CN105177598A - Technique for grain boundary diffusion of heavy rare earth of neodymium-iron-boron magnet - Google Patents
Technique for grain boundary diffusion of heavy rare earth of neodymium-iron-boron magnet Download PDFInfo
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- CN105177598A CN105177598A CN201510664200.1A CN201510664200A CN105177598A CN 105177598 A CN105177598 A CN 105177598A CN 201510664200 A CN201510664200 A CN 201510664200A CN 105177598 A CN105177598 A CN 105177598A
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Abstract
The invention relates to a technique for grain boundary diffusion of heavy rare earth of a neodymium-iron-boron magnet. The technique is characterized by comprising the following steps that 1, a heavy rare earth substrate is manufactured; 2, earlier-stage treatment of the neodymium-iron-boron magnet is conducted; 3, grain boundary diffusion of the heavy rare earth of the neodymium-iron-boron magnet is conducted; and 4, detection is conducted. The technique for grain boundary diffusion of the heavy rare earth of the neodymium-iron-boron magnet has the beneficial effects that 1, compared with a traditional method, the use amount of the heavy rare earth, namely dysprosium, is obviously reduced by about 2.5%, the utilization rate of rare earth resources is increased, and cost is reduced; 2, through dysprosium seepage treatment, the amount of dysprosium is increased by 0.2%-0.3%, the intrinsic coercive field Hcj of a product is increased by 6000 Oe, and the magnetic energy product is kept unchanged; 3, by the adoption of the technique, a double-high magnet, namely a rare earth permanent magnet high in magnetic energy product and high in Hcj, can be obtained; and 4, a compact metal film is formed in the surface of the magnet subjected to dysprosium seepage treatment, and compared with a product obtained through a traditional technique, the oxidation resistance and the corrosion resistance are also obviously improved; the requirement that a neodymium-iron-boron product must be electroplated is broken.
Description
Technical field
The present invention relates to a kind of neodymium iron boron magnetic body grain boundary decision heavy rare earths technique.
Background technology
Sintered Nd-Fe-B permanent magnetic material has excellent magnetic property because of it, become widely used functional materials, be mainly used in the fields such as communication electronics, servomotor, medicine equipment, space flight and aviation, comparatively common are new-energy automobile drive-motor, the compressor electric motor of convertible frequency air-conditioner, the servomotor, wind power generating motor, elevator motor, wind-power electricity generation, computer disc driver, MR imaging apparatus instrument etc. of industrial automation equipment.Whole world annual requirement is about 4-5 about ten thousand tons.
These fields require that neodymium iron boron magnetic body must possess following performance: a. magnetic energy product (BH) max is high as far as possible, and electric energy conversion is the efficiency of kinetic energy by >=50MGOe(motor); B. HCJ Hcj is high as far as possible, >=20000Oe (maintaining the ability compared with high energy product under high temperature).
The material mark meeting the magnetic property requirements of above two aspects is N50SH, as according to traditional producing and manufacturing technique, formulating of recipe aspect then needs to increase a large amount of heavy rare earth element dysprosiums or terbium (about 3.5%wt), these two kinds of metallic elements all belong to scarce resource, expensive (dysprosium Dy-2000 unit/kg), directly increase the manufacturing cost of product like this, limit the application of product; On the other hand, select traditional processing method, still difficulty realizes over-all properties and is greater than 68(BH value+Hcj value at present) production of trade mark material.
Summary of the invention
For problems of the prior art, the object of the present invention is to provide the technical scheme of neodymium iron boron magnetic body grain boundary decision heavy rare earths technique.
