air blast cooling is re-filled with, and time-consuming for natural cooling, greatly reduces the production effect of sintering equipment
Rate, and the cooling of neodymium iron boron magnetic body needs fast quenching, and natural cooling also reduces the magnetic of this topic while cooling velocity is reduced
Performance indications, influence the quality of product.
The content of the invention
The technical problems to be solved by the invention be reduce the deficiencies in the prior art there is provided one kind can guarantee that product quality and
Shorten the sintering equipment and its sintering method of a kind of Sintered NdFeB magnet of cool time
The present invention solve the technical scheme that is used of above-mentioned technical problem for：A kind of sintering dress of Sintered NdFeB magnet
Put, including sintering furnace, cooling system and the blower system connected two-by-two, it is interior covered with zone of heating on the inwall of the sintering furnace
Be additionally provided with wall on the support for placing product, the sintering furnace inwall and air inlet pipe be installed, the inwall of the sintering furnace and
Heat insulation layer is provided between outer wall, the inlet end of the air inlet pipe is being sintered by total pipeline through heat insulation layer outer wall with blower system
Stove ft connection, the air inlet pipe is set through zone of heating, it is characterised in that：The outlet side of the air inlet pipe is exposed to described add
Thermosphere, and nozzle of the outlet side provided with both sides outlet round about, make cooling gas circumferentially be blown out along inwall, described
The outlet side of air inlet pipe and the product that is placed on support are arranged at intervals, the inlet end of the air inlet pipe also with outside cooling gas
Source is connected.
Further, the zone of heating includes at least two around the circumferential molybdenum ribbon of sintering furnace inwall, described at least two
Equidistantly it is arranged at intervals between molybdenum ribbon, the outlet side of the air inlet pipe run through in every molybdenum ribbon is equally distributed.
Further, the two ends of the sintering furnace are equipped with for cooling gas to be discharged into sintering furnace and enters cooling system
Gas outlet.
Further, vacuum is less than 10 in the stove of the sintering furnace-2Pa, the inlet end pressure range of the air inlet pipe
For 100kPa~150kPa.
Further, the cooling system is the water cooling for carrying out heat exchange to the cooling gas after heating in sintering furnace
Mechanism.
Present invention also offers the method for the above-mentioned sintering equipment Sintered NdFeB magnet of application, including step are as follows：
A, the magazine that will be equipped with product are put into the sintering equipment of Sintered NdFeB magnet, and will vacuumized in sintering furnace
To setting range；
Zone of heating in b, control sintering furnace heats up and reaches sintering temperature；
C, from outside by air inlet pipe cooling gas is filled with into sintering furnace, while the gas heat exchange for passing through cooling system
Circulation air blast with blower system coordinates, by product cooling to 500 DEG C~600 DEG C；
One-level tempering is carried out in d, sintering furnace, 900 DEG C~930 DEG C are warming up to；
E, it is cooled to 500 DEG C~600 DEG C again according to step c.
Further, the product is being warming up to sintering temperature to heat up stage by stage, the first stage be warming up to 200 DEG C~
After 300 DEG C, 2h~3h is incubated, to product degreasing, second stage is warming up to 500 DEG C~600 DEG C, is incubated 1.5h~2h, to production
Pint gas, the phase III is warming up to 800 DEG C~900 DEG C, is incubated 2h~3h, and fourth stage is warming up to 1050 DEG C, and insulation 0.5h~
1h, the 5th stage is directly warming up to sintering temperature, is incubated 6h~7h.
Further, paving spills alumina powder between product and magazine before heat-agglomerating stove.
Compared with prior art, the advantage of the invention is that：The sintering equipment of the present invention changes the blowing direction of air inlet pipe,
The direct contact product of cooling gas is avoided, air inlet pipe of the invention is blown to the circumference of sintering furnace, and cooling gas is first to zone of heating
Cooling, while cooling gas heats up, cooling gas and product directly form gas transition region, reduce cooling gas and product it
Between temperature difference, effectively prevent product because temperature spread is larger and ftracture phenomenon；It is cold by the sintering method of the present invention
What indirect heat transmission and air blast but between gas and product was circulated is combined cooling, shortens the time-consuming of natural cooling, effectively
Cooldown rate is improved, while improving the magnetic property of magnet, the quality of product is improved.
