| abstract |
The invention discloses a preparation method of sintered NdFeB, comprising the following steps: a. taking NdFeB alloy, and adopting a rapid-setting strip-spinning process to make a rapid-setting thin strip; b. adding MxNy dispersant, and after stirring, air friction Alloy powder; c. Put the alloy powder into the screening equipment for sieving treatment; d. Carry out orientation pressing of the alloy powder under a magnetic field, and perform cold isostatic pressing on the finished compact to make it Pressing to form a green body; e. The green body is sintered, and then subjected to primary tempering and secondary tempering to obtain a sintered NdFeB magnet. |