Described neodymium iron boron magnetic body grain boundary decision heavy rare earths technique, is characterized in that comprising the steps:
1. heavy rare earth metal substrate manufacture
1.1 make crucible
1) by weight by refractory materials: boric acid: water glass fully stirs with 200:20:1, mix for subsequent use;
2) bottom induction coil asbestos plate being put into vacuum induction melting furnace, glass wool cloth is wrapped up on asbestos plate surface and induction coil internal surface, add the refractory materials in step 1), boric acid, waterglass mixture, with hammer and iron staff tamping, reinforced height is concordant with induction coil undermost copper pipe upper limb;
3) crucible courage is inserted induction coil central position, bottom crucible courage and step 2) in refractory materials, boric acid, waterglass mixture close contact; Crucible courage surrounding continues filling fire resisting material, boric acid, waterglass mixture, and surrounding distance induction coil inwall is even;
1.2 crucible bakings
The crucible 5-6kw made slowly is heated and carries out baking 6 ± 0.5h, then improve heating power to 10 ± 1kw and toast, toast 12-14h continuously, until baking parches;
1.3 materials prepare, shove charge
Metal dysprosium is loaded in crucible, then load vacuum induction melting furnace; After furnace charge installs, assemble ingot mould and water cup, clicking ingot mould and automatically enter button, close bell;
Dysprosium substrate manufacture is carried out in 1.4 vacuum meltings
A) open water coolant, start the mechanical pump of vacuum induction melting furnace and open and slightly take out valve body of heater is vacuumized, when vacuum tightness reaches-0.01MPa and lobe pump shaft coupling does not rotate, opening the lobe pump pumping high vacuum of vacuum induction melting furnace;
B) when vacuum tightness reaches below 5Pa, open intermediate frequency power supply, with the venting of 15 ± 5kW power heating, in deflation course, vacuum tightness can not lower than 10Pa; After vacuum tightness reaches requirement, close and slightly take out valve, vacuumometer, lobe pump and mechanical pump, and reach-0.06 ± 0.03MPa to applying argon gas in vacuum induction melting furnace to vacuum pressure meter reading;
C) monitor system is strengthened gradually, until metal dysprosium fusing; Now monitor system is 65 ± 5kW, temperature 1500 ± 50 DEG C, remains on 5-6min under this power; Reduction power to 30 ± 5kW after melting completes, after keeping 2 ± 0.5min, carries out dysprosium substrate manufacture under this power;
D) select 200mm × 30mm, order number is the bracing frame of 20-180 object molybdenum net as dysprosium substrate; Molybdenum net is vertically sent in crucible melting furnace charge, proposed to hang up after furnace charge does not have molybdenum net;
After 1.5 substrate manufactures complete, be cooled to room temperature in stove after, blow-on is taken out;
2. neodymium iron boron magnetic body process in early stage: clean up with Ultrasonic Cleaners, guarantee that neodymium-iron-boron surface is without greasy dirt, without other external dirt settling, then oven for drying;
3. neodymium iron boron magnetic body grain boundary decision heavy rare earths
3.1 magnet pendulum boxes
dysprosium substrate is stacked gradually with the neodymium iron boron magnetic body that need process and puts;
the dysprosium substrate stacked and neodymium iron boron magnetic body are placed in square molybdenum box, square molybdenum box is of a size of 220mm × 120mm × 100mm, till occupying;
3.2 enter vacuum heat treatment furnace: by go-cart height control to entering stove height, open fire door, square molybdenum box is pushed in vacuum oven heating chamber, make outermost one arrange the outer peripheral position of square molybdenum box and be about 30-40mm apart from supporting traverse outer end, then slowly reduce go-cart bin height, make square molybdenum box stable landing on supporting traverse, ensure that square molybdenum box is in the flat-temperature zone of heating chamber, and slowly go-cart is taken out, close fire door;
3.3 heavy rare earths dysprosium infiltrations
) open the mechanical pump of vacuum heat treatment furnace, open and slightly take out valve, after waiting for 3min, open compound vacuum gauge, after the display of compound vacuum gauge resistance value is less than 100Pa and the mechanical pump opening time is greater than 5min, open the lobe pump of vacuum heat treatment furnace;
) after lobe pump pilot lamp lights about 5-10s, when vacuum tightness is less than 9.0 × 10
1during Pa, open front step valve;
) be less than 5 × 10 when vacuum tightness
0pa, opens heating diffusion pumps power supply, confirms that diffusion pump preheating is more than 60min, diffusion pump oil temperature reach 245 DEG C and vacuum tightness higher than 5 × 10
-1pa, closes and slightly takes out valve, open main valve;
) reach 10 when vacuum tightness
-3can heat during Pa, during heating, heating primary source is connected, until temperature is raised to set(ting)value 1000 DEG C, keeps this state 5-10h;
3.4 coolings are come out of the stove
) when heating will at the end of, check operating records and technique list, check actual operating state and whether reach cooling requirement, on operating records, write cooling in advance, check that whether argon gas consumption is enough, treat that alarm is sounded, close heater switch, close main valve or slightly take out valve, closing lobe pump, closing diffusion pump vacuum meter, open inflation valve, when argon gas or nitrogen reach capping, automatically stop inflation, open cooling blower, enter the pressure state of cooling;
) in temperature decline process, in stove, pressure can reduce, the inflation magnetic valve table bound that is stressed controls, and is constantly opened and closes, carrying out tonifying Qi;
) when temperature drops to design temperature 80 DEG C, strong cold process stops; Inflate in stove, come out of the stove and close fire door in time;
4 detect
After magnet is come out of the stove, magnetism testing instrument AMT-4 is selected to carry out magnetism testing.
