JPS6283401A - Magnetic powder for electromagnetic clutch and brake and its production - Google Patents
Magnetic powder for electromagnetic clutch and brake and its productionInfo
- Publication number
- JPS6283401A JPS6283401A JP60221975A JP22197585A JPS6283401A JP S6283401 A JPS6283401 A JP S6283401A JP 60221975 A JP60221975 A JP 60221975A JP 22197585 A JP22197585 A JP 22197585A JP S6283401 A JPS6283401 A JP S6283401A
- Authority
- JP
- Japan
- Prior art keywords
- powder
- magnetic
- amorphous alloy
- electromagnetic clutch
- brake
- 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
- 239000006247 magnetic powder Substances 0.000 title claims abstract description 41
- 238000004519 manufacturing process Methods 0.000 title claims 2
- 239000000843 powder Substances 0.000 claims abstract description 63
- 229910000808 amorphous metal alloy Inorganic materials 0.000 claims abstract description 37
- 229910001004 magnetic alloy Inorganic materials 0.000 claims abstract description 11
- 238000000227 grinding Methods 0.000 claims abstract description 5
- 239000006249 magnetic particle Substances 0.000 claims description 10
- 239000002184 metal Substances 0.000 claims description 7
- 229910052751 metal Inorganic materials 0.000 claims description 7
- 239000002994 raw material Substances 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 abstract description 19
- 229910045601 alloy Inorganic materials 0.000 abstract description 9
- 239000000956 alloy Substances 0.000 abstract description 9
- 230000005284 excitation Effects 0.000 abstract description 7
- 229910052742 iron Inorganic materials 0.000 abstract description 5
- 230000004044 response Effects 0.000 abstract description 5
- 239000006185 dispersion Substances 0.000 abstract description 3
- 230000005389 magnetism Effects 0.000 abstract description 3
- 238000005096 rolling process Methods 0.000 abstract description 3
- 238000001816 cooling Methods 0.000 abstract description 2
- 238000010494 dissociation reaction Methods 0.000 abstract description 2
- 230000005593 dissociations Effects 0.000 abstract description 2
- 241000276425 Xiphophorus maculatus Species 0.000 abstract 1
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 239000000155 melt Substances 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 22
- 239000002245 particle Substances 0.000 description 12
- 230000004907 flux Effects 0.000 description 8
- 239000012530 fluid Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000005415 magnetization Effects 0.000 description 5
- 230000007797 corrosion Effects 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 238000000635 electron micrograph Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 238000000498 ball milling Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012776 electronic material Substances 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000008204 material by function Substances 0.000 description 1
- 239000005300 metallic glass Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000004043 responsiveness Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000009692 water atomization Methods 0.000 description 1
Landscapes
- Powder Metallurgy (AREA)
- Soft Magnetic Materials (AREA)
- Braking Arrangements (AREA)
Abstract
Description
【発明の詳細な説明】
１）発明の属する技術分野
この発明は、内燃機関等の原動機に発生する動力を伝達
制御する磁粉式電磁クラッチあるいはブレーキにおいて
動力伝達の媒体として使用される磁性粉末に関する。DETAILED DESCRIPTION OF THE INVENTION 1) Technical field to which the invention pertains The present invention relates to magnetic powder used as a power transmission medium in a magnetic powder type electromagnetic clutch or brake that transmits and controls the power generated in a prime mover such as an internal combustion engine.
２）従来技術と問題点
内燃機関等に発生する動力は、流体継手や電磁クラッチ
等の動力伝達装置を介して伝達制御されて利用されてい
る。2) Prior Art and Problems The power generated by an internal combustion engine or the like is used after being transmitted and controlled through a power transmission device such as a fluid coupling or an electromagnetic clutch.
この種の動力伝達装置には、機能上、伝達制御が容易に
なされるとともに伝達効率が良好であることが要求され
、自動車等においては、特にイーシイドライブの観点か
ら、動力伝達媒体として流体のみを使用する流体式トル
クコンバータが多用されている。この種の流体式トルク
コンバータは、動力側と負荷側との回転数比に応じて変
速制御が可能であり、また、流体を介して動力が伝達さ
れるだめに衝撃力の発生がない等の特徴を有しているが
、動力側と負荷側とに滑りを伴うために動力伝達効率お
よび応答性の点で若干の難点を有している。Functionally, this type of power transmission device is required to be able to easily control transmission and have good transmission efficiency.In automobiles, etc., especially from the viewpoint of easy drive, only fluid is used as the power transmission medium. Hydrodynamic torque converters are widely used. This type of fluid torque converter is capable of speed change control according to the rotational speed ratio between the power side and the load side, and also has features such as no impact force being generated because the power is transmitted through fluid. However, it has some drawbacks in terms of power transmission efficiency and responsiveness because it involves slipping on the power side and the load side.
