Patent ID: 7258751

Claim:
A production method of a material alloy for an R-T-Q rare earth sintered magnet comprising: a step of preparing a molten alloy of an R-T-Q rare earth alloy (R is a rare earth element, T is a transition metal element, and Q is at least one element selected from the group consisting of B, C, N, Al, Si, and P), the rare earth element R containing at least one kind of element R L selected from the group consisting of Nd and Pr, and at least one kind of element R H selected from the group consisting of Dy, Tb, and Ho; a cooling step of rapidly solidifying the molten alloy, thereby producing a rapidly solidified alloy comprising an R 2 T 14 Q crystal phase; and a thermal treatment step of holding the rapidly solidified alloy in a temperature range of 400° C. or higher and lower than 800° C. for a period of not shorter than 5 minutes nor longer than 12 hours.