Beneficial effect of the present invention:
1., compared with traditional method, heavy rare earth metal dysprosium (Dy) consumption significantly reduces (about 2.5%), improves the utilization ratio of rare earth resources, reduces cost;
2., by oozing dysprosium (Dy) process, increase the dysprosium (Dy) of 0.2-0.3%, product HCJ Hcj increasing degree is greater than 6000Oe, and magnetic energy product remains unchanged;
3. can obtain by this method the two high magnet that traditional technology can not produce, namely the rare-earth permanent magnet of high energy product, high Hcj, has filled up the market vacancy, meets the demand in market;
4. the magnet surface of oozing after dysprosium process defines the metallic film of one deck densification, have also been obtained significantly improve relative to traditional technology product oxidation-resistance, erosion resistance; Break the requirement that neodymium iron boron product must be electroplated.The use of this processing method also decreases environmental pollution indirectly.
Embodiment
Principle of the present invention: under high temperature, high vacuum state; heavy rare earth metal dysprosium (Dy) substrate and the neodymium iron boron magnetic body that need process successively are evenly distributed in the square molybdenum box in vacuum heat treatment furnace successively; under this condition, metal dysprosium (Dy) is close to its evaporation conditions; very active motion; neodymium iron boron magnetic body inside is penetrated into, along crystal boundary to Nd through neodymium iron boron magnetic body surface diffusion with the dysprosium atom of neodymium iron boron magnetic body surface contact
2fe
14the internal divergence of B, also referred to as grain boundary decision.Dysprosium (Dy) the content increase about 0.2-0.3% in neodymium iron boron magnetic body is made by aforesaid method, neodymium iron boron magnetic body HCJ Hcj significantly improves (about more than 6000Oe), and remanent magnetism and magnetic energy product are substantially constant, achieve the manufacture of the irrealizable high energy product of traditional technology, high HCJ product.Make use of the contribution of heavy rare earth metal to magnetism of material energy simultaneously to greatest extent, significantly reduce the manufacturing cost of high-performance Ne-Fe-B magneticsubstance.
This neodymium iron boron magnetic body grain boundary decision heavy rare earths technique, comprises the steps:
1. heavy rare earth metal substrate manufacture
Device name: vacuum induction melting furnace, model: ZGS-0.05E,
Producer: Sante Vacuum Metallurgical Tech Ind Co., Ltd., Jinzhou City,
Equipment body part comprises vacuum system (mechanical pump, lobe pump)+body of heater+Controlling System;
1.1 make crucible
1) by weight by refractory materials: boric acid: water glass fully stirs with 200:20:1, mix for subsequent use;
2) bottom induction coil asbestos plate being put into vacuum induction melting furnace, glass wool cloth is wrapped up on asbestos plate surface and induction coil internal surface, add the refractory materials in step 1), boric acid, waterglass mixture, with hammer and iron staff tamping, reinforced height is concordant with induction coil undermost copper pipe upper limb;
3) crucible courage is inserted induction coil central position, bottom crucible courage and step 2) in refractory materials, boric acid, waterglass mixture close contact; Crucible courage surrounding continues filling fire resisting material, boric acid, waterglass mixture, and surrounding distance induction coil inwall is even;
1.2 crucible bakings
The crucible 5-6kw made slowly is heated and carries out baking 6 ± 0.5h, then improve heating power to 10 ± 1kw and toast, toast 12-14h continuously, until baking parches;
1.3 materials prepare, shove charge
Metal dysprosium is loaded in crucible, then load vacuum induction melting furnace; After furnace charge installs, assemble ingot mould and water cup, clicking ingot mould and automatically enter button, close bell;
Dysprosium substrate manufacture is carried out in 1.4 vacuum meltings
A) open water coolant, start the mechanical pump of vacuum induction melting furnace and open and slightly take out valve body of heater is vacuumized, when vacuum tightness reaches-0.01MPa and lobe pump shaft coupling does not rotate, opening the lobe pump pumping high vacuum of vacuum induction melting furnace;
