81 results about "Samarium cobalt" patented technology

A diffusion preparation method of a Fe-rich high-coercivity samarium-cobalt magnet belongs to the technical field of magnetic material preparation, solves the technical problems that the Fe-rich samarium-cobalt magnet is not easy to form a good cellular structure and the process flow is long, and comprises the following steps: S1, weighing a samarium-cobalt permanent magnet alloy raw material, and preparing an alloy ingot; s2, alloy particles are prepared through a mechanical crushing method, and the alloy particles are prepared into alloy powder; s3, the samarium-cobalt alloy powder is subjected to magnetic field orientation forming and cold isostatic pressing forming, and a green body is prepared; s4, performing sintering solution treatment on the green body to prepare a sintered samarium-cobalt permanent magnet blank, and processing the blank into a samarium-cobalt magnet sheet; s5, performing primary PrCu diffusion treatment on the samarium-cobalt magnet sheet; s6, the magnet sheet is subjected to secondary SnFe diffusion treatment; and S7, performing aging treatment on the secondary diffusion sheet to obtain the samarium-cobalt permanent magnet. The preparation method provided by the invention is easy to operate, control and industrialize, and the prepared Fe-rich sintered samarium-cobalt magnet is excellent in performance.

The invention relates to a high-mechanical-property samarium-cobalt magnet and a preparation method thereof, and belongs to the field of magnetic materials. The preparation method of the high-mechanical-property samarium-cobalt magnet comprises the steps of powder laying and pressing, specifically, samarium-cobalt A powder and samarium-cobalt B powder are alternately laid, it is guaranteed that the lowest layer and the uppermost layer are the samarium-cobalt B powder, and the particle sizes of the samarium-cobalt A powder and the samarium-cobalt B powder are different; the weight of the samarium cobalt A powder is 5wt.%-50wt.%, and the weight of the samarium cobalt B powder is 95wt.%-50wt.%. The obtained magnet not only has high bending strength, but also has excellent magnetic performance. Through detection, the bending strength of the obtained samarium-cobalt magnet is 145 MPa or above, and the maximum magnetic energy product is 28.11 MGOe or above.

The invention discloses ultra-low-oxygen high-stability samarium-cobalt permanent magnet ultrafine powder, a preparation method thereof and a samarium-cobalt permanent magnet, and belongs to the technical field of permanent magnet materials.The preparation method comprises the steps that samarium-cobalt permanent magnet coarse powder is put into a sanding powder tank which has ultra-low water and oxygen content and is protected by inert gas, and then a dispersing agent and an organic solvent are added to be stirred and mixed to be uniform; and then introducing the samarium cobalt coarse powder in the powder into sanding equipment to obtain the samarium cobalt powder. The particle size of the samarium-cobalt permanent magnet material ultrafine powder can be stably kept at about 1 mu m, the oxygen content is within 10 ppm, the problem that the ultrafine powder is prone to oxidation, prone to combustion and difficult to transfer is solved by means of a sand grinding process in a vacuum glove box, and the particle size of the samarium-cobalt permanent magnet material is greatly reduced by means of a double-tank circulating sand grinding process. The acquisition rate of the samarium-cobalt permanent magnet material ultrafine powder and the uniform stability of the granularity of the ultrafine powder are improved; by adopting the ultrafine powder, a heterogeneous samarium-cobalt magnet with high mechanical property and low anisotropy can be prepared, so that the application range of the samarium-cobalt ultrafine powder is widened.

The invention discloses a preparation method for rare earth permanent magnet single-piece forming, and belongs to the technical field of rare earth permanent magnet preparation. Comprising the following steps that 1, raw material powder is prepared, specifically, rare earth alloy is smelted and then condensed into sheets, then fine powder is obtained through a hydrogen explosion crushing technology, an antioxidant and a grain refiner are added, and the raw material powder is obtained through uniform mixing; 2, single-sheet mold orientation pressing, wherein the single-sheet mold with a nanometer coating is used for conducting two-step pressing on the raw material powder under the pulsed magnetic field; step 3, sintering and post-processing: sintering the material obtained by pressing in the step 2 in stages, and then applying an auxiliary magnetic field for cooling; the invention specifically focuses on an innovative method for preparing a high-performance rare earth permanent magnet by means of a single-piece forming process. The method has remarkable advantages and wide applicability in the aspect of efficient and low-cost production of permanent magnets such as neodymium iron boron and samarium cobalt.

