Method for preparing corrosion resistance rare earth permanent-magnetic material
A rare-earth permanent magnet and corrosion-resistant technology, which is applied in the fields of magnetic materials, inorganic material magnetism, inductor/transformer/magnet manufacturing, etc., can solve the problems of corrosion resistance constraints, easy corrosion, and limited improvement space, and achieve improved corrosion resistance , reduced weight loss, superior corrosion resistance
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[0015] Example 1:
[0016] 1) Prepare the main and auxiliary alloy ingots separately, the atomic percentage composition of the main alloy is Nd: 9.5%, Dy: 1.5%,
[0017] Fe: 81.5%, B: 5.5%, Al: 2%, the atomic percentage composition of the auxiliary alloy is Nd: 59.9%, Co:
[0018] 29.9%, Al: 9.9%, Dy: 0.1%, Fe: 0.1%, Cu: 0.1%.
[0019] 2) The main and auxiliary alloys are powdered separately, and the average particle diameter is made by the junior high school fine crushing under the protection of nitrogen atmosphere
[0020] It is about 6.5μm powder.
[0021] 3) Mix the main and auxiliary alloy powders in a weight ratio of 9:1, while adding 3% of the total weight of the alloy
[0022] Ethylene oxide alkyl ether and 1% gasoline are uniformly mixed into a mixed powder in a mixer.
[0023] 4) Pass the mixed powder through a magnetic field orientation pressing press for the first time under 8MPa pressure and 1.7T orientation magnetic field
[0024] Forming, and then secondary pressing...
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[0029] Example 2:
[0030] 1) Prepare the main and auxiliary alloy ingots respectively. The atomic percentage composition of the main alloy is Nd: 9%, Dy: 1%, Pr: 1%, Tb: 1%, Fe: 78%, Co: 4%, B: 6%, the atomic percentage composition of the auxiliary alloy is Nd: 30%, Pr: 10%, Dy: 10%, Co: 29.9%, Fe: 0.1%, Al: 10%, Cu: 5%, Ga: 5%.
[0031] 2) The main and auxiliary alloys are powdered separately. Through the junior high school fine crushing under the protection of nitrogen atmosphere, powder with an average particle diameter of about 6.5μm is produced.
[0032] 3) Mix the main and auxiliary alloy powders in a weight ratio of 9:1, while adding the antioxidant polyethylene oxide alkyl ether accounting for 3% of the total weight of the alloy powder and gasoline accounting for 1% of the total weight of the alloy powder in the mixer. Mix evenly into a mixed powder.
[0033] 4) The mixed powder is firstly compressed and molded by a magnetic field orientation pressing machine under a pres...
Example Embodiment
[0036] Example 3:
[0037] 1) Prepare the main and auxiliary alloy ingots separately, the atomic percentage composition of the main alloy is Nd: 7%, Dy: 3%, Tb: 2%, Fe: 78%, Co: 4%, B: 6%, auxiliary alloy The atomic percentage composition of Nd: 40%, Pr: 15%, Fe: 5%, Co: 25%, Al: 10%, Cu: 2%, Ga: 2%, Nb: 1%.
[0038] 2) The main and auxiliary alloys are powdered separately. Through the junior high school fine crushing under the protection of nitrogen atmosphere, the powder with an average particle diameter of about 5.5μm is produced.
[0039] 3) Mix the main and auxiliary alloy powders in a weight ratio of 88:12, and add the antioxidant polyethylene oxide alkyl ether which accounts for 3% of the total weight of the alloy powder and gasoline which accounts for 1% of the total weight of the alloy powder. Mix evenly into a mixed powder.
[0040] 4) The mixed powder is firstly compressed and molded by a magnetic field orientation pressing machine under a pressure of 8 MPa and an orien...
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