JPS63146413A - Permanent magnet - Google Patents
Permanent magnetInfo
- Publication number
- JPS63146413A JPS63146413A JP62077457A JP7745787A JPS63146413A JP S63146413 A JPS63146413 A JP S63146413A JP 62077457 A JP62077457 A JP 62077457A JP 7745787 A JP7745787 A JP 7745787A JP S63146413 A JPS63146413 A JP S63146413A
- Authority
- JP
- Japan
- Prior art keywords
- atomic
- magnet
- coercive force
- heat treatment
- treatment time
- 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
- 229910052796 boron Inorganic materials 0.000 claims abstract description 6
- 229910052759 nickel Inorganic materials 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 11
- 230000005415 magnetization Effects 0.000 abstract description 8
- 238000004904 shortening Methods 0.000 abstract description 3
- 229920006395 saturated elastomer Polymers 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 description 19
- 229910045601 alloy Inorganic materials 0.000 description 14
- 239000000956 alloy Substances 0.000 description 14
- 239000000203 mixture Substances 0.000 description 4
- 238000005096 rolling process Methods 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- 239000013590 bulk material Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910001004 magnetic alloy Inorganic materials 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910000510 noble metal Inorganic materials 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
Abstract
Description
【発明の詳細な説明】 ［発明の目的］ （産業上の利用分野） 本発明は永久磁石に関する。[Detailed description of the invention] [Purpose of the invention] (Industrial application field) The present invention relates to permanent magnets.
（従来の技術）
近年、新しい永久磁石材料が種々開発されつつある。そ
の中の１つに、Ｆｅ−Ｐｔ系磁石が知られている＠（Ｔ
ｒａｎｓ、ｏｆ Ｊａｐａｎ Ｉｎ５ｔ、ｏｆ Ｍｅｔ
ａｌｓ度１０．ｌ１ｋＧ、最大エネルギー積２０ＭＧＯ
ｅの磁石特性を持ち、貴金属元素を含む磁石材料しては
最高に優れたものである。(Prior Art) In recent years, various new permanent magnet materials are being developed. One of them is the Fe-Pt magnet.
rans, of Japan In5t, of Met
als degree 10. l1kG, maximum energy product 20MGO
It has the magnetic properties of E, and is the best among magnetic materials containing noble metal elements.
しかし、上記磁石特性を得るためには１０００℃近傍で
溶体化後、５００℃近傍で熱処理を必要とするが、その
熱処理時間が１００時間と非常に長時間を必要とする欠
点があった。However, in order to obtain the above-mentioned magnetic properties, it is necessary to heat the magnet at around 500° C. after solution treatment at around 1000° C., which has the drawback of requiring a very long heat treatment time of 100 hours.
（発明が解決しようとする問題点）
本発明は、上記欠点を解決し、熱処理時間を大巾に短縮
し、併せて磁石特性を向上させることを目的とする。(Problems to be Solved by the Invention) The present invention aims to solve the above-mentioned drawbacks, significantly shorten the heat treatment time, and improve the magnetic properties.
Ｃ発明の構成］
（問題点を解決するための手段）
本発明者らはＦｅ−Ｐｔ磁石の５００℃近傍での熱処理
時間の短縮をはかるべく種々の実験を行った結果、Ｂ（
ボロン）の添加が極めて有効であることを見出した。す
なわち、Ｂの添加により、上記熱処理時間を約１／１０
に短縮できることを見出した。また、Ｂ添加で、その添
加量によっては保磁力が向上するなど、磁石特性の改善
もはかられることを見出した。C Configuration of the Invention] (Means for Solving the Problems) The present inventors conducted various experiments in an attempt to shorten the heat treatment time of Fe-Pt magnets at around 500°C, and as a result, B(
It has been found that the addition of boron) is extremely effective. That is, by adding B, the above heat treatment time is reduced by about 1/10.
We found that it can be shortened to It has also been found that the addition of B can improve magnetic properties, such as increasing coercive force, depending on the amount added.
本発明の磁石合金は次の組成から成る。すなわち、原子
％表示で、Ｐｔ−３０〜６０％、Ｂ−２〜３０％、残部
がＦｅと不可避的に混入する不純物より成る。またＮｉ
あるいはＣＯの添加によって保磁力が向上するなど、磁
石特性の改善もはかられることを見出した。一般式で表
わすと（Ｆｅ Ｐｔ Ｍ ）
Ｌ−ａ−ｂ ａ ｂ １００−ｃ ＢｅＭ−Ｎ
ｉ、Ｃｏより選ばれる少なくとも１種
０．３０≦ａ≦０．ＢＯ
Ｑ＜ｂ≦０．３０
２ ≦ Ｃ≦ ３０ （ａｔ ％）で表わ
される。The magnetic alloy of the present invention has the following composition. That is, in terms of atomic percent, Pt-30 to 60%, B-2 to 30%, and the balance consists of Fe and impurities that are inevitably mixed. Also Ni
It has also been found that the addition of CO can improve magnetic properties, such as increasing coercive force. Represented by the general formula: (Fe Pt M ) L-a-b a b 100-c BeM-N
at least one selected from i, Co, 0.30≦a≦0. BO Q<b≦0.30 2≦C≦30 (at %).
