Method for improving magnetic property of cerium-rich magnet by mixing hydrogenation

• Main Authors: ZOU NING, ZOU YUQIN, LYU ZHONGSHAN, ZOU YONGBO, JIN CHAOXIANG
• Format: Patent
• Language: Chinese; English
• Published: 09.11.2018
• Subjects: ALLOYS; BASIC ELECTRIC ELEMENTS; CHEMISTRY; ELECTRICITY; FERROUS OR NON-FERROUS ALLOYS; INDUCTANCES; MAGNETS; METALLURGY; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES; TRANSFORMERS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention discloses a method for improving magnetic performance of cerium-rich magnet by mixing hydrogenation, which comprises the following steps: 1) accelerated coagulation: an accelerated coagulation process is used to prepare accelerated coagulation tablet; 2) hydrogen breaking: a hydrogen breaking process is used to break the accelerated coagulation tablet into hydrogen breaking powder; 3) air grinding: a air grinding process is used to further break the hydrogen breaking powder into fine powder; 4) stirring: the fine powder after air grinding is stirred evenly in a mixture of nitrogen and hydrogen; 5) molding: the fine powder after evenly stirring is formed by magnetic field orientation and isostatic pressing to form green billet; 6) sintering: the green billet is made to form cerium-rich magnet through vacuum sintering and tempering heat treatment; in the method, microscale hydrogen is added into the mixing steps of fine powder, not only is the oxidation of the cerium-rich magnet powder reduced, bu