The invention relates to the technical field of permanent magnet materials, in particular to a method for increasing resistance of a permanent magnet, which comprises the following steps of: (1) weighing raw materials, smelting and refining to obtain alloy melt; (2) the alloy melt is subjected to cooling, powdering, forming, sintering treatment and aging treatment, cooling is conducted, and a samarium cobalt blank is obtained; (3) the samarium cobalt blank is subjected to machining grinding, slicing, end face grinding, cleaning and drying, and a plurality of flaky magnets are prepared; sequentially performing argon plasma treatment and nitrogen plasma treatment on each end surface of the flaky magnet, and sputtering a boron nitride layer and a silicon dioxide layer on the end surface of the flaky magnet by adopting a magnetron sputtering method; and carrying out annealing treatment, bonding and curing treatment to obtain the high-resistance permanent magnet. According to the method for increasing the resistance of the permanent magnet, the resistance of the rotor magnet can be effectively increased, and eddy current generated by the motor rotor magnet is further reduced.

The invention relates to a samarium cobalt permanent magnet and a preparation method thereof. The preparation method comprises the following steps: providing a samarium-cobalt alloy; the samarium-cobalt alloy is subjected to oxidation heat treatment, the oxidation heat treatment process meets the following relational expression: t = kP / T, t is the heat preservation time, and the unit is h; t is the heating temperature, and the unit is DEG C; p is the vacuum degree, and the unit is Pa; k is a coefficient, and k is equal to 100 to 5000; crushing and pulverizing the samarium-cobalt alloy subjected to oxidation heat treatment to obtain alloy powder; and carrying out orientation molding on the alloy powder to obtain a samarium-cobalt green body, and carrying out sintering treatment to obtain the samarium-cobalt permanent magnet. According to the preparation method, the bending strength can be greatly improved while the high-hardness magnetic performance of the samarium-cobalt permanent magnet is guaranteed, the preparation process is simple and efficient, and the preparation method is suitable for industrial production.

The invention discloses a samarium-cobalt magnet and a preparation method thereof. The samarium-cobalt magnet takes low-melting-point alloy powder, samarium oxide powder and samarium-cobalt magnetic powder as raw materials; the component of the samarium cobalt magnetic powder is Sm (Co < 1-a-b-c > Fe Cu Zr < c >) < z >; the component of the low-melting-point alloy is RE1-xMx, RE is one or more of Pr, Nd and Sm, and M is one or more of Cu, Al and Ga. The preparation method comprises the following steps: smelting a samarium-cobalt alloy raw material and a low-melting-point alloy raw material, and sequentially performing coarse crushing, medium crushing and jet milling to obtain samarium-cobalt magnetic powder and low-melting-point alloy powder; mixing samarium oxide powder, low-melting-point alloy powder and samarium cobalt magnetic powder to obtain magnetic powder; sequentially performing magnetic field forming, cold isostatic pressing and low-temperature sintering to obtain a sintered blank; and the sintered blank is sequentially subjected to solution treatment and aging heat treatment. The bending strength and the fracture toughness of the samarium-cobalt magnet are greatly improved, and the samarium-cobalt magnet has high magnetic performance and good mechanical performance.

The invention discloses a rotor topological structure for preventing demagnetization of magnetic steel, which comprises a rotor iron core, the rotor iron core is provided with a plurality of magnetic poles, main magnetic steel grooves which are symmetrically arranged in a V shape are arranged on the rotor iron core under the same magnetic pole, and main magnetic steel made of neodymium iron boron materials is embedded in the main magnetic steel grooves. Auxiliary magnetic steel grooves are respectively arranged near two end parts of the main magnetic steel close to the excircle direction of the rotor, auxiliary magnetic steel made of samarium cobalt materials is embedded in the auxiliary magnetic steel grooves, and the auxiliary magnetic steel is used for increasing the local magnetic resistance of the area where the auxiliary magnetic steel is located so as to restrain the demagnetization of the end parts of the main magnetic steel; the design cost of the rotor topological structure is slightly increased, the influence on a main magnetic field is small, and the anti-demagnetization capability can be remarkably improved.