Brief description of the drawings
Fig. 1 is the simple structure schematic diagram that cooling gas is acted on product in the prior art.
Fig. 2 is the structural representation of the sintering equipment of the Sintered NdFeB magnet of the embodiment of the present invention.
For the sectional view of sintering furnace in the sintering equipment of Sintered NdFeB magnet of the present invention, (wind direction containing air inlet pipe shows Fig. 3
Meaning).
Fig. 4 (shows for the outlet side schematic diagram of air inlet pipe in the sintering equipment of Sintered NdFeB magnet of the present invention containing wind direction
Meaning).
Embodiment
The present invention is described in further detail below in conjunction with accompanying drawing embodiment.
Embodiment 1：
As in Figure 2-4, the present embodiment provides a kind of sintering equipment of Sintered NdFeB magnet, including the burning connected two-by-two
Covered with zone of heating 4 on freezing of a furnace 1, cooling system 2 and blower system 3, the inwall of sintering furnace 1, zone of heating 4 includes at least two rings
Around the circumferential molybdenum ribbon of the inwall of sintering furnace 1, equidistantly it is arranged at intervals between every two molybdenum ribbon, the air inlet pipe 6 run through in every molybdenum ribbon
Outlet side be equally distributed, the support 5 for placing product is additionally provided with inwall, the inwall of sintering furnace 1 is provided with air inlet pipe
6, be heat insulation layer between the inner and outer wall of sintering furnace 1, air inlet pipe 6 set through zone of heating 4 and on zone of heating 4 equally
Distribution, the inlet end of air inlet pipe 6 runs through heat insulation layer with blower system 3 in the ft connection of sintering furnace 1, air inlet pipe 6 by total pipeline
Outlet side be exposed to zone of heating 4, and nozzle of the outlet side provided with both sides outlet round about makes cooling gas edge
Inwall is circumferentially blown out, and the outlet side of air inlet pipe 6 and the product that is placed on support 5 are arranged at intervals, the inlet end of air inlet pipe 6 also with
Outside cooling gas source connection.
When cooling gas is filled with sintering furnace 1 from outside, cooling gas blows cold air, cooling gas and product to zone of heating 4
Between form gas transition region, cooling gas has carried out heat transfer due to elder generation and zone of heating 4, causes the cooling of gas transition region
Gas heating, reduces cooling gas and the temperature difference of product, it is to avoid cooling gas blow-through occur causes product and cooling gas
The temperature difference is huge and produces the phenomenon of rupture.
The fire door of sintering furnace 1 and furnace bottom two ends are equipped with gas outlet 7, air draft of the cooling gas after heating in blower system
Cooling system 2 is entered by mouth 7 of going out under effect, is cooled by the magnetism servo-electric motor water-cooling of cooling system 2, reduces the cooling after being warmed
Gas, enters blower system 3 by the cooling gas after cooling system 2, then reenters sintering furnace 1 by blower system 3 and use
In cooling product.
The needing before sintering of sintering furnace 1 keeps vacuum, and vacuum is less than 10 in stove-2Pa, and for cooling gas
Pressure range into air inlet pipe is 100kPa~150kPa.
Embodiment 2：
A kind of method of sintering furnace Sintered NdFeB magnet in Application Example 1, including step are as follows：
The product that will be equipped with 5.07kg is put into magazine, then magazine is placed on support, spreads and spills between product and magazine
Alumina powder and 10 will be evacuated in sintering furnace-2Pa；
Control the zone of heating in sintering furnace to carry out first stage heating, be warming up to 250 DEG C and be incubated 2.5h, this stage is to production
Product carry out degreasing processing；
Second stage heating is controlled, 550 DEG C are warming up to, 2h is incubated, this stage is de-gassed to product and discharges waste gas；
Phase III heating is controlled, 850 DEG C are warming up to, 2.5h is incubated；
Fourth stage heating is controlled, 1050 DEG C of sintering temperature is warming up to, 6h is incubated；
Cooling gas is filled with into sintering furnace from outside by air inlet pipe, the pressure of cooling gas is 125kPa, is led to simultaneously
The gas heat exchange of supercooling system and the circulation air blast of blower system coordinate, by product cooling to 500 DEG C；
One-level tempering is carried out, 930 DEG C are warming up to；
Cooling gas is filled with again, and 500 DEG C are cooled to again.
