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Tungsten copper alloy plate
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Tungsten copper alloy plate
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Table 1  Physical properties of metallic tungsten and copper

                                                     
 

performance

 
 

Density

 

g/cm3

 
 

Thermal

expansion

 

Coefficient

 

10-6/

 
 

Thermal

conductivity

 

w/(m·k)

 
 

Heat capacity

 

J/(kg·℃)

 
 

Elasticity

 

Modulus

 

GPa

 
 

Poisson density

 

 
 

Melting point

 

 
 

Strength

 

MPa

 
 

Tungsten

 
 

19. 32

 
 

4. 5

 

174

 

136

 
 

411

 
 

0. 28

 
 

3410

 
 

550

 
 

Copper

 
 

8. 93

 
 

16. 6

 
 

403

 
 

385

 
 

145

 
 

0. 34

 
 

1083

 
 

120

 

        Table2  Performance parameters of tungsten - copper alloy for electric alloy                                                                          

 

Name

 
 

Symbol

 
 

Copper

 
 

Silver

 
 

Impurities

 
 

Tungsten

 
 

Density

 
 

Resistance

 
 

Conductance

 
 

Hardness

 

HB

 
 

Bending

strength


 
 

Copper tungsten 50

 
 

CuW50

 
 

50±2

 

 

0.5

 
 

Margin

 
 

11.85

 
 

3.2

 
 

54

 
 

1128

 

 

Copper tungsten55

 
 

CuW55

 
 

45±2

 

 

0.5

 
 

Margin

 
 

12.30

 
 

3.5

 
 

49

 
 

1226

 

 

Copper tungsten60

 
 

CuW60

 
 

40±2

 

 

0.5

 
 

Margin

 
 

12.75

 
 

3.7

 
 

47

 
 

1373

 

 

Copper tungsten65

 
 

CuW65

 
 

35±2

 

 

0.5

 
 

Margin

 
 

13.30

 
 

3.9

 
 

44

 
 

1520

 

 

Copper tungsten70

 
 

CuW70

 
 

30±2

 

 

0.5

 
 

Margin

 
 

14.34

 
 

4.1

 
 

42

 
 

1716

 
 

790

 
 

Copper tungsten75

 
 

CuW75

 
 

25±2

 

 

0.5

 
 

Margin

 
 

14.50

 
 

4.5

 
 

38

 
 

1912

 
 

885

 
 

Copper tungsten80

 
 

CuW80

 
 

20±2

 

 

0.5

 
 

Margin

 
 

15.35

 
 

5.0

 
 

34

 
 

2158

 
 

980

 
 

Copper tungsten85

 
 

CuW85

 
 

15±2

 

 

0.5

 
 

Margin

 
 

15.90

 
 

5.7

 
 

30

 
 

2354

 
 

1080

 


1, High voltage switch with electrical alloy

Tungsten copper alloy in the high voltage switch 128kV SF6 circuit breaker WCu / CuCr, and high pressure vacuum load switch (12kV 40.5KV1000A), arrester is widely used, high pressure vacuum switch small size, easy to maintain, use a wide range, Burning and corrosive environments. The main performance requirements are resistance to arc ablation, anti-welding, cut-off current is small, less gas, low thermal emission capacity. In addition to conventional macro performance requirements, but also requires porosity, microstructure and performance, it is necessary to take a special process, vacuum degassing, vacuum infiltration and other complex processes.

2, Electric processing electrodes          EDM electrode early use of copper or graphite electrode, cheap but not resistant to ablation, and now basically has been replaced by tungsten copper electrode. Tungsten copper electrode has the advantage of high temperature, high temperature strength, arc erosion, and conductive thermal conductivity, heat fast. Applications are concentrated in EDM electrodes, resistance solder electrodes and high voltage discharge tube electrodes.

The electrode is characterized by a wide variety of specifications, small quantities and total volume. The tungsten and copper material used as an electroformed electrode should have as high a density as possible and uniformity of the tissue, especially elongated rod, tubular and shaped electrodes.