The invention belongs to the technical field of permanent magnet materials, and relates to a preparation method of a high-strength and high-toughness samarium-cobalt permanent magnet, which comprises the following steps: burdening, smelting, pulverizing, orientation forming, cold isostatic pressing, sintering, solid solution and aging treatment. The aging treatment comprises the following steps: under the protection of inert gas, carrying out primary heat treatment at 780-880 DEG C for 500-1500 minutes, then closing the inert gas, cooling to 200-500 DEG C, carrying out secondary aging treatment, carrying out heat preservation for 30-600 minutes, applying an external magnetic field, and finally cooling to room temperature. According to the method, an external magnetic field is added during secondary aging, gas protection is cancelled, the gas cost is reduced, and meanwhile, the mechanical property of the samarium-cobalt magnet is greatly improved under the condition that it is guaranteed that the magnetic property is basically unchanged.

The invention discloses a preparation method of a samarium-cobalt magnet, which comprises the following steps: S1, taking 24-27% of metal samarium, 48-58% of metal cobalt, 4-7% of pure copper, 2-5% of sponge zirconium and the balance of pure iron as smelting raw materials; s2, under the protection of inert gas, the smelting raw materials are put into a smelting furnace to be melted, and an ingot material is obtained through smelting; s3, carrying out jaw crushing on the obtained ingot, then carrying out intermediate crushing to obtain small particles, and carrying out airflow grinding to obtain powder, so as to obtain samarium cobalt powder; s4, under the protection of inert gas, the samarium cobalt powder is placed in a magnetic field for orientation forming, then isostatic pressing is conducted, and a green body is obtained; s5, performing high-temperature sintering on the green body under a vacuum condition to obtain a sintered magnet; and S6, grinding the sintered magnet according to the designed shape to obtain the samarium-cobalt magnetic steel. According to the preparation method, specific components and component proportions are adopted, so that the temperature resistance of the samarium-cobalt magnet is improved while the samarium-cobalt magnet has good magnetic performance, and the samarium-cobalt magnet can maintain magnetism at a higher temperature.

The present application provides a samarium cobalt permanent magnet material and a preparation method thereof. The preparation method comprises: step S1, according to the nominal composition Sm u Co v Cu w Fe x Zr y (Gd 0.5 Er 0.5 ) 0.5‑z Dy z The invention relates to a method for preparing a mixture by mixing ingredients; step S2, smelting and casting the mixture under an inert atmosphere to obtain an ingot; step S3, crushing the ingot to obtain alloy powder; step S4, orienting and forming the alloy powder and pressing the alloy powder to obtain a green body; step S5, sintering and solution treating the green body to obtain a samarium-cobalt solid solution magnet; step S6, providing a metal coating layer on the surface of the samarium-cobalt solid solution magnet and performing an aging treatment to obtain a samarium-cobalt permanent magnet material. Heavy rare earth elements and medium-heavy rare earth elements (Er) are added to the raw materials to compensate for the negative temperature coefficient of residual magnetism. At the same time, through the coordination of the above steps, especially the aging treatment after coating the metal coating layer, the microstructure of the samarium-cobalt magnet is regulated, so that the samarium-cobalt permanent magnet material has an excellent low temperature coefficient of residual magnetism, a maximum operating temperature of 500°C, and excellent initial magnetic properties at room temperature.

This invention relates to a method for improving the machining quality and yield of samarium cobalt magnets, belonging to the field of precision machining technology for rare earth permanent magnet materials. The method includes: crystal orientation detection and determination of the free-cutting direction, directional compensation cutting, segmented temperature-controlled precision grinding, stepped vacuum stress relief treatment, and online closed-loop detection. Through five-segment coordinated control, the dimensional accuracy reaches ±0.003mm, the chipping and cracking defect rate is less than 0.5%, and the yield is increased to over 98%.

