CN106756446A - The hypoxemia rare earth steel preparation method of Rare-earth Iron intermediate alloy - Google Patents
The hypoxemia rare earth steel preparation method of Rare-earth Iron intermediate alloy Download PDFInfo
- Publication number
- CN106756446A CN106756446A CN201611169551.6A CN201611169551A CN106756446A CN 106756446 A CN106756446 A CN 106756446A CN 201611169551 A CN201611169551 A CN 201611169551A CN 106756446 A CN106756446 A CN 106756446A
- Authority
- CN
- China
- Prior art keywords
- rare
- rare earth
- earth
- iron
- intermediate alloy
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C35/00—Master alloys for iron or steel
- C22C35/005—Master alloys for iron or steel based on iron, e.g. ferro-alloys
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
Abstract
The invention discloses a kind of hypoxemia rare earth steel preparation method of Rare-earth Iron intermediate alloy, using vacuum smelting furnace, according to mass ratio 1~5：5~9 are put into the crucible in vacuum drying oven rare earth metal and pure iron；By vacuum stove evacuation in below 20Pa, inert gas shielding is then charged with, by high temperature melting refining, electromagnetic agitation alloying process, high temperature melting temperature is 1000~1500 DEG C, and the temperature that refining process is used is 1400~1500 DEG C, and the time is 5~15 minutes；Then it is cast in ingot mould and obtains Rare-earth Iron intermediate alloy.The present invention can significantly improve rare earth recovery rate, the content of accurate control steel middle rare earth, reduce the addition cost of rare earth, improve plasticity, low-temperature impact toughness, thickness directional properties and the decay resistance of steel.
Description
Technical field
The present invention relates to a kind of rare earth steel Rare-earth Iron intermediate alloy material, specifically, it is related to a kind of hypoxemia rare earth steel to use
The preparation method of Rare-earth Iron intermediate alloy.
Background technology
The beginning of the seventies in last century, the U.S. is to reduce the objectionable impurities in steel to the main purpose of rare earth steel application study, is carried
The degree of purity of Gao Gang；The mid-1970s, the mechanism of the rare earth in steel that just begun one's study on international level and effect.
China begins one's study rare earth steel early in the initial stage eighties, have studied the Adding Way of various rare earth in steel,
But effect is not very good, and rare earth steel additive has a single rare earth metal, norium, its shape have bulk, ingot shape,
The diversified forms such as thread, powdery, bar-shaped or core-spun yarn of the filling containing rare earth powder.But because rare earth metal is active, proportion is low
Yu Gang, it is difficult to be added in more than 1600 DEG C of molten steel, the scaling loss of rare earth is serious, and recovery rate is very low, it is difficult to improve the property of steel
Can, cause the production cost of rare earth steel too high, do not obtain market accreditation.
Accordingly, it would be desirable to explore prepare a kind of new rare earth ferroalloy, thus solve to restrict for a long time rare earth steel middle rare earth into
Sub-control system it is unstable and in being difficult to add steel, scaling loss is big, the low problem studied for many years of recovery rate.
The content of the invention
Technical problem solved by the invention is to provide a kind of preparation method of hypoxemia rare earth steel Rare-earth Iron intermediate alloy,
Effective addition of rare earth in steel can be at all solved the problems, such as after the addition of Rare-earth Iron intermediate alloy, rare earth recovery rate is significantly improved, it is accurate
Really the content of control steel middle rare earth, reduces the addition cost of rare earth, improves plasticity, low-temperature impact toughness, the thickness of steel
Degree directional performance and decay resistance.
Technical scheme is as follows：
A kind of hypoxemia rare earth steel preparation method of Rare-earth Iron intermediate alloy, including：
Using vacuum smelting furnace, according to mass ratio 1~5：5~9 rare earth metal and pure iron are put into the crucible in vacuum drying oven
In；
By vacuum stove evacuation in below 20Pa, inert gas shielding is then charged with, by high temperature melting-refining, electromagnetism
Stirring alloying process, high temperature melting temperature is 1000~1500 DEG C, and the temperature that refining process is used is 1400~1500 DEG C, when
Between be 5~15 minutes；Then it is cast in ingot mould and obtains Rare-earth Iron intermediate alloy.
