| 简介 |
PROBLEM TO BE SOLVED : To facilitate the manufacture of a miniature thin-walled permanent magnet by a method, wherein after providing a metallic layer such as solder, etc., on the surface of a quenched alloy thin band in a specific composition containing rare-earth element and boron, after cutting off in a specific length or stamping out in an arbitrary shape, more than two sheets of the thin bands are laminated and integrated by crystallizing-heat treatment. SOLUTION : An alloy molten metal containing rare-earth element not exceeding 6 at.% and boron in 15 at%-30 at.% is formed into an amorphous thin band in a mean thickness of 10 μm-100 μm by molten metal quenching process, using a rotating roll in an inert gas atmosphere not exceeding 30 kPa. Next, a metallic layer in the melting point, not exceeding 550 deg.C formed on the surface of this amorphous thin band by plating or evaporating process, is cut down or stamped out into a specific shape. Next, more than two sheets of the amorphous thin bands are laminated in an arbitrary thickness and crystallizingly heat-treated, so that the surface metallic layer may be melted down to firmly couple the thin bands with each other for manufacturing a laminated permanent magnet. |
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