CN100432271C - Iron-based bulk amorphous alloy having hard magnetism and method for preparing same - Google Patents
Iron-based bulk amorphous alloy having hard magnetism and method for preparing same Download PDFInfo
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- CN100432271C CN100432271C CNB2007100373971A CN200710037397A CN100432271C CN 100432271 C CN100432271 C CN 100432271C CN B2007100373971 A CNB2007100373971 A CN B2007100373971A CN 200710037397 A CN200710037397 A CN 200710037397A CN 100432271 C CN100432271 C CN 100432271C
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- amorphous alloy
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Abstract
The invention discloses a non-crystal alloy of ferric block with hard magnetism, which comprises the following parts: 40-63% Fe, 30-37% Nd, 4-10% Al, 2-8% B and 0.5- 6% Dy. The making method comprises the following steps: (1) allocating raw material according to formula; fusing with current density at 100-220A/cm2; turning over mother alloy for several times; (2) casting through copper mould suction adsorbing method; obtaining the product with higher coercitive force to 500kA/m.
Description
Technical field
The present invention relates to a kind of iron-base large-block amorphous alloy, belong to the magnetic alloy material technical field with hard magnetic.
Background technology
Adopt the spray gun method to obtain non-crystalline state Au first from people such as nineteen sixty Duwez
70Si
30Since the alloy, amorphous alloy has obtained significant progress in theoretical Research And Engineering application facet.Amorphous alloy all needed to obtain by the method for melt-spun at the initial stage of development.Because need very high rate of cooling (10
5More than the K/s), the three-dimensional dimension of amorphous alloy is very restricted, and can only obtain very thin or very thin sheet, silk and Powdered non-crystaline amorphous metal.This makes amorphous be subjected to very big restriction when practical application.
For the restriction of the shape and size that overcome amorphous alloy material, people made unremitting effort for the preparation bulk amorphous alloys over surplus in the of nearly ten years.In recent years, obtained than quantum jump in the research field of three-dimensional large size bulk amorphous alloy, utilizing Zr-Al-Ni-Cu is that mother metal has prepared the amorphous bar that diameter reaches 15mm, is that mother metal has prepared the amorphous bar that diameter reaches 75mm with Pd-Ni-P.
Nineteen ninety-five, people have prepared the Nd base noncrystal alloy of bulk, and its good amorphous formation ability and at room temperature show as hard magnetic has caused the attention of Many researchers.But the based bulk amorphous saturation magnetization of Nd is very low, has limited application to a certain extent.
Nineteen ninety-five, the Tokyo University Inoue seminar of Japan found Fe-(Al, Ga)-(P, C, B, Ge, Si) system is iron-base large-block amorphous, and prepares Fe-(Co in 1997 with copper mold casting method, Ni) one (Zr, Hf, Nb)-and the B non-crystaline amorphous metal, these alloys all have certain soft magnetic performance.From 1998, people such as Zhang Wei have added a spot of Dy in the system of Fe-Co-Nd-B, its supercooling liquid phase region is broadened, large block amorphous formation ability strengthens, and after adding Dy, material hard magnetic performance is strengthened, and perhaps shows as soft magnetism at ambient temperature, and makes it have hard magnetic after annealing.They have also attempted Fe
90-x-yCo
xLn
yB
20(Ln=Nd, Sm, Tb or Dy) system, large block amorphous size is approximately 0.5～1.0mm, wherein Fe
66.5Co
10Pr
3.5B
20Be of a size of 0.75mm, after annealing, make it have stronger hard magnetic.In the Fe base large amorphous alloy of report was arranged, best hard magnetic result was coercive force jHc=263kA/m.
During the 2005-2006, people such as J.M.Park report Fe-Nb-B-Y, and (Zr Co) has good amorphous formation ability and soft magnetism.2006, Taiwan T.S.Chin report ternary system Fe-B-Y in very large range can form amorphous, and have soft magnetism.
Summary of the invention
The purpose of this invention is to provide a kind of iron-base large-block amorphous alloy and preparation method thereof with hard magnetic.
The objective of the invention is to realize by following technique means.
A kind of iron-base large-block amorphous alloy with hard magnetic is characterized in that the composition of this alloy, counts with atomic percentage conc:
Nd 30～37％
Al 4～10％
B 2～8％
Dy 0.5～6％。
The preparation method of above-mentioned iron-base large-block amorphous alloy is characterized in that this method has following processing step:
A. technical pure raw metal Fe, Nd, Al, Dy and FeB alloy are pressed Fe base large amorphous alloy composition; count with atomic percentage conc: Fe 40～63%, Nd 30～37%, Al 4～10%, B 2～8%, Dy0.5～6% are prepared burden; carry out melting with vacuum non-consumable arc furnace under argon shield then, the melting current density is 100～220A/cm
2, molten alloy is stood up melting 3～5 times;
B. adopt the cast of copper mold negative pressure suction casting method, make iron-base large-block amorphous alloy with hard magnetic.
Used raw material is pure Fe, Nd, Al, Dy and FeB master alloy among the present invention.
Alloy of the present invention has amorphous formation ability preferably, and at room temperature shows as good hard magnetic, its coercive force jHc ≈ 500kA/m.The test result of this magnetic property has bigger coercive force than the Fe base large amorphous alloy of resulting other system of being reported in the document of employing copper mold negative pressure suction casting method.
