JPH0630311B2 - Rare earth magnet manufacturing method - Google Patents
Rare earth magnet manufacturing methodInfo
- Publication number
- JPH0630311B2 JPH0630311B2 JP59092409A JP9240984A JPH0630311B2 JP H0630311 B2 JPH0630311 B2 JP H0630311B2 JP 59092409 A JP59092409 A JP 59092409A JP 9240984 A JP9240984 A JP 9240984A JP H0630311 B2 JPH0630311 B2 JP H0630311B2
- Authority
- JP
- Japan
- Prior art keywords
- rare earth
- ingot
- earth magnet
- diameter
- magnet manufacturing
- 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.)
- Expired - Lifetime
Links
- 229910052761 rare earth metal Inorganic materials 0.000 title claims description 11
- 150000002910 rare earth metals Chemical class 0.000 title claims description 11
- 238000004519 manufacturing process Methods 0.000 title claims description 4
- 239000000956 alloy Substances 0.000 claims description 5
- 229910045601 alloy Inorganic materials 0.000 claims description 5
- 230000008018 melting Effects 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 description 6
- 230000032683 aging Effects 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
- H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
- H01F1/047—Alloys characterised by their composition
- H01F1/053—Alloys characterised by their composition containing rare earth metals
- H01F1/055—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
- H01F1/0555—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 pressed, sintered or bonded together
- H01F1/0557—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 pressed, sintered or bonded together sintered
Landscapes
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Powder Metallurgy (AREA)
- Manufacturing Cores, Coils, And Magnets (AREA)
Description
【発明の詳細な説明】 〔技術分野〕 本発明は、希土類磁石の熱処理において、インゴット径
を５〜３０mmの範囲に規定することにより高性能な希土
類磁石を得る製造方法に係わる。Description: TECHNICAL FIELD The present invention relates to a method for producing a high-performance rare earth magnet by defining the ingot diameter in the range of 5 to 30 mm in the heat treatment of the rare earth magnet.
従来より希土類磁石の熱処理に関しては、多くの文献及
び特許がある。しかしそれらは、大部分、温度、時間、
雰囲気に関するものであり、処理インゴットの大きさに
特に言及した例は見あたらない。There are many documents and patents regarding the heat treatment of rare earth magnets. But they are mostly temperature, time,
As for the atmosphere, there is no specific reference to the size of the processed ingot.
本発明の目的は、希土類磁石の熱処理においてインゴッ
ト径を５〜３０mmの範囲に規定することにより、高性能
な希土類磁石を得ることにある。An object of the present invention is to obtain a high-performance rare earth magnet by defining the ingot diameter in the range of 5 to 30 mm in the heat treatment of the rare earth magnet.
希土類磁石の熱処理には、多くのファクターがある。つ
まり、焼結や溶体化処理での温度の厳密さ、あるいは希
土類金属が酸化しやすいことによる雰囲気制御等であ
る。これらはもっぱら処理インゴットの外部環境にコン
トロールを加えるものである。これに対して、本発明者
らは逆に処理インゴット自体に変化を加える（インゴッ
ト径を変化させる）ことにより、希土類磁石の熱処理が
より適正になり、高性能が得られることを発見した。There are many factors in heat treatment of rare earth magnets. That is, the strictness of the temperature in the sintering or solution treatment or the atmosphere control due to the easy oxidation of the rare earth metal. These exclusively add control to the external environment of the processing ingot. On the other hand, the present inventors have discovered that by conversely changing the treated ingot itself (changing the ingot diameter), the heat treatment of the rare earth magnet becomes more appropriate and high performance is obtained.
以下、本発明について実施例に基づき詳細に説明する。 Hereinafter, the present invention will be described in detail based on examples.
実施例１ 一般式でSm(Co 0.681 Cu0.08 Fe0.22 Ti0.019)8.0なる
合金を低周波溶解炉で溶解し合金インゴットを作成し
た。このインゴットを、径１〜５０mmの種々の大きさに
粗粉砕し、１１７０℃×２時間（１１７０℃は最適溶体
化温度である。）の溶体化処理を行った。その後、微粉
砕を行ない、１１９０℃×１時間で焼結後、８２０℃×
５時間の時効処理を行ない、特性を比較した。比較例は
通常粉砕のものでインゴット径１〜４０mm程度の混合物
である。Example 1 An alloy of Sm (Co0.681Cu0.08Fe0.22Ti0.019) 8.0 represented by the general formula was melted in a low frequency melting furnace to prepare an alloy ingot. This ingot was coarsely crushed into various sizes having a diameter of 1 to 50 mm and subjected to solution treatment at 1170 ° C. for 2 hours (1170 ° C. is the optimum solution temperature). After that, pulverization is performed, sintering is performed at 1190 ° C for 1 hour, and then 820 ° C x
After aging treatment for 5 hours, the characteristics were compared. The comparative example is a normally crushed mixture having a diameter of 1 to 40 mm.
