Invention Grant
- Patent Title: Method for producing neodymium-iron-boron rare earth permanent magnetic device
- Patent Title (中): 钕铁硼稀土永磁设备的制造方法
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Application No.: US14040712Application Date: 2013-09-29
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Publication No.: US09579724B2Publication Date: 2017-02-28
- Inventor: Haotian Sun
- Applicant: China North Magnetic & Electronic Technology Co., LTD
- Applicant Address: CN Shenyang, Liaoning Province
- Assignee: China North Magnetic & Electronic Technology Co., LTD.
- Current Assignee: China North Magnetic & Electronic Technology Co., LTD.
- Current Assignee Address: CN Shenyang, Liaoning Province
- Priority: CN201310160603 20130505
- Main IPC: B22F3/12
- IPC: B22F3/12 ; B22F9/04 ; H01F1/057 ; B22F3/24 ; H01F41/02 ; C22C38/00
Abstract:
A method for producing neodymium-iron-boron rare earth permanent magnetic materials mainly comprises processes of: alloy smelting, coarsely pulverization, milling, magnetic compaction, sintering, machining, vacuum heat treatment, and etc. Magnetic performance of permanent magnetic devices is increased by improving technologies of hydrogen pulverization, milling by jet mill, and vacuum heat treatment, in such a manner that usage amount of rare earth is decreased. The present invention is applicable in producing rare earth permanent magnetic materials having high performance.
Public/Granted literature
- US20150248968A1 Method for producing neodymium-iron-boron rare earth permanent magnetic device Public/Granted day:2015-09-03
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