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Silicon nitride positioning pin

  • Finished product characteristics

    ● Extremely high hardness ● High thermal shock resistance ● Electrical insulation ● High temperature resistance ● High tensile strength ● Compression strength ● Self lubrication

  • Product characteristics

    Using air pressure sintering to manufacture positioning pins of different shapes. In the field of welding positioning pins, silicon nitride positioning pins reduce cold welding spatter. At a high temperature of 800 degrees Celsius, there is no current passing through during welding, which will not cause wear. The precise matching and positioning of the welding plate and welding nut in projection welding are no difference, and the effect is superior to other materials.

  • precision machining

    1. Self developed and self prepared silicon nitride powder

    2. Dry pressing and isostatic pressing forming

    3. Gas pressure sintering

    4. Precision machining: flat grinding, outer diameter/inner diameter grinding, precision machining, grinding, polishing and grinding

    5. Strict testing

  • application area

    Aerospace, military, nuclear energy, machinery, metallurgy, molds, petrochemicals, automation equipment, large machinery shaft sleeves, high-strength accessories, automotive and new research fields.

    • Name/Characteristics alumina Zirconia silicon nitride Aluminum nitride silicon carbide boron nitride
    appearance White or milky white or ivory ivory dark gray brown black white
    density 3.9 6.05 3.2 3.3 3.15 2.3
    permittivity 10 30 11 8 9.6 3.1
    Thermal conductivity W/mk 20~37 5-8 90-130 90~230 25-40 33
    Thermal expansion coefficient(Negative sixth power of ten/K) 4.5~8
    (Negative sixth power of ten/K)    		 8~11.5
    (Negative sixth power of ten/K)    		 3.2
    (Negative sixth power of ten/K)    		 4.5
    (Negative sixth power of ten/K)    		 4.8-5.2
    (Negative sixth power of ten/K)    		 15
    (Negative sixth power of ten/K)
    Elastic modulus(Gpa) 380 210 300~320 320 400~420 *
    Poisson's ratio 0.27 0.3 0.26 0.25 0.19 *
    High temperature resistance 500°~1700° 500°~1700° 800°~1300° 1700° 1700° 2200°
    Acid and alkali corrosion resistance strong strong strong strong strong same as
    magnetism not have not have not have not have not have not have
    dimensional stability Little change with temperature Little change with temperature Little change with temperature Little change with temperature Little change with temperature Little change with temperature
    thermal shock resistance△T.℃ 200 400 800 400 600 *
    Operating centrifugal force medium more small small small small
    Customized process
    • 1

      By product

      Application requirement

    • 2

      Design and research

      Optimization scheme

    • 3

      Strict essence

      Precision drawing

    • 4

      piggyback

      Select ingredients

    • 5

      Multiple forming

      Fired blank

    • 6

      Grinding and polishing

      Precision machining

    • 7

      Multiple gage

      Professional survey

    • 8

      Qualified product

      Package and ship

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