Further：Rare earth metal uses lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, scandium, yttrium
In one or more.
Further：Very counted according to quality, Rare-earth Iron intermediate alloy Rare-Earth Content is 1~50%.
Further：Inert gas is using one or more in nitrogen, argon gas.
Further：With rare earth lanthanum and pure iron as raw material, according to mass percent 30：70 dispensings, are then added to carbon
In SiClx crucible, it is placed in vacuum drying oven, is evacuated to 20pa, be then charged with argon gas protection, being warming up to 1400 DEG C carries out melting, protects
The warm time is 15 minutes, electromagnetic agitation casting, and quick cooling has obtained lanthanum ferroalloy, lanthanum content 29.6% in lanthanum ferroalloy.
Further：With rare earth metal cerium and pure iron as raw material, according to mass percent 50：50 dispensings, are then added to carbon
In SiClx crucible, it is placed in vacuum drying oven, is evacuated to 20pa, be then charged with argon gas protection, being warming up to 1300 DEG C carries out melting, protects
The warm time is 15 minutes, electromagnetic agitation casting, and quick cooling has obtained cerium-iron alloy, cerium content 49.7% in cerium-iron alloy.
Further：With rare earth metal neodymium and pure iron as raw material, according to mass percent 40：60 dispensings, are then added to carbon
In SiClx crucible, it is placed in vacuum drying oven, is evacuated to 20pa, be then charged with argon gas protection, being warming up to 1350 DEG C carries out melting, protects
The warm time is 15 minutes, electromagnetic agitation casting, and quick cooling has obtained neodymium-iron alloy, neodymium content 39.4% in neodymium-iron alloy.
Further：With rare earth lanthanum, cerium and pure iron as raw material, according to mass percent 3.5：6.5：90 dispensings, then
It is added in silicon carbide crucible, is placed in vacuum drying oven, be evacuated to 20pa, be then charged with argon gas protection, is warming up to 1400 DEG C and enters
Row melting, soaking time is 15 minutes, electromagnetic agitation casting, and quick cooling has obtained mixed rare earth of lanthanum and cerium ferroalloy, and lanthanum cerium is mixed
Lanthanum content 3.42% in rare earth ferroalloy is closed, cerium content is 6.48%.
Further：Crucible is made up of isostatic pressed, highdensity boron nitride, and vacuum drying oven is vacuum intermediate-frequency, power frequency induction furnace.
Compared with prior art, the technology of the present invention effect includes：
1st, effective addition of rare earth in steel can be at all solved the problems, such as after the addition of Rare-earth Iron intermediate alloy, rare earth is significantly improved
Recovery rate, the content of accurate control steel middle rare earth, reduces the addition cost of rare earth, improves plasticity, the low temperature punching of steel
Hit toughness, thickness directional properties and decay resistance.
2nd, the Rare-earth Iron intermediate alloy rare earth elements proposed in the present invention exist in the form of compound state, inoxidizability
Good, heat endurance is high；The impurity contents such as alloy rare earth elements uniform ingredients stabilization, low segregation, O, S, P, C are low；In Rare-earth Iron
Between alloy density close to steel density, it is easy to be fused in steel, realize, to the deep purifying of molten steel, significantly improving smelting rare earth
The recovery rate of rare earth element during steel, greatly improves the product quality and combination property of rare earth steel, improve steel plasticity,
Low-temperature impact toughness, thickness directional properties and decay resistance, reduce production cost.Added by Rare-earth Iron intermediate alloy simultaneously
The rare earth element for entering expands the application field of rare earth in steel by dispersion-strengtherning, and particularly rare earth is in some sophisticated technologies high
Field is applied.And the secondary impurity content brought into is low, good product quality, fluctuation range is small, low production cost, is a kind of
Preferable rare earth steel additive.