As shown in table 1, it is the outward appearance of used time and product of the product that sinters out of embodiment 2 in cooling procedure.
Table 1：
Embodiment 3：
The product that will be equipped with 5.07kg is put into magazine, then magazine is placed on support, spreads and spills between product and magazine
Alumina powder and 10 will be evacuated in sintering furnace-2Pa；
Control the zone of heating in sintering furnace to carry out first stage heating, be warming up to 250 DEG C and be incubated 2.5h, this stage is to production
Product carry out degreasing processing；
Second stage heating is controlled, 550 DEG C are warming up to, 2h is incubated, this stage is de-gassed to product and discharges waste gas；
Phase III heating is controlled, 850 DEG C are warming up to, 2.5h is incubated；
Fourth stage heating is controlled, 1100 DEG C of sintering temperature is warming up to, 6h is incubated；
Cooling gas is filled with into sintering furnace from outside by air inlet pipe, the pressure of cooling gas is 125kPa, is led to simultaneously
The gas heat exchange of supercooling system and the circulation air blast of blower system coordinate, by product cooling to 550 DEG C；
One-level tempering is carried out, 930 DEG C are warming up to；
Cooling gas is filled with again, and 550 DEG C are cooled to again.
As shown in table 2, it is the outward appearance of used time and product of the product that sinters out of embodiment 3 in cooling procedure.
Table 2：
Embodiment 4
The product that will be equipped with 5.07kg is put into magazine, then magazine is placed on support, spreads and spills between product and magazine
Alumina powder and 10 will be evacuated in sintering furnace-2Pa；
Control the zone of heating in sintering furnace to carry out first stage heating, be warming up to 250 DEG C and be incubated 2.5h, this stage is to production
Product carry out degreasing processing；
Second stage heating is controlled, 550 DEG C are warming up to, 2h is incubated, this stage is de-gassed to product and discharges waste gas；
Phase III heating is controlled, 850 DEG C are warming up to, 2.5h is incubated；
Fourth stage heating is controlled, 1070 DEG C of sintering temperature is warming up to, 6h is incubated；
Cooling gas is filled with into sintering furnace from outside by air inlet pipe, the pressure of cooling gas is 125kPa, is led to simultaneously
The gas heat exchange of supercooling system and the circulation air blast of blower system coordinate, by product cooling to 550 DEG C；
One-level tempering is carried out, 900 DEG C are warming up to；
Cooling gas is filled with again, and 550 DEG C are cooled to again.
As shown in table 3, it is the outward appearance of used time and product of the product that sinters out of embodiment 4 in cooling procedure.
Table 3：
With the experimental data contrast of example IV using the data of natural cooling, required cool time is to the such as institute of table 4
Show
Table 4：
High temperature heat loss contrast is carried out to the product cooled down in natural cooling and embodiment 4, two kinds of products are processed respectively
Into direction of magnetization identical square piece, start timing after 120 DEG C of drying box inside holdings, product to insulation, toast 5h.It is cooled to
Room temperature, the magnetic property contrast of measurement magnetic flux heat loss product is as shown in table 5：
Table 5：
| Remanent magnetism Br (kGs) | Coercivity H j (kOe) | Squareness HK/Hcj | Magnetic flux lapse rate | |
| Natural cooling | 12.91-13.06 | 17.73-18.26 | 0.931-0.975 | 4.81%-7.46% |
| Embodiment 4 is cooled down | 12.94-13.07 | 18.03-18.65 | 0.980-0.992 | 3.57%-4.12% |
According to table 5, remanent magnetism (Br) change of magnet is little, and coercivity (Hcj) improves 0.3-0.39kOe, square
Degree (HK/Hcj) improves 0.49, and from data analysis, the cooling velocity using embodiment 4 has been accelerated, and magnet has obtained fast quenching,
Without impurities phase is separated out inside magnet, unnecessary crystallization is reduced, the uniformity of magnet is substantially improved.