Characteristics of the present invention are: 1) special alloy formula; 2) use very simple technology mode, obtain having the Fe base large amorphous alloy with good hard magnetic of large-size.
The present invention has hard magnetic preferably, can be widely used in the magnetic device in fields such as information, communication, computer.This Fe base large amorphous alloy with hard magnetic further enlarges Application Areas because its easy technology can overcome existing magneticsubstance complete processing complexity, the restricted problem of component size.
Description of drawings
Fig. 1 is iron-base large-block amorphous alloy of the present invention magnetic hysteresis loop figure at room temperature.
Embodiment
After now embodiments of the invention specifically being described in.
Embodiment 1
The composition (atomic percentage conc) of the iron-base large-block amorphous alloy with hard magnetic of present embodiment is: Fe 52%, Nd 37%, Al 6%, B 4%, Dy 1%.Preparation process is as follows with step: technical pure raw metal Fe, Nd, Al, Dy and FeB alloy are become assignment system 20 grams by the Fe base large amorphous alloy of present embodiment; carry out melting with vacuum non-consumable arc furnace under argon shield then, the melting current density is 150A/cm
2, molten alloy is stood up melting 4 times; Adopt the cast of copper mold negative pressure suction casting method, obtain being of a size of the block amorphous alloy of 1mm * 10mm * 80mm.
Prepared iron-base large-block amorphous alloy magnetic property is at room temperature seen accompanying drawing 1 in the present embodiment.Can find out the coercive force jHc ≈ 500kA/m of iron-base large-block amorphous alloy of the present invention from accompanying drawing, its agnetic property at room temperature m is better than the magnetic property of the iron-base large-block amorphous alloy of existing report greatly.
Embodiment 2
The composition (atomic percentage conc) of the iron-base large-block amorphous alloy with hard magnetic of present embodiment is: Fe 57%, Nd 30%, Al 4%, B 6%, Dy 3%.Preparation process is as follows with step: technical pure raw metal Fe, Nd, Al, Dy and FeB alloy are become assignment system 30 grams by the Fe base large amorphous alloy of present embodiment; carry out melting with vacuum non-consumable arc furnace under argon shield then, the melting current density is 200A/cm
2, molten alloy is stood up melting 4 times; Adopt the cast of copper mold negative pressure suction casting method, obtain being of a size of the block amorphous alloy of 1mm * 10mm * 80mm.
The coercive force jHc ≈ 436kA/m of prepared iron-base large-block amorphous alloy in the present embodiment is better than the coercive force of the iron-base large-block amorphous alloy of existing report greatly.
Claims (2)
1. iron-base large-block amorphous alloy with hard magnetic is characterized in that the composition of this alloy, counts with atomic percentage conc:
Fe 40～63％
Nd 30～37％
Al 4～10％
B 2～8％
Dy 0.5～6％。
2. one kind is used for the described preparation method with iron-base large-block amorphous alloy of hard magnetic of claim 1, it is characterized in that this method has following processing step:
A. with technical pure raw metal Fe, Nd, Al, Dy and FeB alloy; count with atomic percentage conc by Fe base large amorphous alloy composition: Fe 40～63%, Nd 30～37%, Al 4～10%, B 2～8%, Dy 0.5～6% prepare burden; carry out melting with vacuum non-consumable arc furnace under argon shield then, the melting current density is 100～220A/cm
2, molten alloy is stood up melting 3～5 times;
B. adopt the cast of copper mold negative pressure suction casting method, make iron-base large-block amorphous alloy with hard magnetic.
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| CN100432271C true CN100432271C (en) | 2008-11-12 |
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| CN101673605B (en) * | 2008-09-08 | 2011-12-07 | 南京理工大学 | Anisotropic nano/amorphous complex phase block permanent-magnetic material and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1440317A (en) * | 2000-10-06 | 2003-09-03 | 株式会社三德 | Process for producing, through strip casting, raw alloy for nanocomposite type permanent magnet |
| CN1514035A (en) * | 2002-12-31 | 2004-07-21 | 中国科学院物理研究所 | Iron base large block non crystalline alloy |
| JP2004339527A (en) * | 2003-03-20 | 2004-12-02 | Neomax Co Ltd | Method of producing hot molded type nanocomposite magnet |
-
2007
- 2007-02-09 CN CNB2007100373971A patent/CN100432271C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1440317A (en) * | 2000-10-06 | 2003-09-03 | 株式会社三德 | Process for producing, through strip casting, raw alloy for nanocomposite type permanent magnet |
| CN1514035A (en) * | 2002-12-31 | 2004-07-21 | 中国科学院物理研究所 | Iron base large block non crystalline alloy |
| JP2004339527A (en) * | 2003-03-20 | 2004-12-02 | Neomax Co Ltd | Method of producing hot molded type nanocomposite magnet |
Non-Patent Citations (2)
| Title |
|---|
| Nd60Fe20Al10-xCo10Bx 非晶合金的结构、磁性能和晶化行为的研究. 谭晓华，徐晖等.稀有金属材料与工程，第34卷第3期. 2005 |
| Nd60Fe20Al10-xCo10Bx 非晶合金的结构、磁性能和晶化行为的研究. 谭晓华，徐晖等.稀有金属材料与工程，第34卷第3期. 2005 * |
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Granted publication date: 20081112 Termination date: 20110209 |