Factors on Tungsten Copper Contacts - Structure Size and Manufacturing Processes

Factors on tungsten copper contacts can be seen from the following main points:

1. The structure size. In theory, if the structure size of tungsten copper contacts is larger, then its anti-arc ablation performance will be stronger, because its use of energy more dispersed. In actual use, because the limit size of electrical switch structure, its size can not do much. In recent years, someone has developed plug-in contacts, hollow contacts, not only accelerates the speed of heat dissipation of contact materials, but contacts can still maintain good contact state after the ablation.

2. The manufacturing processes. Now manufactures in China are commonly applying infiltration method (mixing powder, pressing, sintering) to prepare tungsten copper contacts. What is different is that whether there is the use of sintering tungsten skeleton infiltration process. Compared with the performance of tungsten copper contacts, the ones used the process for the preparation is more ideal than the other ones without using it. In recent years, foreign countries have adopted more advanced preparation technology to improve the life of the contacts, such as, arc melting, sintering rolling process, fiber-reinforced method and so on, but China for the use of these new processes are still in the laboratory stage.

 

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