Manufacturing method of rare earth magnet precursor or rare earth magnet molding having rough surface structure

摘要

Problem to be solved: to provide a method of producing a rare earth magnet precursor having a rough surface structure.Solution: the surface of the rare earth magnet precursor having a rough surface structure μ M(b) SZ is 50 to 1500 μ M(c) the SDR is formed with unevenness to satisfy at least one of the requirements of 0.3 toThe surface of the raw material forming body of the rare earth magnet precursor is irradiated with a pulsed wave laser beam to satisfy the requirements (I) - (V) to form a roughened structure.Manufacturing method of rare earth magnet precursor.(I) when the irradiation angle of the laser beam is 15 to 90 degrees (II) when the laser light is irradiated, the irradiation speed is 10 to 1000 mm / sec (III) when the laser beam is irradiated with the energy density of 0.1 to 50 GW / cm. Sup. 2 (IV), and the repetition frequency of the laser beam is 1 to 80 times (V) When the laser light is irradiated, the pitch interval is 0.01 to 1 mmNo selection