JPH0248611B2 - - Google Patents
Info
- Publication number
- JPH0248611B2 JPH0248611B2 JP56039262A JP3926281A JPH0248611B2 JP H0248611 B2 JPH0248611 B2 JP H0248611B2 JP 56039262 A JP56039262 A JP 56039262A JP 3926281 A JP3926281 A JP 3926281A JP H0248611 B2 JPH0248611 B2 JP H0248611B2
- Authority
- JP
- Japan
- Prior art keywords
- alloy
- powder
- alloy powder
- sintering
- melting point
- 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
Landscapes
- Powder Metallurgy (AREA)
- Soft Magnetic Materials (AREA)
Description
＜産業上の利用分野＞
この発明は、Fe−Si系焼結合金の製造方法に
関するものである。
＜従来の技術＞
最近、粉末冶金技術の進歩はめざましく、磁性
材料の製造にも応用されつつある。
従来、１〜10％のSiを含有するFe−Si系焼結
合金の製造方法として、例えば、単一の１〜10％
のSiを含有するFe−Si系合金粉末を1300℃以下
の温度で焼結する方法が知られている。ここで、
1300℃以下の温度とする理由は、焼結設備等の工
業的制約や経済的理由によるものである。
＜発明が解決しようとする課題＞
しかし、この製造方法により得られる１〜10％
のSiを含有するFe−Si系焼結合金は、焼結密度
が不十分で、同一成分の溶製合金にくらべて著し
く直流磁気特性が低いという問題があつた。
この発明は、優れた直流磁気特性をもつ１〜10
％のSiを含有するFe−Si系焼結合金を実用的な
焼結温度領域において製造することを目的とす
る。
そして、この発明は次の点に着目して前記目的
を達成しようとするものである。
すなわち、マツクス・ハンセン編（Max
Hansen）コンスチチユシヨン・オブ・バイナリ
ー・アロイズ（Constitution of Binary
Alloys）、マツクグロウヒル・ブツクス・カムパ
ニー・インコーポレイテツド（McGraw−Hill.
Books.Co.Inc.）、1958年発行P.713記載のFe−Si2
元系合金状態図によれば、10％SiのFe−Si合金
の融点は1310℃であり、Si量が少なくなるにした
がつて融点はそれよりも高くなり、また25〜45％
SiのFe−Si合金の融点も1300℃よりも高いこと
がわかる。しかし、13〜24％Siおよび46〜72％Si
のFe−Si合金の融点は1300℃以下であることが
わかる。
したがつて1300℃以下の焼結温度で液相焼結さ
せて１〜10％のSiを含有するFe−Si系焼結合金
を高密度化するためには、前記13〜24％のSiを含
有するFe−Si系合金粉末または（および）46〜
72％のSiを含有するFe−Si系合金粉末を適量混
合させることが好適であると考えられる。
＜課題を解決するための手段＞
そのため、この発明によるFe−Si系焼結合金
の製造方法は、13〜24％のSiを含有するFe−Si
系合金粉末、46〜72％のSiを含有するFe−Si系
合金粉末またはこれらの混合物と、前記の粉末よ
りも高融点のFe−Si系合金粉末とを混合し、該
混合粉末から圧粉体を成形し、該圧粉体を前記13
〜24％のSiを含有するFe−Si系合金粉末または
46〜72％のSiを含有するFe−Si系合金粉末の融
点よりも高い温度で焼結することにより焼結後の
Si量が１〜10％となることを特徴とする。
ここで、焼結後のSi量を１〜10％としたのは、
Si量が１％未満または10％を越えると焼結合金の
磁性が低下し、磁性材料として実用的でないので
１〜10％とした。
＜実施例＞
以下、この発明の実施例を説明する。
水噴霧法により製造したFe−Si合金粉末を10
メツシユに分級して母合金粉末とした。一方、真
空誘導炉溶解によりFe−18％Si合金鋳塊をつく
り、ついで機械的粉砕を繰返して粒径が数ミクロ
ン程度の添加合金粉末を製造した。また同様な方
法によりFe−50％Siの添加合金粉末を製造した。
その後、第１表に示すように前記母合金粉末と
添加合金粉末とを混合し、これに潤滑剤としてス
テアリン酸亜鉛を１％加え、これを7tf／cm2のプ
レス圧で外径50mm、内径35mm、厚さ５mmの圧粉体
を成形した。
ついで、各圧粉体を各温度に1h保持する真空
焼結を行い、焼結密度と直流磁気特性を測定し
た。
その結果を第１表に併記した。この表に明らか
なとおり、母合金粉末に対して添加合金粉末を所
定範囲で配合し、添加合金の融点よりも高い温度
で焼結した発明合金は、基本合金（No.１）にくら
べて焼結密度、直流磁気特性とも優れていること
がわかる。また焼結後のSi％（目標値）が所定範
囲よりも過大であると、基本合金にくらべて焼結
密度は大であるが、直流磁気特性（B25値）は低
下する傾向がみられる。なお焼結後のSi％（目標
値）が所定範囲内であつても焼結温度が低い場合
は焼結密度、直流磁化特性とも同一Si％の焼結合
金のそれよりも劣つている。
