著者

植森 龍治 向井 俊夫 谷野 満

出版者

The Iron and Steel Institute of Japan

雑誌

鉄と鋼 (ISSN:00211575)

巻号頁・発行日

vol.77, no.11, pp.2060-2067, 1991-11-01 (Released:2009-06-19)

参考文献数

20

被引用文献数

1 1

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Partition of alloying elements between spinodally-decomposed phases in Fe-Cr-Co-Si alloys was examined by Atom-Probe Field-Ion Microscope (AP-FIM). The results showed that the ferromagnetic particle (α1) is rich in Fe and Co, and the weak-ferromagnetic matrix (α2) rich in Cr and Si. The enrichment of Si in the α2 phase was explained through thermodynamical considerations. Si is more strongly bonded to Cr than to Fe. The improvement of hard magnetic properties by Si additions was found and discussed in terms of the changes in saturation magnetization of the α1 and α2 phases. The increase in coercive force may be mainly attributed to the reduction of saturation magnetization of the α2 phase by the addition of Si.

著者

酒井 知彦 島津 高英 筑摩 顯太郎 谷野 満 松尾 宗次

出版者

社団法人日本鉄鋼協会

雑誌

鐵と鋼 : 日本鐡鋼協會々誌 (ISSN:00211575)

巻号頁・発行日

vol.70, no.15, pp.2049-2056, 1984-11-01

被引用文献数

3

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There are a few reports that Cu sulfides precipitate with the addition of Cu in the grain-oriented silicon steel, but the precipitates of Cu sulfides have not yet been well observed Thus, the observation of the precipitation of Cu sulfides is performed and the metallurgical effects of Cu addition on the grain-oriented silicon steel are studied. (1) With the addition of small amount of Cu, fine particles of (Cu, Mn) _<1.8>S (size 200&acd;500Å) precipitate and inhibition effects of normal grain-growth are enhanced. The distribution of Cu sulfides in hot rolled sheets provides beneficial geometrical situation to grow sharp Goss grains selectively during the secondary recrystallization. (2) In the texture at the subsurface of hot rolled sheets, {110}(001) grains are increased, and after decarburization, {554}<225^^-> and {110}<001> grainsare increased, on the other hand {100}<001> grains are decreased. These make secondary recrystallization easy. (3) When small amount of Cu is added and cold rolling reduction is increased from 55% to 65%, there are improvements of magnetic properties of grain-oriented silicon steel.