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Introduce(detail):

Code: Tungsten Copper

WCU Alloy Main applications: For the spark erosion of dies of cemented carbide and for making high speed steel and switches and contacts in high and low voltage electrical devices

Main Sizes:
Rods: Dia(10-60)mm x (150-250)mm
Spare bars: (12 x 12)mm (45 x 45)mm x 350mm

WCu 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. WCu alloy is easy to be machined. WCu alloy 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 WCu 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 WCu alloy sheet material, tubing, plate and other small products by mould pressing, extrusion pressing and MIM.

Applications of Copper Tungsten Composites WCu Alloy)
The manufacturing process of WCu alloy is to press the refractory (tungsten or tungsten carbide), sinter the pressed compact at a high temperature, and infiltrate with copper. All of this is done under very closely controlled conditions. The mechanical and physical properties of WCu alloy vary with composition. The thermal and electrical conductivity increase with the amount of copper, while the hardness, strength, and resistance to mechanical wear increase with the amount of tungsten or tungsten carbide. The application determines the material choice.
Resistance Welding
The high physical and mechanical properties, as well as the thermal and electrical conductivity, of refractory metal composites make WCu alloy very suitable for die inserts and electrode facings, flash and butt welding dies, and hot upsetting. They can also solve heat balance problems.
Heat Sinks
The CuW75 tungsten copper alloy is 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, WCu alloy works well in densely packed circuits.
Electrical Contacts
The CuW75 materials can be also used in oil-filled devices, air and gas circuit breakers, contactors, and high voltage switch gear. Some common applications are:
arcing contacts and plates
arc runners
current carrying members
blade facings
All of our Tungsten Copper alloys 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
WCu alloys 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.
 
Specifications of WCu Alloy:

Code No.

Chemical Composition %

Mechanical properties

CU

Impurity

W

Density

(g/cm3 )

 

Hardness

HB

RES( cm)

 

Conductivity

IACS/ %

 

TRS/ Mpa

CuW(50)

50+2.0

0.5

Balance

11.85

115

3.2

54

 

CuW(55)

45+

2.0

0.5

Balance

12.30

125

3.5

49

 

CuW(60)

40+2.0

0.5

Balance

12.75

140

3.7

47

 

CuW(65)

35+2.0

0.5

Balance

13.30

155

3.9

44

 

CuW(70)

30+2.0

0.5

Balance

13.80

175

4.1

42

790

CuW(75)

25+2.0

0.5

Balance

14.50

195

4.5

38

885

CuW(80)

20+2.0

0.5

Balance

15.15

220

5.0

34

980

CuW(85)

15+2.0

0.5

Balance

15.90

240

5.7

30

1080

CuW(90)

10+2.0

0.5

Balance

16.75

260

6.5

27

1160

 
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 Machining of Tungsten Copper Alloy
 Tungsten Copper Alloy Applications