午夜影视

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      1. Customize Sintered Super Strong Ring SmCo Magnets

        • Price:

          Negotiable

        • minimum:

        • Total supply:

        • Delivery term:

          The date of payment from buyers deliver within days

        • seat:

          Fujian

        • Validity to:

          Long-term effective

        • Last update:

          2017-09-15 00:54

        • Browse the number:

          270

        Send an inquiries

        Company Profile

        Great Magtech (Xiamen) Electric Co., Ltd.

        By certification [File Integrity]

        Contact:Mr. Eason Hu(Mr.)  

        Email:

        Telephone:

        Phone:

        Area:Fujian

        Address:Fujian

        Website: http://greatmagtech.shh-dingchao.com/

        Product details

        No Matter you buy 1 pcs or 100,000 pcs of magnets, you can not find better service elsewhere.


        Samarium Cobalt magnets, also known as rare earth magnets, offer the best value when comparing performance and size in high temperature or adverse environments.

        Samarium Cobalt magnets are higher in cost, specially ring samarium cobalt ring magnet,?but magnetically very strong and typically allow for dimensional reductions with higher?precision.

        GME can supply Samarium Cobalt Magnets with custom shapes and sizes, made-to-order Samarium Cobalt Magnets, or we can assist in developing a solution specifically for your application.

        ?
        Specifications:
        Dimensions: D70xD60x20mm?smco magnets?with chamfer
        Tolerances: ±0.15 x ±0.15xmmx±0.15xmm
        Material: YXG-28H?smco magnets?
        Plating/coating: no coated
        Magnetization direction: thru thickness
        Maximum operating temperature: (350°C)
        Shape: Disc, Ring, Block, segment, Cylinder, Trapezoid, Customized design(Design proper magnets for clients specific requirements)
        Characteristics: High performance, low temperature coefficient, high working temperature 350 degree ,?
        It doesn't need to be coated because it is difficult to be eroded and oxidized.
        Application: Motors, Aviation and spaceflight, National defense and military affairs, Microwave appliance,?
        Medical apparatus, Auto industry, Machine gearings, sensors, meters and instruments.
        ?

        ?

        Samarium Cobatl magnets: good thermal stability, resistant to corrosion, resistant to demagnetization

        A samarium-cobalt (SmCo) magnet, a type of rare earth magnet, is a strong permanent magnet made of an alloy of samarium and cobalt.
        They are generally ranked similarly in strength to neodymium magnets, but have higher temperature ratings and higher coercivity.
        samarium-cobalt (SmCo) magnets are brittle, and prone to cracking and chipping. Samarium-cobalt magnets have maximum energy products (BHmax) that range from 16 megagauss-oersteds (MGOe) to 33 MGOe, approx. 128 kJ/m3 to 264 kJ/m3; their theoretical limit is 34 MGOe, about 272 kJ/m3.
        samarium-cobalt (SmCo) magnets are available in two "series", namely Series 1:5 and Series 2:17.
        Sintered Samarium Cobalt magnets exhibit magnetic anisotropy, meaning they can only be magnetized in the axis of their magnetic orientation. This is done by aligning the crystal structure of the material during the manufacturing process.
        ?
        Machining & Magnetization
        Samarium Cobalt magnets offer strong resistance to demagnetization. All Samarium Cobalt magnets cannot be formed with conventional drilling, turning or milling processes, and must be ground before they are magnetized. Additionally, large or complex assemblies are usually magnetized prior to assembly. Standard tolerances for Samarium Cobalt magnets are +/-.005 for ground dimensions.
        1:5 alloy material
        1:5 offers 16 MGOe (energy product) to 22 MGOe and is made up of approximately 50% samarium and 50% cobalt. The 1:5 series has a maximum recommended operating temperature of 250°C. SmCo 1:5 magnets require lower field strengths than 2:17 materials to magnetize. In some instances, 1:5 material may be magnetized with multiple poles, provided that a magnetizing fixture is available.
        2:17 alloy material
        2:17 offers 24 MGOe to 32 MGOe and is composed of about 25% samarium, 5% copper, 18% iron, 2% hafnium or zirconium, with the remainder being cobalt. The 2:17 series has a maximum operating temperature of 350°C. Special grades of 2:17 are available which can operate to even higher temperatures. SmCo 2:17 requires a higher magnetizing field than alloy 1:5 does, and multiple pole magnetization is sometimes possible, provided that a magnetizing fixture is available.
        Performance for samarium cobalt magnets:
        Material Grade Remannence Coercive Force Instrinsic Coercive Max Energy Density Temp
        Coefficient
        Temp
        Coefficient
        Cuire Temp Max Working Temp.
        (TW)
        (Br) (Hcj) (Hcb) (BHmax) (D) (Near Br) (Near Hcj) (TC)
        mT Gs KA/m Oe KA/n Oe KJ/m3 MGOe g/cm3 %/K %/K oC oC















        SmCo 1:5
        ?
        SmCo18 840 8400 605 7600 1432 18000 143 18 8.1 -0.04 -0.3 750 250
        (SmPr)CO5 SmCo20 890 8900 637 8000 1432 18000 159 20 8.2 -0.04 -0.3 750 250

        SmCo22 930 9300 637 8000 1432 18000 175 22 8.2 -0.04 -0.3 750 250

        LTc(HM-10) 590 630 493 6200 1430 1830 80 10 8.2 Temp Range %oC 700 250
        1:5