3rd, increased substantially because Rare-earth Iron intermediate alloy is added to steel middle rare earth yield, so the cost of rare earth steel can be big
Width declines, and 12 latter stages can realize 1,000,000 tons/year of high-quality rare earth steel productions.Rare earth steel has superpower high-temp plastic, low
Warm impact resistance, thickness directional properties and decay resistance.Due to its excellent performance and rational production cost, the later stage can push away
5,000,000 tons of rare earth steel sheet materials of Baogang or even whole steel industry extensively are applied to, significant economic benefit can be produced.
To make full use of lanthanum in light rare earth, Ce elements to provide effective approach；Can develop with rare earth characteristic simultaneously
High-performance rare-earth steel kind, is that solid technical support has been established in rare earth steel production and application, promotes the at full speed of rare earth steel industry
Development.
Specific embodiment
Technical solution of the present invention is illustrated below with reference to example embodiment.However, example embodiment can be with various
Form is implemented, and is not understood as limited to implementation method set forth herein；Conversely, thesing embodiments are provided so that the present invention
More comprehensively and completely, and by the design of example embodiment those skilled in the art is comprehensively conveyed to.
The hypoxemia rare earth steel preparation method of Rare-earth Iron intermediate alloy, specifically includes following steps：
Step 1：Using vacuum smelting furnace, rare earth metal and pure iron are put into the crucible in vacuum drying oven according to proportioning；
Rare earth metal is using a kind of in lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, scandium, yttrium
Or it is several.Rare earth metal is 1~5 with the mass ratio of pure iron：5~9.Crucible is by isostatic pressed, highdensity anaerobic boron nitride system
Into vacuum smelting furnace uses vacuum intermediate-frequency, power frequency induction furnace.
Step 2：To vacuum stove evacuation, inert gas shielding is then charged with, by high temperature melting-refining, electromagnetic agitation
Alloying process, is then cast in ingot mould and obtains Rare-earth Iron intermediate alloy.
Very counted according to quality, Rare-earth Iron intermediate alloy Rare-Earth Content is 1~50%.Vacuum stove evacuation is existed
Below 20Pa.Inert gas is one or more in nitrogen, argon gas.
High temperature melting temperature is 1000~1500 DEG C, and the temperature that refining process is used is 1400~1500 DEG C, the time for 5~
15 minutes.
Embodiment 1
With rare earth lanthanum and pure iron as raw material, according to mass percent 30：70 dispensings, are then added to silicon carbide crucible
It is interior, it is placed in vacuum drying oven, 20pa is evacuated to, argon gas protection is then charged with, being warming up to 1400 DEG C carries out melting, and soaking time is
15 minutes, electromagnetic agitation casting, quick cooling obtained lanthanum ferroalloy, lanthanum content 29.6%.
Embodiment 2
With rare earth metal cerium and pure iron as raw material, according to mass percent 50：50 dispensings, are then added to silicon carbide crucible
It is interior, it is placed in vacuum drying oven, 20pa is evacuated to, argon gas protection is then charged with, being warming up to 1300 DEG C carries out melting, and soaking time is
15 minutes, electromagnetic agitation casting, quick cooling obtained cerium-iron alloy, cerium content 49.7%.
Embodiment 3
With rare earth metal neodymium and pure iron as raw material, according to mass percent 40：60 dispensings, are then added to silicon carbide crucible
It is interior, it is placed in vacuum drying oven, 20pa is evacuated to, argon gas protection is then charged with, being warming up to 1350 DEG C carries out melting, and soaking time is
15 minutes, electromagnetic agitation casting, quick cooling obtained neodymium-iron alloy, neodymium content 39.4%.
Embodiment 4
With rare earth lanthanum, cerium and pure iron as raw material, according to mass percent 3.5：6.5：90 dispensings, are then added to carbon
In SiClx crucible, it is placed in vacuum drying oven, is evacuated to 20pa, be then charged with argon gas protection, being warming up to 1400 DEG C carries out melting, protects
The warm time is 15 minutes, electromagnetic agitation casting, and quick cooling has obtained mixed rare earth of lanthanum and cerium ferroalloy, lanthanum content 3.42%, cerium
Content 6.48%.