一方、近年、磁性粉末を動力側と負荷側との間に介在さ
せ、これを磁化させて動力（１〜ルク）伝達の媒体とす
る磁粉式電磁クラッチやブレーキが提案され一部実用に
供されている。この種の磁粉式電磁クラッチ等は、原理
的には励磁電流の大きさに比例したトルク伝達容量を得
ることができ、無段階でのトルク伝達制御をおこなうこ
とができる利点を有している。従来この種の電磁クラッ
チには、動力伝達媒体として粒径が２５０メツシユ以下
の５ｔＪＳ４１０が使用されているが、磁粉式電磁クラ
ッチに従来使用されているこの種の鉄粉は、保磁力およ
び鉄損が大きく、励磁電流の通電を停止したときにも残
留磁気を示し、粉末の分散特性や流動特性が充分に得ら
れず、また、粉末か微粉化され易く伝達トルクの応答に
経時変化が生じ、良好な動力伝達制御の応答特性を得る
」−で難点を有している。On the other hand, in recent years, magnetic powder-type electromagnetic clutches and brakes have been proposed, in which magnetic powder is interposed between the power side and the load side, and this is magnetized to serve as a medium for transmitting power (1 to 1 lux), and some of them have been put into practical use. ing. This type of magnetic particle type electromagnetic clutch and the like has the advantage that, in principle, it is possible to obtain a torque transmission capacity that is proportional to the magnitude of the excitation current, and that it is possible to perform stepless torque transmission control. Conventionally, this type of electromagnetic clutch uses 5t JS410 with a particle size of 250 mesh or less as a power transmission medium. is large and exhibits residual magnetism even when the excitation current is stopped, making it difficult to obtain sufficient powder dispersion and flow characteristics, and the powder is easily pulverized, causing changes in the transmission torque response over time. However, there are difficulties in obtaining good power transmission control response characteristics.
３）発明の目的
この発明は、上記に鑑み、改良された磁粉式電磁クラッ
チまたはブレーキ用磁性粉末を提供することを目的とし
てなされてものである。3) Purpose of the Invention In view of the above, the present invention has been made for the purpose of providing an improved magnetic powder type electromagnetic clutch or brake.
４）発明の構成および効果
この発明では磁粉式電磁クラッチあるいはブレーキに使
用する磁性粉末として、硬度Ｈｖ ７００以上の非晶質
合金粉末でなり、Ｈつ該非晶質合金粉末が長径１０〜１
５０μｍ、アスペクト比６以下であり外周に角部を有さ
ない板状または種球状の非晶質金属粉末を用いることで
、上記の目的を達成する。4) Structure and Effects of the Invention In this invention, the magnetic powder used in a magnetic particle type electromagnetic clutch or brake is an amorphous alloy powder with a hardness of Hv 700 or more, and the amorphous alloy powder has a major axis of Hv 10 to 1.
The above object is achieved by using a plate-like or seed-spherical amorphous metal powder having a diameter of 50 μm and an aspect ratio of 6 or less and having no corners on the outer periphery.
溶融金属を急冷凝固させて得られる非晶質合金は、磁気
的、化学的、機械的特性において特異な特性を示すこと
から各種の機能材料として注目されている。特に磁気的
特性に関しては、結晶異方性を示さないので軟質磁性材
料として注１」され、特にＦｅ系非晶質合金は高磁束密
度、低保磁力、低鉄損などの特性を示し、また、ＣＯ系
非晶質合金は高透磁率、低保磁力、低鉄損などの特性を
示−３＝
す材料として電子材料として実用化が進められている。Amorphous alloys obtained by rapidly solidifying molten metals have attracted attention as various functional materials because they exhibit unique magnetic, chemical, and mechanical properties. In particular, regarding magnetic properties, it is classified as a soft magnetic material because it does not exhibit crystal anisotropy. In particular, Fe-based amorphous alloys exhibit properties such as high magnetic flux density, low coercive force, and low core loss. , CO-based amorphous alloys are being put into practical use as electronic materials as materials that exhibit characteristics such as high magnetic permeability, low coercive force, and low iron loss.
発明者等は、この種の非晶質磁性合金を粉末とし粉末粒
の形状調整をおこない所定の粒状体とした非晶質合金粉
末か、磁粉式電磁クラッチおよびブレーキ用磁性粉末と
して有効であることを見出した。The inventors have made this type of amorphous magnetic alloy into powder, adjusted the shape of the powder grains, and made the amorphous alloy powder into a predetermined granular body, which is effective as magnetic powder for magnetic powder-type electromagnetic clutches and brakes. I found out.