        20-100oC -0.004

        (SmGd)CO5









        100-200oC -0.021












        200-300oC -0.042


        ?
        SmCo24 980 9800 676 8500 1432 18000 191 24 8.3 -0.03 -0.2 800 280

        SmCo24H 980 9800 676 8500 1989 25000 191 24 8.3 -0.03 -0.2 800 280

        SmCo26L 1030 10300 398 5000 438 5500 207 26 8.3 -0.03 -0.2 800 300

        SmCo26 1030 10300 716 9000 1194 15000 207 26 8.3 -0.03 -0.2 800 300
        2:17 Sm2 SmCo26M 1030 10300 716 9000 1592 20000 207 26 8.3 -0.03 -0.2 800 300
        (CoFeCUZr)17 SmCo26H 1030 10300 716 9000 1989 25000 207 26 8.3 -0.03 -0.2 800 350

        SmCo28 1070 10700 756 9500 1194 15000 223 28 8.3 -0.03 -0.2 800 350

        SmCo28M 1070 10700 756 9500 1592 20000 223 28 8.3 -0.03 -0.2 800 350

        SmCo30 1100 11000 772 9700 1194 15000 239 30 8.3 -0.03 -0.2 800 350

        SmCo30M 1100 11000 772 9700 1592 20000 239 30 8.3 -0.03 -0.2 800 350

        LTc(HMG-22) 980 9800 715 9000 1500 20000 230 23 8.3 Temp Range %oC 840 300
        2:17









        -50-25oC 0.005

        (SmEr)2(CoTM)17









        20-100oC 0.012












        100-200oC 0.006












        200-300oC -0.025

        Features include:
        Samarium cobalt magnets are hard and brittle and may chip or break if dropped.
        They have high magnetic properties
        Samarium cobalt magnets offer good thermal stability
        Samarium cobalt magnets are resistant to corrosion
        Samarium cobalt magnets resistant to demagnetization
        ?

        Advantages:
        • Extremely resistant to demagnetization
        • high temperature stability (max operating temperatures between 250?°C (523?K) and 550?°C (823?K); Curie temperatures from 700?°C (973?K) to 800?°C (1,070?K)
        • Expensive and subject to price fluctuations (cobalt is market price sensitive)
        Disadvantages:
        • Samarium cobalt magnets can easily chip; eye protection must be worn when handling them.
        • Allowing magnets to snap together can cause the magnets to shatter, which can cause a potential hazard.
        • Samarium-cobalt is manufactured by a process called sintering, and as with all sintered materials, inherent cracks are very possible. These magnets do not have mechanical integrity; instead the magnet must be utilized for its magnetic functions and other mechanical systems must be designed to provide the mechanical reliability of the system.
        Comparison between neodymium and samarium cobalt
        Property Neodymium Sm-Co
        Remanence (T) 1-1.3 0.82-1.16
        Coercivity (MA/m) 0.875-1.99 0.493-1.59
        Relative permeability 1.05 1.05
        Temperature coefficient of remanence (%/K) 0.12 0.03
        Temperature coefficient of coercivity (%/K) 0.55..-0.65 0.15..-0.30
        Curie temperature (°C) 320 800
        Density (g/cm3) 7.3-7.5 8.2-8.4
        CTE, magnetizing direction (1/K) 5.2×106 5.2×106
        CTE, normal to magnetizing direction (1/K) 0.8×106 11×106
        Flexural strength (N/mm2) 250 150
        Compressive strength (N/mm2) 1100 800
        Tensile strength (N/mm2) 75 35
        Vickers hardness (HV) 550-650 500-650
        Electrical resistivity (Ω·cm) (110-170)×106 86×106
        ?
        Manufacturing Methods
        SmCo magnets are manufactured in the following forms:
        ?Sintered - fine SmCo powder is compacted in a die and then sintered, fusing the powder into a solid material. There are two forms of pressing: die pressing (which involves a hard die into which the powder is placed and then pressed), and isostatic pressing (involving a special "rubber" die into which powder is placed and then pressed with equal force in all directions on the powder). Die pressed parts are smaller than isostatically pressed parts. Although the magnetic properties of isostatically pressed parts are higher, the uniformity of magnetic characteristics is usually lower than that of die pressed parts. Sintered parts usually need some finish machining in order to meet final tolerances.
        • Compression Bonded - this is a technique whereby a special form of SmCo powder is blended with a plastic carrier material, die pressed and then heated. Parts made in this way can be of complex shapes and come off the tool with close tolerances, requiring no further finish machining. They have lower energy products than sintered materials - currently in the range of 15 MGOe.
        GME core values

        Customer Care
        Quality is our life. Customer satisfaction is our eternal pursuit. Everything we do at GME is driven by an unyielding passion for excellence in identifying and delivering solutions that exceed expectations.

        Innovation
        In today's fast-developing global economy, innovation is critical to a company's survival. We anticipate and adapt to changing for continuous improvement.

        Co-Prosperity
        A business cannot be successful unless it creates prosperity and opportunity for others. We have a dream--customers could win more through our Great Service; we have a dream--GME members could realize their own dreams while striving for GME Dream.

        Social Responsibility
        Sustainability isn't only important for people and the planet, but also is vital for business success. We are environmentally responsible and drive to sustainability. And we should do something for our better future.

        For more information, please refer to www.greatmagtech.com
        午夜影视
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