The utility model discloses a lightweight permanent magnet synchronous motor for an electric aircraft. An electromagnetic structure in the motor comprises a stator iron core, an armature winding, a permanent magnet, a rotor magnet yoke and a rotor bracket, the stator iron core is of an annular columnar structure, stator grooves penetrating through the axial direction are evenly formed in the end face of the stator iron core in the circumferential direction, and armature windings are arranged in the stator grooves. A rotor magnet yoke is arranged to be of an annular thin-wall structure, a plurality of pole permanent magnets which are sequentially connected are evenly pasted to the outer ring wall face of the rotor magnet yoke in the circumferential direction, and an excitation assembly of an annular columnar structure is formed by the pole permanent magnets. The rotor magnet yoke and the permanent magnets of each pole adhered to the outer side wall of the rotor magnet yoke are mounted on the inner side of the stator iron core through the rotor bracket, and the permanent magnets of each pole and the inner side wall of the stator iron core form an annular thin-wall gap, so that the rotor magnet yoke, the permanent magnets of each pole and the rotor bracket rotate relative to the stator iron core; the permanent magnet of each pole is of a segmented structure and is divided into four segments which are arranged in a central symmetry mode, and the four segments comprise the two samarium cobalt permanent magnets located in the middle and the two neodymium iron boron permanent magnets located on the two sides. According to the technical scheme of the utility model, the problem that as most of the existing aviation permanent magnet synchronous motors adopt high-speed and high-electromagnetic-load design, the temperature rise of the motors is too high, and the stable operation of the motors is greatly threatened is solved.

The invention provides a method for preparing a samarium-cobalt permanent magnet material based on pre-aging treatment, and relates to the technical field of samarium-cobalt permanent magnet materials. The invention discloses a method for preparing a samarium cobalt permanent magnet material based on pre-aging treatment. The method comprises the steps of precursor preparation, solution treatment, pre-aging treatment, rapid cooling, main aging treatment and the like. Through pre-aging treatment, segregation of solute atoms is promoted at low temperature, high-concentration point defects are formed, uniform and high-density nucleation sites are provided for main aging Sm (Co, Cu) 5 cell wall phase precipitation, precipitation kinetics is accelerated, a nano cellular structure is refined, fine regulation and control of a microstructure are achieved, and the mechanical properties of the Sm (Co, Cu) 5 are improved. The intrinsic coercive force of the magnet is remarkably improved, the residual magnetism and the maximum magnetic energy product of the magnet are synergistically improved, and the prepared samarium-cobalt permanent magnet material is higher in cell wall density, more uniform in distribution and more excellent in comprehensive magnetic performance.

The utility model relates to the technical field of samarium-cobalt magnetic steel, and discloses samarium-cobalt magnetic steel for communication equipment, which comprises a box body, arc-shaped clamping plates are attached to the upper side and the lower side of the box body, arc-shaped magnetic steel is attached to the inner walls of the arc-shaped clamping plates and the side surfaces of the box body, arc-shaped baffles are attached to the front side and the rear side of the arc-shaped magnetic steel, and the arc-shaped baffles are attached to the inner walls of the arc-shaped clamping plates and the side surfaces of the box body. The surfaces of the arc-shaped baffles are fixedly connected with the inner walls of arc-shaped clamping plates, sliding plates are fixedly connected to the left sides and the right sides of the arc-shaped clamping plates correspondingly, and sliding holes are formed in the upper side and the lower side of the box body correspondingly. According to the samarium-cobalt magnetic steel, the box body, the arc-shaped clamping plates, the arc-shaped baffles, the sliding plates, the sliding holes, the fixing holes, the fixing supports and the threaded columns are matched, so that a plurality of pieces of arc-shaped magnetic steel can be combined or disassembled, and when a certain piece of arc-shaped magnetic steel on the samarium-cobalt magnetic steel is damaged, the samarium-cobalt magnetic steel can be continuously used by replacing the damaged arc-shaped magnetic steel; therefore, the maintenance cost of the communication equipment is reduced.

This application relates to the technical field of magnetic materials, and particularly to a method for improving the coercivity of samarium-cobalt magnets by high-stress electric pulse heating pre-aging, which includes the following steps: placing metal raw materials in a vacuum induction furnace according to the ratio for melting to obtain an ingot, and crushing the ingot to obtain alloy powder; molding the alloy powder in a magnetic field by die pressing and obtaining a green compact by cold isostatic pressing; sintering and solution treating the green compact to obtain a solution-treated samarium-cobalt magnet; performing high-stress pre-aging treatment on the solution-treated samarium-cobalt magnet by using plasma discharge sintering technology; sequentially performing the first aging treatment and the second aging treatment on the sample after high-stress pre-aging treatment to obtain a samarium-cobalt magnet. This application conducts high-stress pulsed current heating pre-aging treatment on the samarium-cobalt solution-treated sample. By using this process, the stress and defects in the sample before the aging process can be regulated, and then the microstructure and magnetism of the final sample can be regulated, especially manifested as a significant increase in coercivity.