磁粉式電磁クラッチおよびブレーキ（以下、磁粉式電磁
クラッチおよびブレーキを単に磁粉式電磁クラッチとい
う。）においては、動力伝達媒体となる磁性粉末の磁気
的および機械的特性ならびに磁性粉末の形状が極めて重
要である。即ち、磁粉式電磁クラッチに使用される磁性
粉末は、動力側と負荷側との間で励磁電流により磁化さ
れて凝集固着し、動力側からの動力を負荷側に伝達する
機能を果たす。したがって、この種の磁性粉末には、■
飽和磁束密度が大きいこと、■励磁電流により容易に磁
化されること、が必要である。また、磁性粉末は磁界中
において複雑に運動するので磁化の反転が容易になされ
ることおよび励磁電流の通電を停止したときには完全に
消磁された状態になることが必要である。したがって、
この種用途の磁性粉末は、■鉄損が少なく、保磁力（ｔ
ｉｅ）の小さいものであること が必要である。In magnetic particle type electromagnetic clutches and brakes (hereinafter, magnetic particle type electromagnetic clutches and brakes are simply referred to as magnetic particle type electromagnetic clutches), the magnetic and mechanical properties of the magnetic powder that serves as the power transmission medium and the shape of the magnetic powder are extremely important. be. That is, the magnetic powder used in the magnetic powder type electromagnetic clutch is magnetized by an exciting current between the power side and the load side, and is coagulated and fixed, and functions to transmit power from the power side to the load side. Therefore, this kind of magnetic powder has ■
It is necessary to have a high saturation magnetic flux density, and (1) to be easily magnetized by an excitation current. Furthermore, since the magnetic powder moves in a complicated manner in a magnetic field, it is necessary that the magnetization be easily reversed and that it be in a completely demagnetized state when the excitation current is stopped. therefore,
Magnetic powder for this type of use has ■ low iron loss and coercive force (t
ie) is required to be small.
更に、磁粉式電磁クラッチに使用される磁性粉末は、励
磁電流のＯＮ 、ＯＦＦに際して速やかに凝集固着と解
離離散することが必要であり、したがって、■良好な流
動特性を有すること、 および■耐久寿命の観点から高
度な耐摩耗特性と耐蝕特性とを有することが要求されさ
る。Furthermore, the magnetic powder used in magnetic powder electromagnetic clutches needs to quickly aggregate, stick, and dissociate when the exciting current is turned on and off. From this point of view, it is required to have high wear resistance and corrosion resistance.
磁粉式電磁クラッチ用磁性粉末には上記の如く種々の特
性が要求されるが、非晶質磁性合金は、前記する如くで
、その磁気特性が良好である−１−に、硬度が高く耐摩
耗性や耐蝕特性が良好である。Magnetic powder for magnetic powder type electromagnetic clutches is required to have various properties as mentioned above, but amorphous magnetic alloys have good magnetic properties as mentioned above, as well as high hardness and wear resistance. It has good durability and corrosion resistance.
本発明では、磁粉式電磁クラッチ用磁性粉末として、硬
度Ｈｖ ７００以上の非晶質磁性合金を使用し、これを
長径１０〜１５０μｍ、アスペクト比６以下で且つ角部
のないラウンドな外周面を有する板状または接床状粉末
として使用する。In the present invention, an amorphous magnetic alloy with a hardness of Hv 700 or more is used as the magnetic powder for a magnetic powder type electromagnetic clutch, and has a long diameter of 10 to 150 μm, an aspect ratio of 6 or less, and a round outer peripheral surface with no corners. Use as a plate or ground powder.
非晶質磁性合金粉末の硬度がＨｖ ７００未満である場
合には、粉末の耐摩耗特性が充分でなく磁粉式電磁クラ
ッチ用磁性粉末として充分な耐久性が得られない。また
、本発明において、非晶質合金粉末の形状および粒径は
粉末の流動性に影響するので特性上重要である。非晶質
合金粉末粒子の長径が１０μｍ未満である場合あるいは
１５０μｍを超える場合には粉末の流動特性が悪くなり
、トルク切れが悪くなり所望の特性が得られなくなるの
で、本発明では非晶質合金粉末の長径を１０μｍ１〜１
５０μｍの範囲とする。また、非晶質合金粉末の形状が
鱗ノ４状あるいは板状である場合、そのアスペク１〜比
か過度に大きいときにも粉末の流動特性が悪くなる。し
たがって、本発明では粉末形状のアスペク１〜比を８以
下、好ましくは６以下とする。When the hardness of the amorphous magnetic alloy powder is less than Hv 700, the wear resistance of the powder is insufficient and sufficient durability cannot be obtained as a magnetic powder for a magnetic powder electromagnetic clutch. Further, in the present invention, the shape and particle size of the amorphous alloy powder are important in terms of properties because they affect the fluidity of the powder. If the major axis of the amorphous alloy powder particles is less than 10 μm or more than 150 μm, the flow characteristics of the powder will deteriorate, the torque will be difficult to cut, and the desired characteristics will not be obtained. The long axis of the powder is 10μm1~1
The range is 50 μm. Further, when the shape of the amorphous alloy powder is scale-like or plate-like, the flow characteristics of the powder are also deteriorated when the aspect ratio is excessively large. Therefore, in the present invention, the aspect ratio of the powder form is set to 8 or less, preferably 6 or less.
