A kind of preparation method of high performance sintered samarium cobalt magnet
A samarium cobalt magnet, high-performance technology, applied in the manufacture of inductors/transformers/magnets, electrical components, circuits, etc., can solve the problem of low content of Cu element at the grain boundary of permanent magnets, incomplete formation of cellular structure, and improved remanence of magnets No effect, etc., to achieve the effect of improving the orientation of the magnet, increasing the pinning strength, and reducing the frictional force
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[0041] like figure 1 As shown, the present invention provides a preparation method of a high-performance sintered samarium cobalt magnet, which comprises the following steps:
[0042] (1) Preparation of alloy powder A
[0043] The samarium cobalt alloy raw materials are prepared according to the following weight percentages: (Sm 1-x Re x): 22~24%, Fe: 20~25%, Zr: 2~3%, Cu: 2~4%, the remainder is Co, 0≤x≤0.5; among them, Re is one of Pr and Nd or both;
[0044] Usually, the total mass percentage of rare earth Sm or Sm and other rare earth mixtures in the samarium cobalt alloy raw material is 25~27%. In this experiment, the raw material used a lower Sm content. By adding praseodymium copper alloy powder during powder mixing, the rare earth Pr element is effectively introduced , so that the rare earth content of the final magnet is in a suitable range, and during sintering and solid solution, Pr element enters into the cellular phase to form Pr 2 Co 17 phase, which can effe...
Embodiment 1
[0062] (1) Preparation of alloy powder: prepare samarium cobalt alloy raw materials according to the following weight percentages: Sm: 22.3%, Fe: 21%, Zr: 2.5%, Cu: 3%, Co: 51.2%;
[0063] The prepared raw materials are smelted in an intermediate frequency induction melting furnace, and then cast in a double-sided water-cooled copper mold to prepare an alloy ingot with an average thickness of 20cm; and then use a hammer crusher to crush the alloy ingot to 0.5~ Alloy particles with a size of 2mm; the alloy particles are made into alloy powder with an average particle size of 4.5μm by using the jet milling technology. In the process of jet mill milling, the oxygen concentration in the jet mill gas path is controlled at 100~500ppm;
[0064] (2) Preparation of auxiliary powder: prepare praseodymium copper alloy raw materials according to the following weight percentages: Pr: 80%, Cu: 20%; repeatedly smelting the prepared raw materials in an electric arc melting furnace to prepare ...
Embodiment 2
[0070] (1) Preparation of alloy powder: The samarium cobalt alloy raw materials were prepared according to the following weight percentages: Sm: 24%, Fe: 22%, Zr: 2.6%, Cu: 4%, Co: 47.4%.
[0071] The prepared raw materials are smelted in an intermediate frequency induction melting furnace, and then cast in a double-sided water-cooled copper mold to prepare an alloy ingot with an average thickness of 20cm; and then use a hammer crusher to crush the alloy ingot to 0.5~ Alloy particles with a size of 2mm; the alloy particles are made into alloy powder with an average particle size of 4.3μm by using the jet milling technology. In the process of jet mill milling, the oxygen concentration in the jet mill gas path is controlled at 100~500ppm;
[0072] (2) Preparation of auxiliary powder: Prepare praseodymium copper alloy raw materials according to the following weight percentages: Pr: 50%, Cu: 50%; repeatedly smelting the prepared raw materials in an electric arc melting furnace to ...
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