The utility model relates to the technical field of radial cylindrical samarium-cobalt magnetic steel, and discloses radial cylindrical samarium-cobalt magnetic steel which comprises a magnetic steel body, a first cylinder is fixedly connected to the inner wall of the magnetic steel body, a first strip-shaped hole is formed in the first cylinder, a sliding groove is formed in the inner wall of the magnetic steel body, and a second strip-shaped hole is formed in the sliding groove. Supporting columns are arranged on the inner wall of the sliding groove and the inner wall of the first strip-shaped hole, round holes are formed in the supporting columns, round columns are fixedly connected to the inner walls of the round holes, and a second strip-shaped hole is formed in the first cylinder. Through cooperation of the first cylinder, the first strip-shaped hole, the sliding groove, the supporting column, the round hole, the round column, the second strip-shaped hole and the pressing support, after the fixing support and the pressing support are separated, the supporting column can freely slide in the first strip-shaped hole, and due to the fact that a certain gap exists between the first cylinder and the rotating shaft, the supporting column can be conveniently fixed. Therefore, the samarium-cobalt magnetic steel cannot be clamped on the rotating shaft, and the samarium-cobalt magnetic steel is more convenient to disassemble.

The invention belongs to the technical field of flexible magnetic materials, and particularly relates to a flexible magnetic material and a preparation method and application thereof. The flexible magnetic material comprises the following components in parts by mass: 80-90 parts of magnetic powder, 10-15 parts of a binder, 1-2 parts of a plasticizer, 0.4-0.9 part of a vulcanizing agent and 0.5-1.0 part of an anti-aging agent, the magnetic powder is selected from at least one of modified neodymium iron boron magnetic powder, ferrite, samarium iron nitrogen and samarium cobalt; the modified neodymium iron boron magnetic powder is prepared by using bis [3-(triethoxy silyl) propyl] tetrasulfide for modification; the binder is prepared from NBR rubber A, NBR rubber B and natural rubber according to the mass ratio of (1.3 to 1.5) to (0.4 to 0.6) to (0.8 to 1.0). The flexible magnetic material has excellent magnetic performance and mechanical performance, and is good in stability.

The invention relates to a samarium-cobalt permanent magnet and a preparation method thereof, the preparation method comprises the steps of powder preparation, forming and heat treatment, in the step of powder preparation, coarse powder of samarium-cobalt alloy and inorganic materials are mixed and then subjected to jet milling treatment to obtain fine powder, the inorganic materials comprise fluorides and oxides, the addition amount of the fluorides is MF and # imgabs0 # of the mass of the coarse powder, k1 is equal to 0.1-2, and k2 is equal to 0.1-2; p is the pressure of the jet mill, v is the rotating speed of the jet mill, R is a numerical value obtained by multiplying the sum of the mass fractions of Fe and Co in the samarium-cobalt alloy by 100, d is the particle size of fluoride, the addition amount of the oxide is MO, # imgabs 1 # and k2 of the mass of the coarse powder, and the addition amount of the inorganic material is 1.5-10 wt% of the mass of the coarse powder. According to the invention, the microstructure of the magnet can be optimized by regulating and controlling the addition mode and the addition proportion of the fluoride and the oxide, so that the resistivity and the mechanical property of the samarium-cobalt permanent magnet can be improved on the basis of not sacrificing the magnetic property of the samarium-cobalt permanent magnet.

A magnet includes a three-dimensional structure with nanoscale features, where the three-dimensional structure has a near net shape corresponding to a predefined shape.

This invention relates to the field of microwave ferrite device technology and discloses a dual-section microstrip circulator, comprising: a magnetic sheet, and a ferrite gyromagnet and a resistor disposed on the upper surface of the magnetic sheet, wherein a circuit is added to the upper surface of the ferrite gyromagnet, and the circuit is connected to a microstrip filter; a ceramic sheet disposed on the upper surface of the circuit, and a samarium cobalt is added to the top of the ceramic sheet. This dual-section microstrip circulator, through the combined structure of the magnetic sheet, ferrite gyromagnet, circuit, microstrip filter, ceramic sheet, samarium cobalt, and resistor, can effectively improve isolation and meet the system's high isolation requirements; the microstrip filter connected to the circuit can improve the second harmonic characteristics, improving the problem of poor second harmonic characteristics in conventional microstrip circulators; the ferrite gyromagnet, as a gyromagnetic material, combined with the dual-section circuit design, helps to achieve low transmission loss characteristics; the overall structural design makes the circulator small in size and light in weight, and has high reliability.

The present application relates to the technical field of rare earth permanent magnet materials, and in particular to a method for improving the coercive force of samarium cobalt magnets by ultra-high pressure pre-aging treatment, comprising the following steps: placing metal raw materials in a vacuum induction furnace according to a ratio to obtain an ingot, and crushing the ingot to obtain an alloy powder; molding the alloy powder in a magnetic field, and obtaining a green body by cold isostatic pressing; sintering and solution treating the green body to obtain a samarium cobalt magnet in a solid solution state; performing a pre-aging treatment on the samarium cobalt magnet in a solid solution state by a six-sided top press; performing a first aging treatment and a second aging treatment on the sample after the pre-aging treatment in sequence to obtain a samarium cobalt magnet. The present application embodiment provides a method for improving the coercive force of samarium cobalt magnets by ultra-high pressure pre-aging treatment, which greatly improves the coercive force of samarium cobalt magnets by regulating the stress and microscopic defects in the samarium cobalt alloy, thereby affecting the formation of the samarium cobalt 1:5 cell wall phase during the later aging process.

The invention belongs to the technical field of magnetic complexes, and particularly relates to an ultrathin strong magnetic sheet, a preparation method thereof and application of the ultrathin strong magnetic sheet in eyelash ornaments. The ultrathin strong magnetic sheet comprises the following raw materials in parts by weight: 85-90 parts of magnetic powder, 5-10 parts of a composite binder and 2-6 parts of a coupling agent, the magnetic powder is selected from any one of ferrite magnetic powder, samarium iron nitrogen magnetic powder, samarium cobalt magnetic powder and neodymium iron boron magnetic powder. The ultrathin strong magnetic sheet provided by the invention can realize excellent magnetic induction intensity stability, damp heat resistance and salt fog resistance when the thickness is 0.1 mm, and has a good application prospect in eyelash ornaments.

The method comprises the steps that after samarium-cobalt permanent magnet powder and PrO2 powder are mixed, orientation forming, sintering, solid solution and aging treatment are carried out, PrO2 reacts with the samarium-cobalt permanent magnet at the high temperature, a (Sm, Pr) (Co, Fe, Cu and Zr) alloy matrix is formed, the saturation magnetization intensity of the matrix is improved, and the coercive force and the residual magnetism of the samarium-cobalt permanent magnet material are synchronously improved. Meanwhile, by means of the relatively low solid solubility of Cu in a (Sm, Pr) (Co, Fe, Cu and Zr) alloy matrix, part of Cu is driven to be separated out to a grain boundary area, grain boundary Cu-rich phases are formed in the grain boundary area of the alloy matrix and are evenly distributed in the grain boundary area in a nano-particle shape, the pinning strength of domain walls in the grain boundary area is improved, the coercive force is improved, and the magnetic field of the magnet is improved. Therefore, synchronous improvement of residual magnetism and coercive force of the samarium-cobalt permanent magnet material is ensured.

The invention provides a Joule heating aging treatment method for a samarium cobalt-based rare earth permanent magnet material, and relates to the technical field of rare earth permanent magnet materials. The Joule heating aging treatment method of the samarium-cobalt-based rare earth permanent magnet material comprises the steps of cast ingot preparation, crushing powder preparation, forming and solution treatment, Joule heating aging treatment and cooling treatment. According to the method, the samarium-cobalt permanent magnet material is rapidly processed by Joule heating strong pulse current, atom migration and agglomeration are inhibited, high-density vacancy defects and dislocations are reserved, cell wall phase nucleation is promoted, the heat preservation time is greatly shortened, and the efficiency is improved and the cost is reduced by several times. The prepared material is uniform and fine in nano cellular structure, the key magnetic performance reaches the commercial level or even better, the process is simple, the method is suitable for industrial production, and the good application prospect is achieved.

The invention belongs to the technical field of permanent magnet materials, and particularly relates to a method for improving the mechanical property of a samarium-cobalt magnet, which comprises the following steps of: 1, processing a sintered samarium-cobalt magnet subjected to sintering treatment into a required size, and carrying out solution treatment under the protection of inert gas to obtain a solid-solution samarium-cobalt magnet; and 2, carrying out rapid cooling treatment on the solid-solution-state samarium-cobalt magnet obtained in the step 1 under the protection of inert gas to obtain the samarium-cobalt magnet with improved mechanical properties. Compared with a traditional solid solution cooling process, the cooling speed is higher, the mechanical property is greatly improved, the bending strength of the cooled solid solution state magnet is larger than 140 MPa, and the bending strength of the aged state magnet is larger than 170 MPa.

The invention relates to a preparation method of a 2: 17 type samarium-cobalt permanent magnet, belongs to the technical field of metallurgical impurity removal, and solves the problems that rare earth samarium is greatly oxidized in the smelting and heat treatment process when the samarium-cobalt permanent magnet is prepared in the prior art, the oxidation loss of the rare earth samarium is large, and the performance of the magnet is not high due to oxide obstruction. A preparation method of a 2: 17 type samarium-cobalt permanent magnet comprises the steps that a vacuum induction furnace is adopted for smelting a metal raw material composed of multiple elementary substances, after the metal raw material is molten by 70%-100%, a strong reducing agent is added, and liquid alloy is obtained along with smelting of the metal raw material; the liquid alloy is subjected to pouring, powdering and profiling, and a permanent magnet blank is obtained; and performing micro-high-pressure sintering on the permanent magnet blank, and performing heat treatment to obtain the samarium-cobalt permanent magnet. And the preparation of the high-magnetic-performance samarium-cobalt permanent magnet is realized.

The present invention relates to a negative pressure positioning sintering tool for microwave boards and epoxy boards and a method for use. The tool includes an epoxy board sintering base, a limiting pressure block, and a magnetic suction head. The sintering part consists of two parts: a sintering base and a microwave board limiting pressure block. The magnetic joint serves as a vacuum interface and does not participate in high-temperature sintering. ① The sintering base consists of: a sintering pad, a tension spring, and a connecting rod; ② The microwave board limiting pressure block consists of a sintering pressure block, a sealing cover plate, a samarium cobalt magnetic ring, and a load rod; ③ The magnetic suction head consists of: a suction head, a sealing ring, and a samarium cobalt magnetic ring. The microwave board limiting pressure block effectively constrains the microwave board through vacuum negative pressure. When the microwave board limiting pressure block and the sintering base are assembled, the microwave board and the epoxy board can be accurately positioned. A pressure spring is used to ensure that when the solder is melted, the sintering pressure block can continuously apply effective fastening force to the printed circuit board and the metal shell. The sintering device is suitable for general hot stage sintering processes and reflow soldering sintering processes.

The present invention belongs to the technical field of rare earth permanent magnet materials and relates to a samarium cobalt permanent magnet and a preparation method thereof. While maintaining good magnetic properties, the present invention significantly improves the toughness and impact resistance of the samarium cobalt permanent magnet by adding only 0.5-2% of Cu. Homogenization of the cast sheet at 1000-1100°C improves grain size and component segregation, making it easier to crush during the subsequent pulverizing process, ensuring the consistency of the crushed powder and further guaranteeing the excellent magnetic properties of the final samarium cobalt permanent magnet.

A vertical sliding shaft located in the middle is arranged in a box body, transverse plates are arranged on the two sides of the sliding shaft respectively, the sliding shaft is connected with a longitudinal rotating plate in a sliding mode, the rotating plate is provided with a sliding hole for the sliding shaft to vertically penetrate through, containing grooves are formed in the two sides of the rotating plate respectively, and transparent plates are arranged on the front side and the rear side of each containing groove respectively. Fixing blocks are arranged at the positions, located above the transverse plate, of the two inner side walls of the box body respectively, pressing blocks are arranged above the fixing blocks, clamping columns vertically penetrating through the fixing blocks are arranged at the bottom ends of the pressing blocks, springs located on the two sides of the clamping columns respectively are arranged between the pressing blocks and the fixing blocks, and connecting blocks are arranged at the bottoms of the front side and the rear side of the rotating plate respectively. According to the utility model, the magnetic steel can be orderly placed in the material box through the placing grooves arranged at the two sides of the rotating plate, so that the management of the magnetic steel in the production process is facilitated, for example, the number and the position of the magnetic steel can be accurately known in the preparatory work before the sintering process, and the subsequent operation flow arrangement is facilitated.