更に、本発明の磁粉式電磁クラッチ用非晶質磁性合金粉
末は外周に鋭い角部を有さないように処理され、丸みを
もったラウンドな外表面とされている。したがって、粉
末粒子の流動性が改善され、磁粉式電磁クラッチ用磁性
粉末として要求される前記の諸特性を兼備するものとさ
れている。Further, the amorphous magnetic alloy powder for a magnetic powder type electromagnetic clutch of the present invention is treated so as not to have sharp corners on the outer periphery, and has a rounded outer surface. Therefore, the fluidity of the powder particles is improved, and the powder particles are said to have the above-mentioned characteristics required as a magnetic powder for a magnetic powder type electromagnetic clutch.
本発明の磁粉式電磁クラッチ用磁性粉末は、例えば次の
手段により製造される。The magnetic powder for a magnetic powder type electromagnetic clutch of the present invention is manufactured, for example, by the following method.
非晶質合金は、溶融金属を急冷凝固させて得られもので
あるが、溶融金属から直接本発明の要件を兼備する非晶
質合金粉末を得ることはできない。Although an amorphous alloy is obtained by rapidly cooling and solidifying a molten metal, it is not possible to directly obtain an amorphous alloy powder that satisfies the requirements of the present invention from the molten metal.
本発明の非晶質磁性合金粉末は、単ロール法、キャビテ
ーション法、あるいは水アトマイズ法等の従来公知の方
法によりリボン状、鱗片状あるいは粒状の非晶質合金を
得て後、必要により破砕処理を施し素材粉末を得る工程
、ついで素材粉末を回転ミル装置、振動ミル装置、ジェ
ットミル装置あるいは乳鉢等を用いて粉末同士を衝突摩
耗させる摩砕処理により素材粉末外周面の角部を摩滅さ
せ外周面をラウンド状にした後、所望の粒径の粉末を分
級収容する工程により得られる。The amorphous magnetic alloy powder of the present invention is obtained by obtaining a ribbon-shaped, scale-shaped or granular amorphous alloy by a conventionally known method such as a single roll method, cavitation method, or water atomization method, and then subjected to crushing treatment if necessary. The raw material powder is then subjected to a grinding process in which the powders collide with each other using a rotary mill, a vibration mill, a jet mill, a mortar, etc. to abrade the corners of the outer peripheral surface of the raw material powder. After making the surface into a round shape, it is obtained by a step of classifying and storing powder with a desired particle size.
ここで、本発明で採用される非晶質合金粉末の組成とし
ては、
Ｃｏ７５Ｆｅ５Ｓ」４Ｉ３□５
Ｃ０ＧＩＩ ＋Ｂ Ｆ ｅ４ ＋２Ｓ １１５ Ｂ 、
ｚＣＯ，，３Ｆｅ４．７Ｓ］□ＳＢ□。Here, the composition of the amorphous alloy powder employed in the present invention is: Co75Fe5S'4I3□5 C0GII +B Fe4 +2S 115 B
zCO,,3Fe4.7S]□SB□.
ＣＯ□Ｉ］Ｓｉ、。Ｂ工。CO□I]Si,. B engineering.