B) when vacuum tightness reaches below 5Pa, open intermediate frequency power supply, with the venting of 15 ± 5kW power heating, in deflation course, vacuum tightness can not lower than 10Pa; After vacuum tightness reaches requirement, close and slightly take out valve, vacuumometer, lobe pump and mechanical pump, and reach-0.06 ± 0.03MPa to applying argon gas in vacuum induction melting furnace to vacuum pressure meter reading;
C) monitor system is strengthened gradually, until metal dysprosium fusing; Now monitor system is 65 ± 5kW, temperature 1500 ± 50 DEG C, remains on 5-6min under this power; Reduction power to 30 ± 5kW after melting completes, after keeping 2 ± 0.5min, carries out dysprosium substrate manufacture under this power;
D) select 200mm × 30mm, order number is the bracing frame of 20-180 object molybdenum net as dysprosium substrate; Molybdenum net is vertically sent in crucible melting furnace charge, proposed to hang up after furnace charge does not have molybdenum net;
After 1.5 substrate manufactures complete, be cooled to room temperature in stove after, blow-on is taken out;
2. neodymium iron boron magnetic body process in early stage: clean up with Ultrasonic Cleaners, guarantee that neodymium-iron-boron surface is without greasy dirt, without other external dirt settling, then oven for drying;
3. neodymium iron boron magnetic body grain boundary decision heavy rare earths
Device name: vacuum heat treatment furnace, model: HV-6512MMI,
Producer: Ai Fake Zhong Bei vacuum company limited,
Equipment body part comprises vacuum system (mechanical pump, lobe pump)+body of heater+Controlling System;
3.1 magnet pendulum boxes
dysprosium substrate is stacked gradually with the neodymium iron boron magnetic body that need process and puts;
the dysprosium substrate stacked and neodymium iron boron magnetic body are placed in square molybdenum box, square molybdenum box is of a size of 220mm × 120mm × 100mm, (determines to put the number of plies according to neodymium iron boron magnetic body size) till occupying;
3.2 enter vacuum heat treatment furnace: by go-cart height control to entering stove height, open fire door, square molybdenum box is pushed in vacuum oven heating chamber, make outermost one arrange the outer peripheral position of square molybdenum box and be about 30-40mm apart from supporting traverse outer end, then slowly reduce go-cart bin height, make square molybdenum box stable landing on supporting traverse, ensure that square molybdenum box is in the flat-temperature zone of heating chamber, and slowly go-cart is taken out, close fire door;
3.3 heavy rare earths dysprosium infiltrations
) open the mechanical pump of vacuum heat treatment furnace, open and slightly take out valve, after waiting for 3min, open compound vacuum gauge, after the display of compound vacuum gauge resistance value is less than 100Pa and the mechanical pump opening time is greater than 5min, open the lobe pump of vacuum heat treatment furnace;
) after lobe pump pilot lamp lights about 5-10s, when vacuum tightness is less than 9.0 × 10
1during Pa, open front step valve;
) be less than 5 × 10 when vacuum tightness
0pa, opens heating diffusion pumps power supply, confirms that diffusion pump preheating is more than 60min, diffusion pump oil temperature reach 245 DEG C and vacuum tightness higher than 5 × 10
-1pa, closes and slightly takes out valve, open main valve;
) reach 10 when vacuum tightness
-3can heat during Pa, during heating, heating primary source is connected, until temperature is raised to set(ting)value 1000 DEG C, keeps this state 5-10h;
3.4 coolings are come out of the stove
) when heating will at the end of, check operating records and technique list, check actual operating state and whether reach cooling requirement, on operating records, write cooling in advance, check that whether argon gas consumption is enough, treat that alarm is sounded, close heater switch, close main valve or slightly take out valve, closing lobe pump, closing diffusion pump vacuum meter, open inflation valve, when argon gas or nitrogen reach capping, (automatically stop inflation), open cooling blower, enter the pressure state of cooling;
) in temperature decline process, in stove, pressure can reduce, inflation magnetic valve table bound (0 ~ 0.03MPa) that is stressed controls, and is constantly opened and closes, carrying out tonifying Qi;
) when temperature drops to design temperature 80 DEG C, strong cold process stops (namely closing blower fan and inflation valve); Inflate in stove, come out of the stove and close fire door in time;
4 detect
After magnet is come out of the stove, magnetism testing instrument AMT-4 is selected to carry out magnetism testing; Compare the change of magnetic parameter (remanent magnetism Br, coercivity H j, magnetic energy product BH) before and after magnet process.