（作 用）
以下、上記組成の限定した理由について述べる。ｐｔは
３０原子％未満および６０原子％を越える場合には、高
保磁力が得られず、高性能磁石とならない。Ｂは２原子
％未満では、熱処理時間短縮効果が得られず、また３０
原子％をこえると飽和磁化が著しく低下し、優れた磁石
特性が得られない。(Function) The reason for the above composition limitation will be described below. If pt is less than 30 atomic % or more than 60 atomic %, a high coercive force cannot be obtained and a high-performance magnet cannot be obtained. If B is less than 2 at%, the effect of shortening the heat treatment time cannot be obtained;
If it exceeds atomic %, the saturation magnetization will drop significantly and excellent magnetic properties will not be obtained.
またＭ成分を含むときの限定理由を述べる。In addition, the reason for the limitation when the M component is included will be described.
ｐｔはａで表わすと０．３未満および０．６を越える場
合には、高保磁力が得られず、高性能磁石とはならない
。Ｍは特に磁石特性を改善する効果をもたらすが、ｂの
値で０．３を越えると、Ｎ【の場合は飽和磁化が著しく
低下しまたＣＯの場合高保磁力が得られなくなる。If pt, expressed as a, is less than 0.3 or more than 0.6, a high coercive force cannot be obtained and a high-performance magnet cannot be obtained. M particularly has the effect of improving magnetic properties, but if the value of b exceeds 0.3, the saturation magnetization will drop significantly in the case of N, and high coercive force will not be obtained in the case of CO.
Ｂは２原子％未満では、熱処理時間短縮効果が得られず
、また３０原子％を越えると飽和磁化が著しく低下し、
優れた磁石特性が得られない。If B is less than 2 atomic %, the effect of shortening the heat treatment time cannot be obtained, and if it exceeds 30 atomic %, the saturation magnetization will be significantly reduced.
Excellent magnetic properties cannot be obtained.
（実施例） 以下、実施例にて本発明を詳細に述べる。(Example) Hereinafter, the present invention will be described in detail with reference to Examples.
実施例ｌ
Ｐｔ−３３原子％、Ｂ−１７原子％、残部Ｆｅより成る
合金を高周波誘導加熱炉を用いて溶解し、作製した。本
合金を非晶質合金作製用に用いられる単ロール法第１図
を用いて急冷リボンを作製した。用いたロールは直径３
０ Ｇ ＋ａｍの銅製で、ロール回転数は１０００ ｒ
ｐｍであった。また、急冷リボン作製時の合金溶融温度
は１２００℃、ガス圧０．７ｋｇ／ｃｄであった。得ら
れたリボンを長さ約５關に切り、５００℃で各種時間熱
処理した。Example 1 An alloy consisting of 33 at. % of Pt, 17 at. % of B, and the balance of Fe was melted using a high frequency induction heating furnace to produce an alloy. A quenched ribbon of this alloy was prepared using the single roll method shown in FIG. 1, which is used for preparing amorphous alloys. The roll used had a diameter of 3
Made of copper with 0 G + am, roll rotation speed is 1000 r
It was pm. Moreover, the alloy melting temperature at the time of producing the quenched ribbon was 1200° C. and the gas pressure was 0.7 kg/cd. The obtained ribbon was cut into approximately 5 lengths and heat treated at 500° C. for various times.
その後、三れら試料の磁気特性を試料振動型磁力計（Ｖ
ＳＭ）を用いて測定した。その結果得られた保磁力の熱
処理時間依存性を第２図に示す。この（図２）から保磁
力の最大は、熱処理時間１０・ 時間で得られ、最大値
は４．８ｋ Ｏｅであることがわかる。これはＢを添加
しない場合に最大保磁力が得られる熱処理時間１００時
間の１７１０であり、そかもその場合の最大保磁力４．
３ｋ Ｏｅよりも大きく、Ｂ添加効果の著しいことがわ
かる。また、同組成につき双ロール法によって得られた
急冷リボンにおいても同様の効果が確められた。After that, the magnetic properties of the three samples were measured using a sample vibrating magnetometer (V
SM). The dependence of the coercive force on the heat treatment time obtained as a result is shown in FIG. From this (FIG. 2), it can be seen that the maximum coercive force was obtained at a heat treatment time of 10 hours, and the maximum value was 4.8 kOe. This is 1710, which is the heat treatment time of 100 hours at which the maximum coercive force can be obtained when B is not added, and the maximum coercive force in that case is 4.