Ｃｏｒ、６Ｆｅ、Ｃｒ、５ｊ５Ｂ、５
Ｃ０６６、ｅ Ｆ ｅ４＋ ！、 Ｎ ］］１ Ｎ ｂ
２ Ｈ２Ｓ １１ Ｄ Ｂ １５Ｃｏ９．Ｚｒ１ｏ（数
字は原子％を示す。以下、同じ）等に代表されるＣＯ基
非晶質合金、あるいはＦ ｅ７ｓ Ｓ ｉ□ｏ Ｂ 、
５
Ｆ ｅ、２Ｃｏ８Ｓ ｉ、Ｂ □５
Ｆｅ７ｒ、Ｃｒ６Ｓｊ４Ｂ１４
Ｆｅ□５Ｃｒ６Ｎｂ１Ｓｉ、、Ｂ、４
Ｆ Ｑ ７６ Ｍ Ｏ６Ｓ ］、４ Ｂ ｉ４Ｆ ｅ７
Ｂ Ｓ Ｉｇ Ｂ Ｈ−３
Ｆ ｅ７ Ｂ Ｓ １１ 。Ｂ １２
Ｆ ｅ７ ｇ ８１５８ □Ｂ
Ｆｅ８□５ｊ４Ｂ１３Ｃ２
Ｆｅ４ｏＮｊ４ｏＰ□６Ｂ６
Ｆ ｅ＋； ２ Ｎ ｉｓ、 ６ Ｓ １ＢＢ １．４
Ｆｅ、。Ｚｅ、。Cor, 6Fe, Cr, 5j5B, 5 C066, e Fe4+! , N ]]1 N b
2 H2S 11 D B 15Co9. CO-based amorphous alloys such as Zr1o (numbers indicate atomic %; the same applies hereinafter), or Fe7s Si□o B,
5 Fe, 2Co8S i, B □5 Fe7r, Cr6Sj4B14 Fe□5Cr6Nb1Si,, B, 4 F Q 76 M O6S ], 4 B i4F e7
B S Ig B H-3 Fe7 B S 11 . B 12 Fe7 g 8158 □B Fe8□5j4B13C2 Fe4oNj4oP□6B6 Fe+; 2 N is, 6 S 1BB 1.4
Fe,. Ze,.
等に代表されるＦｅ基非晶質合金等の磁性合金を使用す
ることができる。Magnetic alloys such as Fe-based amorphous alloys such as Fe-based amorphous alloys can be used.
なお、磁粉式電磁クラッチあるいはブレーキは、その使
用目的により高トルク用と低トルク用とがある。低トル
ク用の場合には磁性粉末に高磁束密度が要求されないの
で高透磁率で低鉄損の特性の良好なＣＯ基非晶質合金粉
末を採用が好適であり、高トルク用の場合には飽和磁束
密度の高いＦｅ基非晶質合金粉末の採用が望ましい。Note that magnetic particle type electromagnetic clutches or brakes are classified into high-torque and low-torque types depending on the purpose of use. For low torque applications, high magnetic flux density is not required for the magnetic powder, so it is preferable to use CO-based amorphous alloy powder, which has good characteristics of high magnetic permeability and low core loss. It is desirable to use Fe-based amorphous alloy powder with high saturation magnetic flux density.
実施例−１
Ｃｏ ７５（原子）％、 Ｆｅ ５（原子）％、５ｉ
４（原子）％。Example-1 Co 75 (atomic)%, Fe 5 (atomic)%, 5i
4 (atomic)%.
Ｂ１６（原子）％を組成とする鱗片状の非晶質合金を従
来公知のキャビテーション法により製造し、これをジェ
ットミル装置により摩砕して長径２０〜４４μｍ、アス
ペクト比５以下で、表面の角部が摩滅されてラウンド形
状にされた板状の非晶質合金粉末とした。得られた非晶
質合金粉末の粒子構造を第１図に電子顕微鏡写真（Ｘ５
００）で示す。また、非晶質合金粉末の特性は次の通り
であった。A scaly amorphous alloy having a composition of 16 (atomic)% B is produced by a conventionally known cavitation method, and is ground by a jet mill to have a major diameter of 20 to 44 μm, an aspect ratio of 5 or less, and a surface corner. The plate-shaped amorphous alloy powder was made into a round shape by being worn away. The particle structure of the obtained amorphous alloy powder is shown in Fig. 1 as an electron micrograph (X5
00). Further, the characteristics of the amorphous alloy powder were as follows.
（１）磁気的特性
非晶質合金粉末試料０．２８３］１ ｇｒを試料とし試
料振動型磁力計により最大測定磁場］０ＫＯｅで、直流
磁化特性を測定した。得られた特性曲線を第２図に示す
。この非晶質合金粉末は、飽和磁束密度１．］５Ｔ、保
磁力４Ａ／ｍ以下の値を示した。(1) Magnetic properties Using an amorphous alloy powder sample of 0.283] 1 gr as a sample, the direct current magnetization properties were measured using a sample vibrating magnetometer at a maximum measurable magnetic field of 0 KOe. The obtained characteristic curve is shown in FIG. This amorphous alloy powder has a saturation magnetic flux density of 1. ]5T, the coercive force was 4A/m or less.
また、同じ試料について、周波数６０Ｈｚ、測定磁場７
５０ｅでの交流磁化特性（磁気履歴特性）を測定したと
ころ保磁力４ Ａ／ｍ を示した。In addition, for the same sample, the frequency was 60 Hz, and the measurement magnetic field was 7
Measurement of AC magnetization characteristics (magnetic history characteristics) at 50e showed a coercive force of 4 A/m.
得られた特性曲線を第３図（ａ）に示す。The obtained characteristic curve is shown in FIG. 3(a).
