| 简介 |
PURPOSE : To produce a rare earth alloy ingot for producing a bond magnet excellent in magnetic properties by specifying the cross-sectional dimensional ratio of a rare earth allay ingot for an R-T-(M)-B permanent magnet and obtaining an ingot in which the concn. of tetragonal Nd2 Fe14B type compounds is regulated to a high one and the concns. of R and B areas are regulated to low ones. CONSTITUTION : As for an ingot constituted of 11.5 to 12.5 at% R (R denotes at least one kind among rare earth elements including Y, and one or more kinds of Pr and Nd are contained by>=50 at% in R), 79 to 83at% T (Fe or a part of Fe is substituted by =30mm, the thickness (d) to 10 to 35mm and the ratio of L/d to >=3.0, and tetragonal Nd2Fe14B type compounds are allowed to present by >=85% in the allay and the areas of 11.0% R and =20% by volume ratio. Thus, the ingot for producing a bond magnet excellent in magnetic properties can be obtd. |
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