Beneficial effect of the present invention:
1., compared with traditional method, heavy rare earth metal dysprosium (Dy) consumption significantly reduces (about 2.5%), improves the utilization ratio of rare earth resources, reduces cost;
2., by oozing dysprosium (Dy) process, increase the dysprosium (Dy) of 0.2-0.3%, product HCJ Hcj increasing degree is greater than 6000Oe, and magnetic energy product remains unchanged;
3. can obtain by this method the two high magnet that traditional technology can not produce, namely the rare-earth permanent magnet of high energy product, high Hcj, has filled up the market vacancy, meets the demand in market;
4. the magnet surface of oozing after dysprosium process defines the metallic film of one deck densification, have also been obtained significantly improve relative to traditional technology product oxidation-resistance, erosion resistance; Break the requirement that neodymium iron boron product must be electroplated.The use of this processing method also decreases environmental pollution indirectly.
Claims (1)
1. neodymium iron boron magnetic body grain boundary decision heavy rare earths technique, is characterized in that comprising the steps:
1. heavy rare earth metal substrate manufacture
1.1 make crucible
1) by weight by refractory materials: boric acid: water glass fully stirs with 200:20:1, mix for subsequent use;
2) bottom induction coil asbestos plate being put into vacuum induction melting furnace, glass wool cloth is wrapped up on asbestos plate surface and induction coil internal surface, add the refractory materials in step 1), boric acid, waterglass mixture, with hammer and iron staff tamping, reinforced height is concordant with induction coil undermost copper pipe upper limb;
3) crucible courage is inserted induction coil central position, bottom crucible courage and step 2) in refractory materials, boric acid, waterglass mixture close contact; Crucible courage surrounding continues filling fire resisting material, boric acid, waterglass mixture, and surrounding distance induction coil inwall is even;
1.2 crucible bakings
The crucible 5-6kw made slowly is heated and carries out baking 6 ± 0.5h, then improve heating power to 10 ± 1kw and toast, toast 12-14h continuously, until baking parches;
1.3 materials prepare, shove charge
Metal dysprosium is loaded in crucible, then load vacuum induction melting furnace; After furnace charge installs, assemble ingot mould and water cup, clicking ingot mould and automatically enter button, close bell;
Dysprosium substrate manufacture is carried out in 1.4 vacuum meltings
A) open water coolant, start the mechanical pump of vacuum induction melting furnace and open and slightly take out valve body of heater is vacuumized, when vacuum tightness reaches-0.01MPa and lobe pump shaft coupling does not rotate, opening the lobe pump pumping high vacuum of vacuum induction melting furnace;
B) when vacuum tightness reaches below 5Pa, open intermediate frequency power supply, with the venting of 15 ± 5kW power heating, in deflation course, vacuum tightness can not lower than 10Pa; After vacuum tightness reaches requirement, close and slightly take out valve, vacuumometer, lobe pump and mechanical pump, and reach-0.06 ± 0.03MPa to applying argon gas in vacuum induction melting furnace to vacuum pressure meter reading;
C) monitor system is strengthened gradually, until metal dysprosium fusing; Now monitor system is 65 ± 5kW, temperature 1500 ± 50 DEG C, remains on 5-6min under this power; Reduction power to 30 ± 5kW after melting completes, after keeping 2 ± 0.5min, carries out dysprosium substrate manufacture under this power;
D) select 200mm × 30mm, order number is the bracing frame of 20-180 object molybdenum net as dysprosium substrate; Molybdenum net is vertically sent in crucible melting furnace charge, proposed to hang up after furnace charge does not have molybdenum net;