また、比較のために従来電磁クラッチに使用されている
粒径２０〜４４μｍの鉄粉について、上記と同様な交流
磁化特性を測定したところ、その保磁力は３８２ Ａ／
ｍを示した。得られた磁気履歴特性曲線を第３図（ｂ）
に示す。 第３図（ａ）および（ｂ）より明らかな如く
、本発明の非晶質合金粉末の磁束密度Ｂと外部磁界Ｉ−
Ｉとの比（Ｂ ／ Ｈ）は、比較鉄粉のそれに較べて大
きく、したがって、小さい励磁電流で高い磁束密度を得
ることができる。In addition, for comparison, we measured the AC magnetization characteristics of iron powder with a particle size of 20 to 44 μm, which is conventionally used in electromagnetic clutches, and found that its coercive force was 382 A/
m was shown. The obtained magnetic hysteresis characteristic curve is shown in Figure 3(b).
Shown below. As is clear from FIGS. 3(a) and (b), the magnetic flux density B of the amorphous alloy powder of the present invention and the external magnetic field I-
The ratio (B/H) to I is larger than that of the comparative iron powder, and therefore a high magnetic flux density can be obtained with a small excitation current.
なお、本実施例のＣｏ基非晶質磁性合金の磁歪係数は、
はとんどゼロであった。The magnetostriction coefficient of the Co-based amorphous magnetic alloy of this example is:
was almost zero.
（２）流動特性
前記非晶質合金粉末の流動特性は、第１表に示すとおり
であり満足できる流動特性を示していた。(2) Flow characteristics The flow characteristics of the amorphous alloy powder are as shown in Table 1, and showed satisfactory flow characteristics.
第１表
なお、流動塵試験はＪＩＳ ２５０２に従っておこなっ
た。Table 1 Note that the fluid dust test was conducted in accordance with JIS 2502.
（３）硬 度
前記の非晶質合金粉末の硬度はＨｖ８００〜９００であ
り、従来の電磁クラッチ用鉄粉の硬度（約Ｈｖ１００）
に比較して格段に硬質なものであった。(3) Hardness The hardness of the amorphous alloy powder described above is Hv800 to Hv900, and the hardness of conventional iron powder for electromagnetic clutches (approximately Hv100)
It was much harder than that.
（４）その他の特性
前記の非晶質合金粉末は、非晶質であり特にＣｏ系の合
金であるためにその耐蝕特性は従来の鉄粉のそれに較べ
て格段に優れている。 また、この種の非晶質合金はゼ
ロ磁歪を示す合金である。(4) Other properties The above-mentioned amorphous alloy powder is amorphous and is particularly a Co-based alloy, so its corrosion resistance is much superior to that of conventional iron powder. Further, this type of amorphous alloy is an alloy that exhibits zero magnetostriction.
以上の如くで、前記の非晶質合金粉末は、従来磁粉式電
磁クラッチに使用されている鉄粉に比較して保磁力が極
めて小さく、また、第３図（ａ）より明らかな如く、そ
の磁気履歴曲線は殆どループを描かず直線状をなし、且
つＢ／Ｈが大きい。As described above, the amorphous alloy powder has an extremely small coercive force compared to the iron powder conventionally used in magnetic powder electromagnetic clutches, and as is clear from FIG. 3(a), The magnetic hysteresis curve is linear with almost no loops, and B/H is large.
したがって、この非晶質合金粉末を磁粉式電磁クラッチ
の磁性粉末として使用する場合、励磁電流の通電を停止
したときには残留磁気を有さずに充分な消磁状態になり
解離分散が速やかになされるとともに発熱によるエネル
ギー損失も少なく、動力伝達制御の応答特性を改善する
ことができる。Therefore, when this amorphous alloy powder is used as the magnetic powder for a magnetic powder type electromagnetic clutch, when the excitation current is stopped, it is in a sufficiently demagnetized state without residual magnetism, and dissociation and dispersion is quickly performed. There is also less energy loss due to heat generation, and the response characteristics of power transmission control can be improved.
また、この非晶質合金粉末は従来使用の鉄粉に比較して
その硬度が硬いので、粉体同志の衝突による破損がなく
、且つ磁歪が小さいので粉体同志の応力による磁気的特
性の劣化を招くことがないとともに優れた耐摩耗特性を
示すので、粉体式電磁クラッチ用磁性粉末として使用す
る場合、その良好な動力伝達制御特性が長期に亘り維持
される。In addition, this amorphous alloy powder has a harder hardness than conventionally used iron powder, so there is no damage due to collisions between powder particles, and the magnetostriction is small, so there is no deterioration of magnetic properties due to stress between powder particles. Since it does not cause any damage and exhibits excellent wear resistance properties, when used as a magnetic powder for a powder type electromagnetic clutch, its good power transmission control properties are maintained over a long period of time.