<Industrial Application Field> The present invention relates to a method for producing a Fe-Si based sintered alloy. <Prior Art> Recently, powder metallurgy technology has made remarkable progress and is being applied to the production of magnetic materials. Conventionally, as a method for manufacturing Fe-Si sintered alloy containing 1 to 10% Si, for example, a single 1 to 10% Si
A method is known in which Fe-Si alloy powder containing Si is sintered at a temperature of 1300°C or lower. here,
The reason for setting the temperature to 1300° C. or lower is due to industrial constraints such as sintering equipment and economic reasons. <Problem to be solved by the invention> However, the 1 to 10% obtained by this manufacturing method
Fe-Si based sintered alloys containing Si have a problem of insufficient sintering density and significantly lower DC magnetic properties than molten alloys with the same composition. This invention has a 1 to 10
% of Si in a practical sintering temperature range. The present invention aims to achieve the above object by paying attention to the following points. That is, edited by Max Hansen (Max
Hansen) Constitution of Binary Alloys
Alloys), McGraw-Hill Books Company, Inc. (McGraw-Hill.
Books.Co.Inc.), published in 1958, Fe−Si2 described on page 713
According to the elemental alloy phase diagram, the melting point of a Fe-Si alloy with 10% Si is 1310°C, and as the amount of Si decreases, the melting point becomes higher, and 25 to 45%
It can be seen that the melting point of the Fe-Si alloy of Si is also higher than 1300℃. However, 13-24% Si and 46-72% Si
It can be seen that the melting point of the Fe-Si alloy is below 1300℃. Therefore, in order to densify an Fe-Si based sintered alloy containing 1 to 10% Si by liquid phase sintering at a sintering temperature of 1300°C or lower, it is necessary to add the 13 to 24% Si. Containing Fe-Si alloy powder or (and) 46~
It is considered suitable to mix an appropriate amount of Fe-Si alloy powder containing 72% Si. <Means for Solving the Problems> Therefore, the method for producing an Fe-Si based sintered alloy according to the present invention is based on the Fe-Si alloy containing 13 to 24% Si.
A Fe-Si alloy powder containing 46 to 72% Si, or a mixture thereof, and an Fe-Si alloy powder having a higher melting point than the above-mentioned powder are mixed, and a compacted powder is produced from the mixed powder. 13.
