METHOD FOR MANUFACTURING SINTERED BODY FOR FORMING SINTERED MAGNET, AND METHOD FOR MANUFACTURING PERMANENT MAGNET USING SINTERED BODY FOR FORMING SINTERED MAGNET
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United States of America Patent
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Jul 18, 2019
app pub date -
Sep 22, 2017
filing date -
Sep 22, 2017
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Abstract
Provided are: a method for manufacturing a sintered body as a base of a sintered magnet and a method for manufacturing a permanent magnet. Specifically, a magnet raw material is pulverized into magnet powder, the magnet powder pulverized and a binder are mixed, thereby to form a compound. The, a formed body, obtained by forming the compound formed, is sintered by heating up the same to a firing temperature in a pressed state at a predetermined heat-up rate, and by keeping the same at the firing temperature. In the sintering step, the pressure value for pressing the formed body is set to: less than 3 MPa from the start of heating up of the formed body to a predetermined timing during heating up of the formed body; and 3 MPa or more after the timing.
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