実施例−２
Ｆｅ７２（原子）％、 Ｃｏ ８（原子）％、 Ｓｊ
５（原子）％。Example-2 Fe72 (atomic)%, Co8 (atomic)%, Sj
5 (atomic)%.
Ｂ１５（原子）％を組成とする非晶質合金の薄板（リボ
ン）を従来の単ロール法により製作し、これを粉砕して
後、ボールミル法により外周の角部を摩滅させて外周が
ラウンド形状をした長径４４〜７４μｍでアスペクト比
６以下の非晶質合金粉末を得た。A thin plate (ribbon) of an amorphous alloy with a composition of 15 (atomic) % B is manufactured using the conventional single roll method, and after this is crushed, the corners of the outer periphery are worn away using a ball mill method to create a rounded outer periphery. An amorphous alloy powder having a major axis of 44 to 74 μm and an aspect ratio of 6 or less was obtained.
得られた非晶質合金粉末は保磁力が１６Ａ／ｍと小さく
、また、残留磁束密度も従来の鉄分に比較して格段に小
さい値を示した。The obtained amorphous alloy powder had a small coercive force of 16 A/m, and the residual magnetic flux density also showed a value much smaller than that of conventional iron.
また、硬度Ｈｖ ８００〜９００、流動塵２０ ｓｅｃ
で良好な耐摩耗特性と良好な流動特性を有し、磁粉式電
磁クラッチ用磁性粉末に使用することによりこの種の電
磁クラッチの動力伝達制御の応答特性の改善するもので
ある。In addition, hardness Hv 800-900, fluid dust 20 sec
It has good wear resistance properties and good flow properties, and when used in magnetic powder for magnetic powder type electromagnetic clutches, it improves the response characteristics of power transmission control of this type of electromagnetic clutches.
以上の通りで、本発明の磁性粉末は、磁粉式電磁クラッ
チあるいはブレーキ用の磁性粉末に要求される磁気特性
、流動性、硬度および耐摩耗性、耐蝕特性等の諸特性を
兼備するものであり、電磁クラッチの制御特性および耐
久性を改善するものである。As described above, the magnetic powder of the present invention has various properties such as magnetic properties, fluidity, hardness, wear resistance, and corrosion resistance required for magnetic powder for magnetic particle electromagnetic clutches or brakes. , which improves the control characteristics and durability of the electromagnetic clutch.
第１図は、本発明の実施例である磁粉式電磁クラッチま
たはブレーキ用非晶質合金粉末の粒子構造を示す電子顕
微鏡写真（Ｘ５００）、第２図は、本発明の非晶質合金
粉末の１実施例についての直流磁化特性曲線、第３図（
ａ）は交流での磁気履歴特性曲線、第３図（ｂ）は従来
の鉄粉の交流での磁気履歴特性曲線を示す図である。Figure 1 is an electron micrograph (X500) showing the particle structure of an amorphous alloy powder for a magnetic particle type electromagnetic clutch or brake which is an example of the present invention, and Figure 2 is an electron micrograph (X500) showing the particle structure of an amorphous alloy powder of the present invention. DC magnetization characteristic curve for one example, Fig. 3 (
FIG. 3(a) is a diagram showing a magnetic hysteresis characteristic curve in alternating current, and FIG. 3(b) is a diagram showing a magnetic hysteresis characteristic curve in alternating current of a conventional iron powder.
Claims (1)
磁性金属粉末であって、該磁性金属粉末が、硬度Ｈｖ７
００以上の非晶質合金粉末でなり、且つ該非晶質合金粉
末が長径１０〜１５０μｍ、アスペクト比６以下であり
外周に角部を有さない板状または擬球状の電磁クラッチ
またはブレーキ用磁性粉末。 ２）非晶質の軟質磁性合金でなる素材粉末を製造する第
１工程、前記素材粉末を摩砕容器に収容して摩砕処理し
た後に分級する第２工程とを有することを特徴とする、
磁粉式電磁クラッチまたはブレーキに使用される軟磁性
金属粉末であって、該磁性金属粉末が、硬度Ｈｖ７００
以上の非晶質合金粉末でなり、且つ該非晶質合金粉末が
長径１０〜１５０μｍ、アスペクト比６以下であり外周
に角部を有さない板状または擬球状の電磁クラッチまた
はブレーキ用磁性粉末の製造方法。[Claims] 1) A soft magnetic metal powder used in a magnetic particle type electromagnetic clutch or brake, the magnetic metal powder having a hardness of Hv7.
00 or more, the amorphous alloy powder has a major axis of 10 to 150 μm, an aspect ratio of 6 or less, and has a plate-like or pseudo-spherical shape with no corners on the outer periphery for use in electromagnetic clutches or brakes. . 2) It is characterized by having a first step of producing a raw material powder made of an amorphous soft magnetic alloy, and a second step of storing the raw material powder in a grinding container, grinding it, and then classifying it.