It is clear that the effect of B addition is significant. Furthermore, similar effects were confirmed in a rapidly cooled ribbon of the same composition obtained by the twin roll method.
実施例２
実施例１と同様の方法を用いて、
（ＦｅＯ，６Ｐ ｔＯ，４） Ｉ Ｑ ０−ｘＢｘ （
原子％表示）合金を作製、５００℃の熱処理を行い、最
大保磁力（いずれも４．５ｋ Ｏｅ以上であった）の得
られた時の熱処理時間と飽和磁化のＢｆｆｉとの関係を
第３図に示した。これより、本発明の合金はいずれも従
来のＢを含まない熱処理時間１００時間よりも大巾に短
縮されていることがわかる。一方、飽和磁化は３０原子
％を越えると６ｋＧ以下と小さくなる。Example 2 Using a method similar to Example 1, (FeO,6P tO,4) I Q 0-xBx (
Fig. 3 shows the relationship between the heat treatment time and the saturation magnetization Bffi when the maximum coercive force (all of them were 4.5 k Oe or more) was obtained. It was shown to. From this, it can be seen that the heat treatment time for all of the alloys of the present invention is significantly shorter than the conventional heat treatment time of 100 hours that does not contain B. On the other hand, when the saturation magnetization exceeds 30 atomic %, the saturation magnetization decreases to 6 kG or less.
（ＦｅＯ，５Ｐ ｔｏ、４ Ｎ ｉＯ，ｌ ） ８３Ｂ
１７で表わされる合金を高周波誘導加熱炉を用いて溶解
し、作製した。本合金を非晶質合金作製用に用いられる
単ロール法第１図を用いて急冷リボンを作製した。(FeO,5P to,4N iO,l ) 83B
An alloy represented by No. 17 was melted using a high frequency induction heating furnace to produce the alloy. A quenched ribbon of this alloy was prepared using the single roll method shown in FIG. 1, which is used for preparing amorphous alloys.
用いたロールは直径３００ ｍｍの銅製で、ロール回転
数は１０００ ｒｐｍであった。また、急冷リボン作製
時の合金溶融温度は１２００℃、ガス圧０．７）ｃｇ
／ ｃ−あった。得られたリボンを長さ約５ ｍｍに切
り、５００℃で各種時間熱処理した。その後、これら試
料の磁気特性を５料振動型磁力計（Ｖ Ｓ Ｍ）を用い
て測定した。その結果得られた保磁力の熱処理時間依存
性を第４図に示す。この（図２）から保磁力の最大は、
熱処理時間１時間で得られ、最大値は５．８ｋ Ｏｅで
あることがわかる。これは、Ｂを添加しない場合に最大
保磁力が得られる熱処理時間１００時間の１／１００で
あり、しかもその場合の最大保磁力４．３ｋ Ｏｅより
も大きく、ＢとＮｉ添加効果の著しいことがわかる。ま
た、同組成につき双ロール法によって得られた急冷リボ
ンにおいても同様の効果が確められた。The roll used was made of copper and had a diameter of 300 mm, and the roll rotation speed was 1000 rpm. In addition, the alloy melting temperature during rapid cooling ribbon production was 1200°C, and the gas pressure was 0.7)cg.
/c-There was. The resulting ribbons were cut into lengths of about 5 mm and heat treated at 500°C for various times. Thereafter, the magnetic properties of these samples were measured using a five-material vibrating magnetometer (VSM). The dependence of the coercive force on the heat treatment time obtained as a result is shown in FIG. From this (Figure 2), the maximum coercive force is
It can be seen that the maximum value was 5.8 k Oe, which was obtained with a heat treatment time of 1 hour. This is 1/100 of the heat treatment time of 100 hours to obtain the maximum coercive force when B is not added, and is also greater than the maximum coercive force of 4.3 k Oe in that case, indicating that the effect of B and Ni addition is significant. Recognize. Furthermore, similar effects were confirmed in a rapidly cooled ribbon of the same composition obtained by the twin roll method.