以下に特性結果を示す。The characteristic results are shown below.
第１表に示すように、本発明により処理インゴットの径
を５〜３０mm程度に規定し、熱処理を行えば、ｉＨｃ，
ＳＱ，（ＢＨ）maxが大きく増している。第１表中、イ
ンゴット径１mmのＳＱが極端に低下しているのは、径が
小さいと表面積が増加し、Ｓｍの蒸発、酸化の影響が大
きく出るからと考えられる。As shown in Table 1, if the diameter of the treated ingot is regulated to about 5 to 30 mm according to the present invention and heat treatment is performed, iHc,
SQ and (BH) max are greatly increased. In Table 1, the SQ of the ingot having a diameter of 1 mm is extremely decreased, because the smaller the diameter is, the larger the surface area is and the larger the effect of evaporation and oxidation of Sm is.
実施例２ 一般式でSm(Co0.620 Cu0.060 Fe0.30 Hf0.020)7.4なる
合金を低周波溶解炉で溶解し合金インゴットを作成し
た。このインゴットを粗粉砕し径１０〜３０mmに大きさ
を規定したものと全く大きさを規定しないもの（径５０
mm以内だが不規則で径１mm程度の細粒も含む。）の２種
にわけ、溶体化処理を１１５５℃×２０時間、時効処理
を７８０℃×１２時間、行い、樹脂ボンド法により特性
評価を行つた後、１００℃における温度特性試験を行つ
た。 Example 2 An alloy of the general formula Sm (Co0.620Cu0.060Fe0.30Hf0.020) 7.4 was melted in a low frequency melting furnace to prepare an alloy ingot. This ingot is roughly crushed and the size is specified to be 10 to 30 mm, and the size is not specified at all (diameter 50
Includes fine particles with a diameter of about 1 mm but irregular within mm. ), The solution treatment was performed at 1155 ° C. for 20 hours, and the aging treatment was performed at 780 ° C. for 12 hours. The characteristics were evaluated by the resin bonding method, and then the temperature characteristics test was performed at 100 ° C.
以下に特性結果を示す。The characteristic results are shown below.
続いて、第１図に温度特性試験の結果を示す。第１図
は本発明品の結果であり、第１図は比較例である、従
来品の結果である。一般に樹脂ボンド磁石は、耐熱性が
悪いと考えられるが、本発明によれば、磁気特性だけで
なく耐熱性の改良も可能である。 Subsequently, FIG. 1 shows the result of the temperature characteristic test. FIG. 1 shows the result of the product of the present invention, and FIG. 1 shows the result of the conventional product, which is a comparative example. Generally, resin-bonded magnets are considered to have poor heat resistance, but according to the present invention, not only magnetic properties but also heat resistance can be improved.
以上、述べたように本発明によれば、磁気性能（エネル
ギー積，保磁力ｉＨｃ）と耐熱性の向上という効果を有
する。As described above, according to the present invention, the magnetic performance (energy product, coercive force iHc) and heat resistance are improved.
第１図は１００℃における、樹脂ボンド型希土類磁石の
安定性を示す。FIG. 1 shows the stability of the resin-bonded rare earth magnet at 100 ° C.
Claims (1)
の工程と、前記インゴットを粗粉砕して粗粉砕インゴッ
トを製造する第２の工程と、前記粗粉砕インゴットの溶
体化処理を行う第３の工程とを有し、前記第３の工程で
溶体化処理を行う前記粗粉砕インゴットの径を５〜３０
mmの範囲に規定することを特徴とする希土類磁石の製造
方法。1. A first method for producing an ingot by melting an alloy.
And a second step of coarsely crushing the ingot to produce a coarsely crushed ingot, and a third step of subjecting the coarsely crushed ingot to a solution treatment, the solution treatment being performed in the third step. The diameter of the coarsely crushed ingot to be treated is 5 to 30
A method for manufacturing a rare earth magnet, characterized in that it is specified in the range of mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59092409A JPH0630311B2 (en) | 1984-05-09 | 1984-05-09 | Rare earth magnet manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59092409A JPH0630311B2 (en) | 1984-05-09 | 1984-05-09 | Rare earth magnet manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60236206A JPS60236206A (en) | 1985-11-25 |
| JPH0630311B2 true JPH0630311B2 (en) | 1994-04-20 |
Family
ID=14053614
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59092409A Expired - Lifetime JPH0630311B2 (en) | 1984-05-09 | 1984-05-09 | Rare earth magnet manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0630311B2 (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5741536B2 (en) * | 1974-03-01 | 1982-09-03 |
-
1984
- 1984-05-09 JP JP59092409A patent/JPH0630311B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60236206A (en) | 1985-11-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |