Moving Arc Static Arc Copper Tungsten Alloy Hv Electrical Switch Contact
Copper Tungsten alloys are used for high heat resistance, high electrical and/or thermal conductivity, and low thermal expansion are needed. Some of the applications are in electric resistance welding, as electrical contacts, and as heat sinks. As contact material the alloy is resistant to erosion by electric arc. WCu alloys are also used in electrodes for electrical discharge machining and electro-chemical machining.
EDM electrode
In view of tungsten steel, high temperature super-hard alloy die to be produced by corrosion, the common electrode wear big, slow, and the W-Cu electrical corrosion of high speed, low loss rate, precise electrode shape, excellent processing performance, to ensure the accuracy of processing pieces of greatly increased.
High-voltage electrode discharge tube
High-voltage vacuum discharge tube in the workplace, the contact material in a few seconds of time zero temperatures thousands of degrees Celsius, while the W-Cu anti-ablation properties, high toughness, good electrical conductivity, thermal conductivity performance to the discharge tube to provide the necessary stability conditions.
Electronic Packaging Materials
Both the low-expansion properties of tungsten, but also has high thermal conductivity properties of copper, its thermal expansion coefficient and thermal conductivity of conductive material can be adjusted to change the composition and thereby to the material provided to facilitate the use.
Tungsten Copper Specifications:
| Code No. |
Chemical Composition % |
Mechanical properties |
| CU |
Impurity≤ |
W |
Density
(g/cm3 )
≥ |
Hardness
HB
≥ |
RES
(μΩ·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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