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        • Product Name  Tungsten copper
        • Views   2886

        Tungsten Copper :
          Tungsten-Copper alloy is the composite of Tungsten and Copper, which own the excellent performances of Tungsten and Copper, such as heat-resistant, ablate-resistant, high-intensity, excellent thermal and electrical conductivity. It is easy to be machined. It is used widely in such industries as engine, electrical power, electron, metallurgy, spaceflight and aviation. Using CIP formation, sintered tungsten skeleton and infiltrating copper (silver) technology, large size and special shape products of tungsten-copper (silver) composites with 6-90 percent of copper are produced, such as electric contacts, electrode, refractory parts, heat sinks and parts of rocket, We can also produce sheet material, tubing, plate and other small products by mould pressing, extrusion pressing and MIM.


        Main Specifications of W-Cu Composite

        Type

        Density g/cm3

        Conductivity %IACS

        HB MPa

        Size mm

        WCu50

        11.9~12.3

        ≥55

        1130~1180

        Tube: Ø3~390
        Length<500
        Sheet:
        Width<390
        Length<500
        Special type:
        Width<390
        Length<500

        WCu40

        12.8~13.0

        ≥47

        ≥1375

        WCu30

        13.8~14.4

        ≥42

        ≥1720

        WCu20

        15.2~15.6

        ≥34

        ≥2160

        WCu10

        16.8~17.2

        ≥27

        ≥2550

        WCu7

        17.3~17.8

        ≥26

        ≥2900

         

         


        90WCu sheet


        Tungsten copper electrodes               Tungsten copper heat sinks


        Resistance Welding
          The high physical and mechanical properties, as well as the thermal and electrical conductivity, of refractory metal composites make these materials very suitable for die inserts and electrode facings, flash and butt welding dies, and hot upsetting. They can also solve heat balance problems.

        Content Density g/cm³ Hardness HRB Conductivity %IACS Class RWMA
        W50Cu50 ≥11.9 ≥65 ≥54    
        W55Cu45 ≥12.5 ≥70 ≥49 10 10.7445
        W70Cu30 ≥14.1 ≥82 ≥42    
        W75Cu25 ≥14.5 ≥90 ≥38 11 11.744
        W80Cu20 ≥15.2 ≥100 ≥34 12 12.7435
        W85Cu15 ≥15.9 ≥240HB ≥30    
        W90Cu10 ≥16.75 ≥260HB ≥27    

         

        Heat Sinks
          JBNR developed CuW75 to be used extensively in thermal mounting plates, chip carriers, flanges, and frames for high-power electronic devices. As a copper tungsten material, it’s a composite, so both the thermal advantages of copper and the very low expansion characteristics of tungsten can be utilized.
        The combination of these two materials results in thermal expansion characteristics similar to those of silicone carbide, aluminum oxide, and beryllium oxide, used as chips and substrates. Because of its thermal conductivity and expansion characteristics, it works well in densely packed circuits.

         
        Typical proprerties Heat Sink of W-Cu

        Material Composition W-10Cu W-15Cu W-20Cu W-25Cu W-30Cu
        Density (g/cm3) 17.1 16.4 15.5 14.8 14.2
        TC (W/m·K) 191 198 221 235 247
        CTE (×10-6/K) 6.3 7.1 7.6 8.5 9.0

         

        Electrical Contacts

            JBNR developed CuW70,CuW80 contacts with applications as following:
          ·arcing contacts and plates
          ·arc runners
          ·current carrying members
          ·blade facings
          All of our materials are produced by the press, sinter, and infiltrate process. Each manufacturing step, including the basic powder, is closely controlled, monitored, and signed off on by Quality Assurance. After completion, all manufactured lots are checked for conductivity, density, and hardness prior to shipping. This information is recorded and kept on file, and also accompanies the parts or materials when requested.

         
        EDM and ECM
          tungsten composites are used worldwide for EDM (Electrical Discharge Machining) and ECM (Electrochemical Machining) electrodes. All material is manufactured by the press, sinter, and infiltrate process. Virgin powders are used, resulting in a consistent homogeneous material giving high and even burning rates. Copper tungsten is used in plunger/sinker applications where intricate definition is required, especially in tungsten carbide.

         
        Dimensions
          Balls: φ 1.5mm -φ 100mm
          Shafts: (φ1mm above)×(Length max.600mm)
          Sheets: (Thickness 0.15mm above)×(Wideness max.200mm)×(Length max.500mm)
          Square, round and rectangle sizes: diameter 550mm above
          According the demanding 

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