Samarium-cobalt magnet cast piece, processing method thereof, samarium-cobalt rare earth magnet and preparation method ofmagnet

[0046] Preparation of the cobalt magnet smelting casting piece: First, according to the composition of the formulation, the ingredient is used, and then the metal material is melted after mildness in the manner in which the metal material is melted, and the cooled cooled ring wall (centrifugal casting) or Water-cooled book molding (book type casting) is cast, depending on the rotational speed of the cooling end, the molten alloy liquid can be cast into a different thickness alloy sheet or alloy block, and those skilled in the art can appropriately select according to the purpose. Preparation method and formulation.

[0047] The homogenization treatment of the cobalt magnet smelting casting piece: The temperature of the homogenization process is 1100 to 1200 ° C, in particular 1100 ° C, 1120 ° C, 1130 ° C, 1140 ° C, 1150 ° C, 1180 ° C, 1190 ° C; the homogenization The processing time satisfies the following formula: D + 2.5 ≤ T ≤ D + 4.5, specifically T = D + 2.5, T = D + 3, T = D + 3

[0056] Example 1

[0057] (1) Raw materials formulation and smelting

[0058] Following the formulation, the raw material was placed in a crucible of the vacuum induced melting furnace, and the cooled cooled ring wall was cast in the rotary cooling ring wall, and cooled the thickness of 2.5 mm socarnium molten ingot. The atomic percentage of each element of the cobalt magnet smelting ingot of the present embodiment is: SM is 11.55 at%, Fe is 20 at%, CO is 62.62 at%, Cu is 4.38 at%, Zr is 1.45 at%.

[0059] (2) Uniform treatment

[0060] The smelting ingot made by step (1) is subjected to a homogenization process, and the specific time and temperature of the homogenization process are taken in Table 1.

[0061] (3) Crushing: The ingot after homogenization is crushed with ordinary jaw crushing, and the crude crushing particle size is <40. The powdered powder after crude crushing is further broken, and the ground powder of the average particle size is 3 μm to 5 μm.

[0062] (4) Pressure

[0075] Example 2

[0076] (1) preparation of raw materials and smelting

[0077] A formulation according to formulation starting material, and the raw material placed in a vacuum induction melting furnace crucible after vacuum melting and refining insulation, cast on a rotating cooling ring wall or a rotating cooling roller or book-type molds and cooled to give a different thickness SmCo magnets melting melting an ingot or samarium cobalt magnet band rejection sheet (hereinafter referred to as samarium-cobalt magnets melting slab). Atomic percent samarium cobalt magnet of the present embodiment, each element of the slab melting follows: Sm of 11.55at%, Fe is 20at%, Co of 62.62at%, Cu is 4.38at%, Zr is 1.45at%. Samarium-cobalt magnets melting slab thickness shown in Table 3.

[0078] (2) homogenizing treatment

[0079] The step (1) obtained after melting slab equalization process, the equalization process time 1180 ℃, the equalization process of the specific time and temperature shown