Details

Tungsten copper




Key words:

Tungsten Copper alloy

90WCu sheet

tungsten switch contact Tungsten copper electrodes

Tungsten copper heat sinks

tungs

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Product Description


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