A soft magnetic metal powder used in a magnetic particle type electromagnetic clutch or brake, the magnetic metal powder having a hardness of Hv700.
Magnetic powder for electromagnetic clutches or brakes is made of the above amorphous alloy powder, and the amorphous alloy powder has a major axis of 10 to 150 μm, an aspect ratio of 6 or less, and has a plate-like or pseudo-spherical shape without corners on the outer periphery. Production method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60221975A JPS6283401A (en) | 1985-10-07 | 1985-10-07 | Magnetic powder for electromagnetic clutch and brake and its production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60221975A JPS6283401A (en) | 1985-10-07 | 1985-10-07 | Magnetic powder for electromagnetic clutch and brake and its production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6283401A true JPS6283401A (en) | 1987-04-16 |
Family
ID=16775100
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60221975A Pending JPS6283401A (en) | 1985-10-07 | 1985-10-07 | Magnetic powder for electromagnetic clutch and brake and its production |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6283401A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100701413B1 (en) | 2005-05-31 | 2007-03-30 | 한국과학기술연구원 | Amorphous powder flakes and preparation method thereof |
| JP2007324270A (en) * | 2006-05-31 | 2007-12-13 | Toyota Motor Corp | Magnetic powder manufacturing method and powder core manufacturing method |
| KR100904664B1 (en) | 2008-06-03 | 2009-06-25 | 주식회사 에이엠오 | Magnetic core for current sensor |
| EP1839779A4 (en) * | 2004-12-06 | 2009-12-30 | Sunrex Kogyo Co Ltd | Process for producing metal product and metal product |
| JP4767368B1 (en) * | 2011-04-26 | 2011-09-07 | 昌義 安久津 | Towing cultivator for cultivators |
| JP2013033980A (en) * | 2012-09-20 | 2013-02-14 | Seiko Epson Corp | Metal powder for magnetic fluid |
| WO2018113555A1 (en) * | 2016-12-21 | 2018-06-28 | 三环瓦克华（北京）磁性器件有限公司 | Micro powder for preparing neodymium-iron-boron permanent magnet material, method for preparing powder by target-type jet milling, and powder |
| JP2018195691A (en) * | 2017-05-17 | 2018-12-06 | パナソニックＩｐマネジメント株式会社 | Powder magnetic core and mixed soft magnetic powder |
| CN113053610A (en) * | 2019-12-27 | 2021-06-29 | Tdk株式会社 | Soft magnetic alloy powder, magnetic core, magnetic component, and electronic device |
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-
1985
- 1985-10-07 JP JP60221975A patent/JPS6283401A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1839779A4 (en) * | 2004-12-06 | 2009-12-30 | Sunrex Kogyo Co Ltd | Process for producing metal product and metal product |
| KR100701413B1 (en) | 2005-05-31 | 2007-03-30 | 한국과학기술연구원 | Amorphous powder flakes and preparation method thereof |
| JP2007324270A (en) * | 2006-05-31 | 2007-12-13 | Toyota Motor Corp | Magnetic powder manufacturing method and powder core manufacturing method |
| KR100904664B1 (en) | 2008-06-03 | 2009-06-25 | 주식회사 에이엠오 | Magnetic core for current sensor |
| JP4767368B1 (en) * | 2011-04-26 | 2011-09-07 | 昌義 安久津 | Towing cultivator for cultivators |
| JP2013033980A (en) * | 2012-09-20 | 2013-02-14 | Seiko Epson Corp | Metal powder for magnetic fluid |
| WO2018113555A1 (en) * | 2016-12-21 | 2018-06-28 | 三环瓦克华（北京）磁性器件有限公司 | Micro powder for preparing neodymium-iron-boron permanent magnet material, method for preparing powder by target-type jet milling, and powder |
| JP2018195691A (en) * | 2017-05-17 | 2018-12-06 | パナソニックＩｐマネジメント株式会社 | Powder magnetic core and mixed soft magnetic powder |
| CN113053610A (en) * | 2019-12-27 | 2021-06-29 | Tdk株式会社 | Soft magnetic alloy powder, magnetic core, magnetic component, and electronic device |
| US20210230720A1 (en) * | 2019-12-27 | 2021-07-29 | Tdk Corporation | Soft magnetic alloy powder, magnetic core, magnetic component and electronic device |
| CN113053610B (en) * | 2019-12-27 | 2025-01-03 | Tdk株式会社 | Soft magnetic alloy powders, magnetic cores, magnetic components and electronic devices |
| US12618125B2 (en) * | 2019-12-27 | 2026-05-05 | Tdk Corporation | Soft magnetic alloy powder, magnetic core, magnetic component and electronic device |
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