Fe-Si alloy powder containing ~24% Si or
By sintering at a temperature higher than the melting point of Fe-Si alloy powder containing 46 to 72% Si,
It is characterized by a Si content of 1 to 10%. Here, the reason why the amount of Si after sintering was set to 1 to 10% is because
If the amount of Si is less than 1% or more than 10%, the magnetism of the sintered alloy decreases and is not practical as a magnetic material, so it is set at 1 to 10%. <Examples> Examples of the present invention will be described below. 10% of Fe-Si alloy powder produced by water spray method
The powder was classified into mesh and used as a mother alloy powder. On the other hand, an Fe-18%Si alloy ingot was made by melting in a vacuum induction furnace, and then mechanically crushed repeatedly to produce additive alloy powder with a particle size of several microns. In addition, a Fe-50% Si additive alloy powder was produced using the same method. Thereafter, as shown in Table 1, the mother alloy powder and additive alloy powder were mixed, 1% zinc stearate was added as a lubricant, and the mixture was pressed with a press pressure of 7 tf/cm 2 to form an outer diameter of 50 mm and an inner diameter of 50 mm. A green compact of 35 mm and 5 mm thickness was molded. Next, vacuum sintering was performed by holding each compact at each temperature for 1 hour, and the sintered density and DC magnetic properties were measured. The results are also listed in Table 1. As is clear from this table, the invention alloy, in which the additive alloy powder is mixed with the master alloy powder in a predetermined range and sintered at a temperature higher than the melting point of the additive alloy, sintered better than the basic alloy (No. 1). It can be seen that both the condensation density and DC magnetic properties are excellent. Furthermore, if the Si% (target value) after sintering is larger than the predetermined range, the sintered density will be higher than that of the basic alloy, but the DC magnetic properties (B25 value) will tend to decrease. Note that even if the Si% (target value) after sintering is within a predetermined range, if the sintering temperature is low, both the sintered density and DC magnetization characteristics are inferior to those of a sintered alloy with the same Si%.
【表】【table】
【表】
＜発明の作用・効果＞
以上説明したように、この発明は、融点が比較
的高いFe−Si系合金粉末に、融点が比較的低い
Fe−Si系合金粉末を混合し、この混合粉末から
圧粉体を成形し、この圧粉体を後者のFe−Si系
合金粉末の融点よりも低い温度で液相焼結するよ
うにした。
このため、実用的な焼結温度領域内の焼結温度
で、直流磁気特性に優れたFe−Si系焼結合金を
得ることができ、該Fe−Si系焼結合金を、ソレ
ノイドコア、磁気ヘツド等電磁機器の材料として
実用化することが可能となる。[Table] <Operations and effects of the invention> As explained above, the present invention provides Fe-Si alloy powder with a relatively high melting point and a relatively low melting point.
Fe--Si alloy powder was mixed, a green compact was formed from the mixed powder, and this green compact was subjected to liquid phase sintering at a temperature lower than the melting point of the latter Fe--Si alloy powder. Therefore, an Fe-Si sintered alloy with excellent direct current magnetic properties can be obtained at a sintering temperature within a practical sintering temperature range, and the Fe-Si sintered alloy can be used as a solenoid core, magnetic It becomes possible to put it into practical use as a material for electromagnetic equipment such as heads.
第１図は直流磁気特性とSi量との関係を示す曲
線図である。
FIG. 1 is a curve diagram showing the relationship between DC magnetic properties and Si content.
Claims (1)
46〜72％のSiを含有するFe−Si系合金粉末また
はこれらの混合物と、前記の粉末よりも高融点の
Fe−Si系合金粉末とを混合し、 該混合粉末から圧粉体を成形し、 該圧粉体を前記13〜24％のSiを含有するFe−
Si系合金粉末または46〜72％のSiを含有するFe
−Si系合金粉末の融点よりも高い温度で焼結する
ことにより焼結後のSi量が１〜10％となる Fe−Si系焼結合金の製造方法。[Claims] 1. Fe-Si alloy powder containing 13 to 24% Si;
Fe-Si alloy powder containing 46 to 72% Si or a mixture thereof and a powder having a higher melting point than the above powder.
A green compact is formed from the mixed powder, and the green compact is mixed with Fe-Si alloy powder containing 13 to 24% Si.