Although the preferred embodiments of the present invention described in detail above, it is to be clearly understood that for this area
Technical staff for, the present invention can have various modifications and variations.That is made within the spirit and principles of the invention appoints
What modification, equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (8)
1. a kind of sintering equipment of Sintered NdFeB magnet, including sintering furnace (1), cooling system (2) and the air blast connected two-by-two
Covered with zone of heating (4) on system (3), the inwall of the sintering furnace (1), the support for placing product is additionally provided with inwall
(5), it is provided with sintering furnace (1) inwall between air inlet pipe (6), the inner and outer wall of the sintering furnace and is provided with heat insulation layer,
The inlet end of the air inlet pipe (6) is connected through heat insulation layer outer wall by total pipeline with blower system (3) outside sintering furnace (1)
Logical, the air inlet pipe (6) is set through zone of heating, it is characterised in that：The outlet side of the air inlet pipe (6) is exposed to the heating
Layer, and nozzle of the outlet side provided with both sides outlet round about, make cooling gas circumferentially be blown out along inwall, it is described enter
The outlet side of tracheae (6) and the product that is placed on support (5) are arranged at intervals, the inlet end of the air inlet pipe (6) also with outside
Cooling gas source is connected.
2. a kind of sintering equipment of Sintered NdFeB magnet as claimed in claim 1, it is characterised in that：The zone of heating (4)
Equidistantly it is arranged at intervals between the circumferential molybdenum ribbon of sintering furnace (1) inwall, at least two molybdenum ribbon including at least two, often
The outlet side of the air inlet pipe (6) run through in bar molybdenum ribbon is equally distributed.
3. a kind of sintering equipment of Sintered NdFeB magnet as claimed in claim 1, it is characterised in that：The sintering furnace (1)
Two ends be equipped with for by cooling gas discharge sintering furnace and enter cooling system gas outlet (7).
4. a kind of sintering equipment of Sintered NdFeB magnet as claimed in claim 1, it is characterised in that：The sintering furnace (1)
Stove in vacuum be less than 10-2Pa, the inlet end pressure range of the air inlet pipe is 100kPa~150kPa.
5. a kind of sintering equipment of Sintered NdFeB magnet as claimed in claim 1, it is characterised in that：The cooling system
(2) it is for the magnetism servo-electric motor water-cooling to the cooling gas progress heat exchange after heating in sintering furnace (1).
6. a kind of method for applying the sintering equipment Sintered NdFeB magnet as described in claim 1-5 any one, including step
It is rapid as follows：
A, the magazine that will be equipped with product are put into the sintering equipment of Sintered NdFeB magnet, and will be evacuated to vacuum in sintering furnace；
Zone of heating in b, control sintering furnace heats up and reaches sintering temperature；
C, from outside by air inlet pipe cooling gas is filled with into sintering furnace, while gas heat exchange and drum by cooling system
The circulation air blast of wind system coordinates, by product cooling to 500 DEG C~600 DEG C；
One-level tempering is carried out in d, sintering furnace, 900 DEG C~930 DEG C are warming up to；
E, it is cooled to 500 DEG C~600 DEG C again according to step c.
7. a kind of method of Sintered NdFeB magnet as claimed in claim 5, it is characterised in that：The product is being warming up to burning
Junction temperature is heats up stage by stage, and the first stage is warming up to after 200 DEG C~300 DEG C, 2h~3h is incubated, to product degreasing, second
Stage is warming up to 500 DEG C~600 DEG C, is incubated 1.5h~2h, to product degassing, and the phase III is warming up to 800 DEG C~900 DEG C, guarantor
Warm 2h~3h, fourth stage is warming up to 1050 DEG C, is incubated 0.5h~1h, and the 5th stage was directly warming up to sintering temperature, was incubated 6h
~7h.