Term used herein is explanation and exemplary and nonrestrictive term.Because the present invention can be with various
Form specific implementation without deviating from invention it is spiritual or substantive, it should therefore be appreciated that above-described embodiment be not limited to it is any foregoing
Details, and widely being explained in the spirit and scope that should be limited in appended claims, thus fall into claim or its etc.
Whole changes and remodeling in the range of effect all should be appended claims and covered.
Claims (9)
1. a kind of hypoxemia rare earth steel preparation method of Rare-earth Iron intermediate alloy, including：
Using vacuum smelting furnace, according to mass ratio 1~5：5~9 are put into the crucible in vacuum drying oven rare earth metal and pure iron；
By vacuum stove evacuation in below 20Pa, inert gas shielding is then charged with, by high temperature melting-refining, electromagnetic agitation
Alloying process, high temperature melting temperature is 1000~1500 DEG C, and the temperature that refining process is used is 1400~1500 DEG C, and the time is
5~15 minutes；Then it is cast in ingot mould and obtains Rare-earth Iron intermediate alloy.
2. the hypoxemia rare earth steel as claimed in claim 1 preparation method of Rare-earth Iron intermediate alloy, it is characterised in that：Rare earth metal
Using in lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, scandium, yttrium one or more.
3. the hypoxemia rare earth steel as claimed in claim 1 preparation method of Rare-earth Iron intermediate alloy, it is characterised in that：According to quality
Very count, Rare-earth Iron intermediate alloy Rare-Earth Content is 1~50%.
4. the hypoxemia rare earth steel as claimed in claim 1 preparation method of Rare-earth Iron intermediate alloy, it is characterised in that：Inert gas
Using one or more in nitrogen, argon gas.
5. the hypoxemia rare earth steel as claimed in claim 1 preparation method of Rare-earth Iron intermediate alloy, it is characterised in that：With rare earth gold
Category lanthanum and pure iron are raw material, according to mass percent 30：70 dispensings, are then added in silicon carbide crucible, are placed in vacuum drying oven,
20pa is evacuated to, argon gas protection is then charged with, being warming up to 1400 DEG C carries out melting, and soaking time is 15 minutes, electromagnetic agitation
Casting, quick cooling, has obtained lanthanum ferroalloy, lanthanum content 29.6% in lanthanum ferroalloy.
6. the hypoxemia rare earth steel as claimed in claim 1 preparation method of Rare-earth Iron intermediate alloy, it is characterised in that：With rare earth gold
Category cerium and pure iron are raw material, according to mass percent 50：50 dispensings, are then added in silicon carbide crucible, are placed in vacuum drying oven,
20pa is evacuated to, argon gas protection is then charged with, being warming up to 1300 DEG C carries out melting, and soaking time is 15 minutes, electromagnetic agitation
Casting, quick cooling, has obtained cerium-iron alloy, cerium content 49.7% in cerium-iron alloy.
7. the hypoxemia rare earth steel as claimed in claim 1 preparation method of Rare-earth Iron intermediate alloy, it is characterised in that：With rare earth gold
Category neodymium and pure iron are raw material, according to mass percent 40：60 dispensings, are then added in silicon carbide crucible, are placed in vacuum drying oven,
20pa is evacuated to, argon gas protection is then charged with, being warming up to 1350 DEG C carries out melting, and soaking time is 15 minutes, electromagnetic agitation
Casting, quick cooling, has obtained neodymium-iron alloy, neodymium content 39.4% in neodymium-iron alloy.
8. the hypoxemia rare earth steel as claimed in claim 1 preparation method of Rare-earth Iron intermediate alloy, it is characterised in that：With rare earth gold
Category lanthanum, cerium and pure iron are raw material, according to mass percent 3.5：6.5：90 dispensings, are then added in silicon carbide crucible, are placed in
In vacuum drying oven, 20pa is evacuated to, is then charged with argon gas protection, being warming up to 1400 DEG C carries out melting, and soaking time is 15 minutes,
Electromagnetic agitation is cast, quick cooling, has obtained mixed rare earth of lanthanum and cerium ferroalloy, lanthanum content in mixed rare earth of lanthanum and cerium ferroalloy
3.42%, cerium content is 6.48%.