実施例４
（Ｆ ｅｏ、８−ｘ Ｐ ｔ Ｏ，４Ｍｘ）８４Ｂ１７
［Ｍ−Ｃｏ、Ｎｉｌ （原子％表示）の各合金を実
施例１と同様にして作製し、５００℃熱処理を行なった
。いずれも１〜５時間の熱処理時間で最大保磁力が得ら
れたが、（ｏ、Ｎｉｆｆ１に対して飽和磁化とともに第
５図にプロットする。これより、本発明の合金は保磁力
Ｎｉ、Ｃｏ添加することにより、改善されＣＯではＸ≦
０．３で有効であり、Ｎｉではｘｆｆｉによらずほぼ一
定値をとる。一方、飽和磁化は、Ｎｉ添加の場合ｘ＞０
．３では、６ＫＧ以下と小さくなってしまう。Example 4 (F eo, 8-x P t O, 4Mx) 84B17
[Alloys of M-Co and Nil (expressed in atomic %) were prepared in the same manner as in Example 1, and heat treated at 500°C. In all cases, the maximum coercive force was obtained with a heat treatment time of 1 to 5 hours. By doing so, it is improved and in CO, X≦
It is effective at 0.3, and takes a nearly constant value for Ni regardless of xffi. On the other hand, the saturation magnetization is x>0 in the case of Ni addition.
．． 3, it will be smaller than 6KG.
なお、Ｎｉ、Ｃｏの添加量の増加とともに最大保磁力が
得られる時間は長くなり、たとえばＸ−０，１では１時
間ｘ−０，３のとき５時間である。Note that as the amount of Ni and Co added increases, the time required to obtain the maximum coercive force becomes longer; for example, for X-0,1, it is 1 hour, and for x-0,3, it is 5 hours.
以上の実施例は全て急冷リボンを熱処理した場合につい
て示したが、通常の溶解合金のバルク材を熱処理した場
合にも、同様のＢ添加効果が認められた。Although all of the above examples have been shown in the case where the rapidly cooled ribbon was heat treated, the same effect of B addition was also observed when the bulk material of the ordinary molten alloy was heat treated.
［発明の効果］
以上示したように、Ｂ添加により優れた磁石特性を得る
ための熱処理時間の著しい短縮と保磁力の向上が得られ
る。[Effects of the Invention] As shown above, the addition of B can significantly shorten the heat treatment time and improve the coercive force in order to obtain excellent magnetic properties.
第１図は本発明の合金作製の１例を示す概念図。 第２図乃至第５図は本発明の効果を示す特性図である。 FIG. 1 is a conceptual diagram showing one example of alloy production according to the present invention. 2 to 5 are characteristic diagrams showing the effects of the present invention.
Claims (1)
Ｆｅより成ることを特徴とする永久磁石。 （２）Ｎｉ、Ｃｏの少なくとも一種をさらに含有するこ
とを特徴とする特許請求の範囲第１項記載の永久磁石。 （３）一般式 （Ｆｅ＿１＿−＿ａ＿−＿ｂＰｔ＿ａＭ＿ｂ）＿１＿０
＿０＿−＿ｃＢ＿ｃＭ＝Ｎｉ、Ｃｏより選ばれる少なく
とも １種 ０．３０≦ａ≦０．６０ ０＜ｂ≦０．３０ ２≦ｃ≦３０（ａｔ％） で表わされることを特徴とする特許請求の範囲第２項記
載の永久磁石。[Scope of Claims] (1) A permanent magnet characterized in that it consists of 30 to 60% Pt, 2 to 30% B, and the balance Fe in atomic %. (2) The permanent magnet according to claim 1, further containing at least one of Ni and Co. (3) General formula (Fe_1_-_a_-_bPt_aM_b)_1_0
Claims characterized in that _0_-_cB_cM=at least one selected from Ni and Co0.30≦a≦0.60 0<b≦0.30 2≦c≦30 (at%) Permanent magnet according to item 2.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15271286 | 1986-07-01 | ||
| JP61-152712 | 1986-07-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63146413A true JPS63146413A (en) | 1988-06-18 |
Family
ID=15546503
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62077457A Pending JPS63146413A (en) | 1986-07-01 | 1987-04-01 | Permanent magnet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63146413A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1239494A3 (en) * | 2001-03-02 | 2002-10-30 | Aichi Steel Corporation | Fept magnet and manufacturing method thereof |
-
1987
- 1987-04-01 JP JP62077457A patent/JPS63146413A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1239494A3 (en) * | 2001-03-02 | 2002-10-30 | Aichi Steel Corporation | Fept magnet and manufacturing method thereof |
| US6666930B2 (en) | 2001-03-02 | 2003-12-23 | Aichi Steel Corporation | FePt magnet and manufacturing method thereof |
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