8. a kind of method of Sintered NdFeB magnet as claimed in claim 5, it is characterised in that：Before heat-agglomerating stove
Paving spills alumina powder between product and magazine.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710330240.1A CN107026004A (en) | 2017-05-11 | 2017-05-11 | The sintering equipment and its sintering method of a kind of Sintered NdFeB magnet |
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| CN201710330240.1A CN107026004A (en) | 2017-05-11 | 2017-05-11 | The sintering equipment and its sintering method of a kind of Sintered NdFeB magnet |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112038084A (en) * | 2020-09-08 | 2020-12-04 | 安徽万磁电子有限公司 | Sintering process for magnet production |
| CN112062454A (en) * | 2020-08-27 | 2020-12-11 | 李悌坚 | Energy-saving vacuum fritting furnace for manufacturing vacuum glass |
| WO2021062649A1 (en) * | 2019-09-30 | 2021-04-08 | 江西荧光磁业有限公司 | Highly efficient neodymium-iron-boron magnet sintering device |
| CN115863012A (en) * | 2022-12-26 | 2023-03-28 | 长兴柏成电子有限公司 | Magnetic core and sintering process thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2489287Y (en) * | 2001-03-21 | 2002-05-01 | 赵宇靖 | Rare earth permanent-magnetic vacuum retort furnace |
| CN2581923Y (en) * | 2002-12-06 | 2003-10-22 | 湖南丰业科技有限责任公司 | Indirect cooling structure for air kiln outlet mouth |
| JP2006266615A (en) * | 2005-03-24 | 2006-10-05 | Daido Steel Co Ltd | Heat treatment furnace |
| CN101319271A (en) * | 2008-07-18 | 2008-12-10 | 沈阳恒进真空科技有限公司 | Nozzle cooling vacuum gas quenching furnace capable of convection heating |
| CN101611158A (en) * | 2007-04-20 | 2009-12-23 | 株式会社日立产机系统 | Iron core annealing furnace |
| CN103626389A (en) * | 2012-08-29 | 2014-03-12 | 英属开曼群岛商精曜有限公司 | Cooling device and operation method thereof |
| CN206774389U (en) * | 2017-05-11 | 2017-12-19 | 宁波尼兰德磁业股份有限公司 | A kind of sintering equipment of Sintered NdFeB magnet |
-
2017
- 2017-05-11 CN CN201710330240.1A patent/CN107026004A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2489287Y (en) * | 2001-03-21 | 2002-05-01 | 赵宇靖 | Rare earth permanent-magnetic vacuum retort furnace |
| CN2581923Y (en) * | 2002-12-06 | 2003-10-22 | 湖南丰业科技有限责任公司 | Indirect cooling structure for air kiln outlet mouth |
| JP2006266615A (en) * | 2005-03-24 | 2006-10-05 | Daido Steel Co Ltd | Heat treatment furnace |
| CN101611158A (en) * | 2007-04-20 | 2009-12-23 | 株式会社日立产机系统 | Iron core annealing furnace |
| CN101319271A (en) * | 2008-07-18 | 2008-12-10 | 沈阳恒进真空科技有限公司 | Nozzle cooling vacuum gas quenching furnace capable of convection heating |
| CN103626389A (en) * | 2012-08-29 | 2014-03-12 | 英属开曼群岛商精曜有限公司 | Cooling device and operation method thereof |
| CN206774389U (en) * | 2017-05-11 | 2017-12-19 | 宁波尼兰德磁业股份有限公司 | A kind of sintering equipment of Sintered NdFeB magnet |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021062649A1 (en) * | 2019-09-30 | 2021-04-08 | 江西荧光磁业有限公司 | Highly efficient neodymium-iron-boron magnet sintering device |
| CN112062454A (en) * | 2020-08-27 | 2020-12-11 | 李悌坚 | Energy-saving vacuum fritting furnace for manufacturing vacuum glass |
| CN112062454B (en) * | 2020-08-27 | 2021-07-09 | 江西鸿锦光电有限公司 | Energy-saving vacuum fritting furnace for manufacturing vacuum glass |
| CN112038084A (en) * | 2020-09-08 | 2020-12-04 | 安徽万磁电子有限公司 | Sintering process for magnet production |
| CN115863012A (en) * | 2022-12-26 | 2023-03-28 | 长兴柏成电子有限公司 | Magnetic core and sintering process thereof |
| CN115863012B (en) * | 2022-12-26 | 2023-09-05 | 长兴柏成电子有限公司 | Magnetic core and sintering process thereof |
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