9. the hypoxemia rare earth steel as claimed in claim 1 preparation method of Rare-earth Iron intermediate alloy, it is characterised in that：Crucible passes through
Isostatic pressed, highdensity boron nitride are made, and vacuum drying oven is vacuum intermediate-frequency, power frequency induction furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611169551.6A CN106756446A (en) | 2016-12-16 | 2016-12-16 | The hypoxemia rare earth steel preparation method of Rare-earth Iron intermediate alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611169551.6A CN106756446A (en) | 2016-12-16 | 2016-12-16 | The hypoxemia rare earth steel preparation method of Rare-earth Iron intermediate alloy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106756446A true CN106756446A (en) | 2017-05-31 |
Family
ID=58892350
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611169551.6A Pending CN106756446A (en) | 2016-12-16 | 2016-12-16 | The hypoxemia rare earth steel preparation method of Rare-earth Iron intermediate alloy |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106756446A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108152355A (en) * | 2017-11-02 | 2018-06-12 | 山东非金属材料研究所 | A kind of rare earth pyrophoric alloy Standard Reference Materials for Determination and preparation method thereof |
| CN108517457A (en) * | 2018-05-15 | 2018-09-11 | 鞍钢股份有限公司 | A kind of Rare Earth Lanthanum, cerium alloy and preparation method thereof |
| CN110538478A (en) * | 2018-10-29 | 2019-12-06 | 天津包钢稀土研究院有限责任公司 | High-quality anhydrous rare earth halide purification device |
| CN111197137A (en) * | 2018-11-16 | 2020-05-26 | 上海永烨冶金科技发展有限公司 | Lanthanum-cerium alloy of rare earth and preparation method thereof |
| CN114107709A (en) * | 2022-01-24 | 2022-03-01 | 中天捷晟(天津)新材料科技有限公司 | Terbium-iron alloy preparation method |
| CN114395720A (en) * | 2022-01-18 | 2022-04-26 | 华中科技大学 | Preparation method of nano-oxide dispersion strengthened steel |
| CN115948687A (en) * | 2022-12-20 | 2023-04-11 | 浙江英洛华磁业有限公司 | Method and equipment for rapidly smelting and casting iron-based alloy containing rare earth |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102373360A (en) * | 2011-11-03 | 2012-03-14 | 内蒙古包钢钢联股份有限公司 | Fe-La intermediate alloy for rare earth addition into steel and manufacture method thereof |
| CN103614614A (en) * | 2013-11-25 | 2014-03-05 | 内蒙古包钢钢联股份有限公司 | Lanthanum-iron alloy for rare earth steel production |
| CN103820698A (en) * | 2014-03-11 | 2014-05-28 | 包头稀土研究院 | Rare earth iron intermediate alloy and application thereof |
-
2016
- 2016-12-16 CN CN201611169551.6A patent/CN106756446A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102373360A (en) * | 2011-11-03 | 2012-03-14 | 内蒙古包钢钢联股份有限公司 | Fe-La intermediate alloy for rare earth addition into steel and manufacture method thereof |
| CN103614614A (en) * | 2013-11-25 | 2014-03-05 | 内蒙古包钢钢联股份有限公司 | Lanthanum-iron alloy for rare earth steel production |
| CN103820698A (en) * | 2014-03-11 | 2014-05-28 | 包头稀土研究院 | Rare earth iron intermediate alloy and application thereof |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108152355A (en) * | 2017-11-02 | 2018-06-12 | 山东非金属材料研究所 | A kind of rare earth pyrophoric alloy Standard Reference Materials for Determination and preparation method thereof |
| CN108517457A (en) * | 2018-05-15 | 2018-09-11 | 鞍钢股份有限公司 | A kind of Rare Earth Lanthanum, cerium alloy and preparation method thereof |
| CN108517457B (en) * | 2018-05-15 | 2021-01-08 | 鞍钢股份有限公司 | Preparation method of rare earth-containing alloy |
| CN110538478A (en) * | 2018-10-29 | 2019-12-06 | 天津包钢稀土研究院有限责任公司 | High-quality anhydrous rare earth halide purification device |
