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首頁> 外文期刊>Magnetics, IEEE Transactions on >Development of Mo Containing Fe-Cr-Co Permanent Magnets by Modified Single Step Thermomagnetic Treatment
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Development of Mo Containing Fe-Cr-Co Permanent Magnets by Modified Single Step Thermomagnetic Treatment

機譯:改進的一步熱磁法制備含鉬的Fe-Cr-Co永磁體

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This paper is focused on a new approach, which was aimed to ease up the development of Fe-Cr-Co-Mo permanent magnets. Tri-arc melting technique under inert atmosphere of argon was used for the development of Fe-Cr-Co-Mo alloy. Solution treatment was done at a temperature of 1250 °C for 5 h followed by water quenching and then samples were subjected to thermomagnetic treatment (TMT) at 630 °C at predetermined cooling rates. The influence of TMT and cooling rates on the final magnetic properties of the alloy were investigated. Microstructural, X-ray diffraction, and magnetic characterization were carried out. It was observed that cooling rates and TMT temperature both affect the magnetic properties of material. Spinodal structure was observed at 50 k magnification of scanning electron microscope: rod like (alpha _{{{1}}}) phase (FeCo-rich) is embedded in the matrix of (alpha _{{2}}) -phase (Cr-rich). The average length of the (alpha _{{1}}) rod like particles is 150 ± 30 nm and the diameter is 30 ± 10 nm. Resultant magnetic properties are as 900 Oe ( ({{H}}_{{{c}}}) ), 10.4 kG ( ({{B}}_{{{r}}}) ), and 4.3 MGOe (BH (_{max }) ) with a two-step aging process and 810 Oe ( ({{H}}_{{{{c}}}}) ), 10.6 kG ( ({{B}}_{{{r}}}) ), and 3.6 MGOe (BH (_{max })) with continuous cooling up to 540 °C. The curr- nt method provides a quick and low cost manufacturing route for the Fe-Cr-Co-Mo permanent magnets with magnetic properties comparable with that of AlNiCo with the added advantage of having high ductility.
機譯:本文的重點是一種新方法,旨在簡化Fe-Cr-Co-Mo永磁體的開發。氬氣惰性氣氛下的三弧熔煉技術用于Fe-Cr-Co-Mo合金的研制。在1250°C的溫度下進行固溶處理5 h,然后水淬,然后以預定的冷卻速率在630°C的溫度下對樣品進行熱磁處理(TMT)。研究了TMT和冷卻速率對合金最終磁性能的影響。進行了微結構,X射線衍射和磁表征。觀察到冷卻速率和TMT溫度都影響材料的磁性能。掃描電子顯微鏡在50 k放大倍數下觀察到了旋節線結構:棒狀 (alpha _ {{{{1}}}) 相(富FeCo)嵌入在 (alpha _ {{2}}) 相(富鉻)。 (alpha _ {{1}}) 棒狀顆粒的平均長度為150±30 nm,并且直徑為30±10 nm。產生的磁性能為900 Oe( ({{H}} _ {{{c}}}) ),10.4 kG( ({{BB} _ {{{{r}}}) )和4.3 MGOe(BH (_ {max}) ),具有兩步老化過程和810 Oe(< inline-formula> ({{H}} _ {{{{c}}}}) ),10.6 kG( ({{B}} _ {{{r}}}) )和3.6 MGOe(BH (_ {max})) ,并持續冷卻至540°C。電流法為磁性材料與AlNiCo相當的Fe-Cr-Co-Mo永久磁鐵提供了一種快速而低成本的制造途徑,并具有延展性高的優點。

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