Si-based alloy powder or Fe containing 46-72% Si
- A method for producing an Fe-Si based sintered alloy in which the amount of Si after sintering is 1 to 10% by sintering at a temperature higher than the melting point of the Si based alloy powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56039262A JPS57155346A (en) | 1981-03-18 | 1981-03-18 | Fe-si sintered alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56039262A JPS57155346A (en) | 1981-03-18 | 1981-03-18 | Fe-si sintered alloy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57155346A JPS57155346A (en) | 1982-09-25 |
| JPH0248611B2 true JPH0248611B2 (en) | 1990-10-25 |
Family
ID=12548214
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56039262A Granted JPS57155346A (en) | 1981-03-18 | 1981-03-18 | Fe-si sintered alloy |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57155346A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH066738U (en) * | 1991-01-29 | 1994-01-28 | 株式会社ニフコ | Slide pad |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60165302A (en) * | 1984-02-09 | 1985-08-28 | Sumitomo Electric Ind Ltd | Preparation of soft magnetic sintered material |
| SE443264B (en) * | 1984-04-03 | 1986-02-17 | Hoeganaes Ab | Silica-containing stable powder for the production of sintered soft magnetic bodies |
| JP6523778B2 (en) * | 2015-05-07 | 2019-06-05 | 住友電気工業株式会社 | Dust core and manufacturing method of dust core |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4049522A (en) * | 1976-02-26 | 1977-09-20 | International Business Machines Corporation | Low coercivity iron-silicon material, shields, and process |
| JPS5347321A (en) * | 1976-10-12 | 1978-04-27 | Res Inst Iron Steel Tohoku Univ | Magnetic head material |
| JPS5353799A (en) * | 1976-10-26 | 1978-05-16 | Nippon Gakki Seizo Kk | Manufacturing process of magnetic materials |
-
1981
- 1981-03-18 JP JP56039262A patent/JPS57155346A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH066738U (en) * | 1991-01-29 | 1994-01-28 | 株式会社ニフコ | Slide pad |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57155346A (en) | 1982-09-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104919551B (en) | Manufacture method, compressed-core and the coil component of compressed-core | |
| US4894097A (en) | Rare earth type magnet and a method for producing the same | |
| JPWO2010073590A1 (en) | Composite soft magnetic material and manufacturing method thereof | |
| US5091022A (en) | Manufacturing process for sintered fe-p alloy product having soft magnetic characteristics | |
| USRE31317E (en) | Rare earth-cobalt system permanent magnetic alloys and method of preparing same | |
| JPH0248611B2 (en) | ||
| JPS63115309A (en) | Magnetic alloy powder | |
| JP2010185126A (en) | Composite soft magnetic material and method for producing the same | |
| JPH0412605B2 (en) | ||
| JP2654944B2 (en) | Composite dust core material and manufacturing method thereof | |
| JPH03278501A (en) | Soft magnetic core material and manufacture thereof | |
| JPS62256411A (en) | Permanent magnet with outstanding resistance to oxidation | |
| JPS55164048A (en) | Production of intermetallic compound ferromagnetic body | |
| KR100262488B1 (en) | Manufacturing method of sintered iron-silicon lead magnetic alloy | |
| JPH01155603A (en) | Manufacture of oxidation-resistant rare-earth permanent magnet | |
| JPS62282417A (en) | Manufacture of rare earth magnet | |
| JPS6349883B2 (en) | ||
| JP2000239702A (en) | Fe-Ni alloy powder and method for producing the same | |
| JPH0373612B2 (en) | ||
| JP2639812B2 (en) | Magnetic alloy powder for sintering | |
| JPH01180902A (en) | Fe powder for sintering | |
| JPS5940211B2 (en) | Cobalt-based sintered alloy for permanent magnets | |
| JPH1083910A (en) | Core and powder used for it | |
| JPH0339428A (en) | Manufacture of ni and b-containing rare earths-transition metal series magnet alloy stock | |
| JPH0450379B2 (en) |