| CN111197137A (en) * | 2018-11-16 | 2020-05-26 | 上海永烨冶金科技发展有限公司 | Lanthanum-cerium alloy of rare earth and preparation method thereof |
| CN114395720A (en) * | 2022-01-18 | 2022-04-26 | 华中科技大学 | Preparation method of nano-oxide dispersion strengthened steel |
| US11590613B1 (en) | 2022-01-18 | 2023-02-28 | Huazhong University Of Science And Technology | Preparation method of nano-oxide dispersion strengthened steel |
| CN114107709A (en) * | 2022-01-24 | 2022-03-01 | 中天捷晟(天津)新材料科技有限公司 | Terbium-iron alloy preparation method |
| CN114703387A (en) * | 2022-01-24 | 2022-07-05 | 中天捷晟(天津)新材料科技有限公司 | Terbium-iron alloy preparation method |
| CN115948687A (en) * | 2022-12-20 | 2023-04-11 | 浙江英洛华磁业有限公司 | Method and equipment for rapidly smelting and casting iron-based alloy containing rare earth |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106756446A (en) | The hypoxemia rare earth steel preparation method of Rare-earth Iron intermediate alloy | |
| WO2014079188A1 (en) | Zirconium-based amorphous alloy | |
| KR102631761B1 (en) | Neodymium iron boron magnetic material, raw material composition, manufacturing method and application | |
| CN103820698A (en) | Rare earth iron intermediate alloy and application thereof | |
| CN105405555B (en) | A kind of sintered Nd-Fe-B permanent magnetic material of the holmium containing cerium | |
| KR102632991B1 (en) | Neodymium iron boron magnetic material, raw material composition, manufacturing method and application | |
| CN104575901A (en) | Neodymium iron boron magnet added with terbium powder and preparation method thereof | |
| WO2014059769A1 (en) | Zirconium-based amorphous alloy | |
| JP2023511777A (en) | Neodymium-iron-boron magnet material, raw material composition, manufacturing method, and application | |
| CN104575902A (en) | Neodymium iron boron magnet added with cerium and preparation method thereof | |
| CN115181869A (en) | Method for producing nickel-based high-temperature alloy containing Y, ce, la and Nd | |
| CN103617855A (en) | Neodymium iron boron magnetic material with excellent magnetic performance | |
| CN111957911B (en) | Heat preservation power adjusting method during neodymium iron boron smelting and casting | |
| CN103617856A (en) | Neodymium iron boron magnetic material strong in corrosion resistance | |
| CN113053606A (en) | Graphene rare earth permanent magnetic material and preparation method thereof | |
| CN108400009A (en) | A kind of method that grain boundary decision prepares high-coercive force bulk manganese bismuth nanomagnets | |
| CN103617854A (en) | Neodymium iron boron magnetic material with high coercivity | |
| CN102296228A (en) | Permanent magnet alloy block added with carbon and preparation method for permanent magnet alloy block | |
| WO2019056643A1 (en) | Method for producing neodymium-iron-boron composite magnetic material | |
| JP7234326B2 (en) | Manufacturing method of high-performance neodymium-iron-boron isotropic magnetic powder | |
| CN107419157B (en) | A method of Nd Fe B alloys are smelted with reduced iron powder substitution pure iron | |
| JP2021075787A (en) | Anisotropic bonded magnetic powder and preparation method thereof | |
| CN109972027A (en) | A method of mutually adding preparation anisotropy CeFeB permanent-magnet alloy by low melting point PrCu intergranular | |
| CN106158211B (en) | A kind of high-performance Ne-Fe-B RE permanent magnetic alloy and preparation method thereof | |
| CN114107709A (en) | Terbium-iron alloy preparation method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170531 |
|
| RJ01 | Rejection of invention patent application after publication |