After 1.5 substrate manufactures complete, be cooled to room temperature in stove after, blow-on is taken out;
2. neodymium iron boron magnetic body process in early stage: clean up with Ultrasonic Cleaners, guarantee that neodymium-iron-boron surface is without greasy dirt, without other external dirt settling, then oven for drying;
Neodymium iron boron magnetic body grain boundary decision heavy rare earths
3.1 magnet pendulum boxes
dysprosium substrate is stacked gradually with the neodymium iron boron magnetic body that need process and puts;
the dysprosium substrate stacked and neodymium iron boron magnetic body are placed in square molybdenum box, square molybdenum box is of a size of 220mm × 120mm × 100mm, till occupying;
3.2 enter vacuum heat treatment furnace: by go-cart height control to entering stove height, open fire door, square molybdenum box is pushed in vacuum oven heating chamber, make outermost one arrange the outer peripheral position of square molybdenum box and be about 30-40mm apart from supporting traverse outer end, then slowly reduce go-cart bin height, make square molybdenum box stable landing on supporting traverse, ensure that square molybdenum box is in the flat-temperature zone of heating chamber, and slowly go-cart is taken out, close fire door;
3.3 heavy rare earths dysprosium infiltrations
) open the mechanical pump of vacuum heat treatment furnace, open and slightly take out valve, after waiting for 3min, open compound vacuum gauge, after the display of compound vacuum gauge resistance value is less than 100Pa and the mechanical pump opening time is greater than 5min, open the lobe pump of vacuum heat treatment furnace;
) after lobe pump pilot lamp lights about 5-10s, when vacuum tightness is less than 9.0 × 10
1during Pa, open front step valve;
) be less than 5 × 10 when vacuum tightness
0pa, opens heating diffusion pumps power supply, confirms that diffusion pump preheating is more than 60min, diffusion pump oil temperature reach 245 DEG C and vacuum tightness higher than 5 × 10
-1pa, closes and slightly takes out valve, open main valve;
) reach 10 when vacuum tightness
-3can heat during Pa, during heating, heating primary source is connected, until temperature is raised to set(ting)value 1000 DEG C, keeps this state 5-10h;
3.4 coolings are come out of the stove
) when heating will at the end of, check operating records and technique list, check actual operating state and whether reach cooling requirement, on operating records, write cooling in advance, check that whether argon gas consumption is enough, treat that alarm is sounded, close heater switch, close main valve or slightly take out valve, closing lobe pump, closing diffusion pump vacuum meter, open inflation valve, when argon gas or nitrogen reach capping, automatically stop inflation, open cooling blower, enter the pressure state of cooling;
) in temperature decline process, in stove, pressure can reduce, the inflation magnetic valve table bound that is stressed controls, and is constantly opened and closes, carrying out tonifying Qi;
) when temperature drops to design temperature 80 DEG C, strong cold process stops; Inflate in stove, come out of the stove and close fire door in time;
4 detect
After magnet is come out of the stove, magnetism testing instrument AMT-4 is selected to carry out magnetism testing.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109735687A (en) * | 2018-10-18 | 2019-05-10 | 福建省长汀金龙稀土有限公司 | One kind being carried out continuously grain boundary decision and heat-treating apparatus and method |
| CN110106334A (en) * | 2018-02-01 | 2019-08-09 | 福建省长汀金龙稀土有限公司 | One kind being carried out continuously grain boundary decision and heat-treating apparatus and method |
| CN111383833A (en) * | 2019-11-11 | 2020-07-07 | 浙江东阳东磁稀土有限公司 | Grain boundary diffusion method for rare earth neodymium iron boron magnet |
| CN112201466A (en) * | 2020-11-06 | 2021-01-08 | 亚星智联(厦门)科技有限公司 | Neodymium-iron-boron magnet modification device for grain boundary diffusion metal infiltration |
| CN112680695A (en) * | 2020-12-17 | 2021-04-20 | 中国科学院力学研究所 | Method for simultaneously improving coercivity and corrosion resistance of sintered neodymium iron boron |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101506919A (en) * | 2006-08-23 | 2009-08-12 | 株式会社爱发科 | Permanent magnet and process for producing the same |
| CN102177271A (en) * | 2008-10-08 | 2011-09-07 | 株式会社爱发科 | Evaporation material and method for producing evaporation material |
| CN102925688A (en) * | 2012-10-23 | 2013-02-13 | 鞍钢股份有限公司 | Method for refining high-purity ferrosilicon |
| CN103994663A (en) * | 2014-06-11 | 2014-08-20 | 沈阳飞机工业（集团）有限公司 | Method for prolonging service life of furnace lining of medium-frequency induction furnace |
| CN104557074A (en) * | 2014-12-01 | 2015-04-29 | 本钢板材股份有限公司 | Furnace-ramming ingredient of atmospheric-pressure medium-frequency furnace and preparation method of crucible |
| CN104681225A (en) * | 2013-12-03 | 2015-06-03 | 湖南稀土金属材料研究院 | Treating method for improving performance of sintered NdFeB (neodymium iron boron) materials |
-
2015
- 2015-10-15 CN CN201510664200.1A patent/CN105177598A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101506919A (en) * | 2006-08-23 | 2009-08-12 | 株式会社爱发科 | Permanent magnet and process for producing the same |
| CN102177271A (en) * | 2008-10-08 | 2011-09-07 | 株式会社爱发科 | Evaporation material and method for producing evaporation material |
| CN102925688A (en) * | 2012-10-23 | 2013-02-13 | 鞍钢股份有限公司 | Method for refining high-purity ferrosilicon |
| CN104681225A (en) * | 2013-12-03 | 2015-06-03 | 湖南稀土金属材料研究院 | Treating method for improving performance of sintered NdFeB (neodymium iron boron) materials |
| CN103994663A (en) * | 2014-06-11 | 2014-08-20 | 沈阳飞机工业（集团）有限公司 | Method for prolonging service life of furnace lining of medium-frequency induction furnace |
| CN104557074A (en) * | 2014-12-01 | 2015-04-29 | 本钢板材股份有限公司 | Furnace-ramming ingredient of atmospheric-pressure medium-frequency furnace and preparation method of crucible |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110106334A (en) * | 2018-02-01 | 2019-08-09 | 福建省长汀金龙稀土有限公司 | One kind being carried out continuously grain boundary decision and heat-treating apparatus and method |
| CN109735687A (en) * | 2018-10-18 | 2019-05-10 | 福建省长汀金龙稀土有限公司 | One kind being carried out continuously grain boundary decision and heat-treating apparatus and method |
| CN111383833A (en) * | 2019-11-11 | 2020-07-07 | 浙江东阳东磁稀土有限公司 | Grain boundary diffusion method for rare earth neodymium iron boron magnet |
| CN112201466A (en) * | 2020-11-06 | 2021-01-08 | 亚星智联(厦门)科技有限公司 | Neodymium-iron-boron magnet modification device for grain boundary diffusion metal infiltration |
| CN112201466B (en) * | 2020-11-06 | 2024-05-28 | 亚星智联(厦门)科技有限公司 | Neodymium-iron-boron magnet modification device for grain boundary diffusion metal infiltration |
| CN112680695A (en) * | 2020-12-17 | 2021-04-20 | 中国科学院力学研究所 | Method for simultaneously improving coercivity and corrosion resistance of sintered neodymium iron boron |
| CN112680695B (en) * | 2020-12-17 | 2021-09-21 | 中国科学院力学研究所 | Method for simultaneously improving coercivity and corrosion resistance of sintered neodymium iron boron |
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Address after: Green pond road in Tonglu County of Hangzhou city of Zhejiang Province Zhang 311500 No. 168 Applicant after: Hangzhou Kede Magnetic Industry Co., Ltd. Address before: Zhang Qing Tang County Road Hangzhou city Zhejiang province 311500 No. 168 Applicant before: Hangzhou Kede Magnetic Industry Co., Ltd. |
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Application publication date: 20151223 |