STUDY ON ELECTRIC RESISTANCE WELDING ELECTRODE MADE WITH PM VACUUM HOT-PRESSED WC/Cu COMPOSITE
Zhao Naiqin, Department of Materials Science and Engineering,Tianjin University, 300072, Li Guojun, Wang Changju, et al
The manufacture of WC/Cu composite with the powder metallurgical method of hot-pressing has been investigated. The effects of WC composition on electroconductivity and hardness were examined. The results showed that the influence of WC composition upon electroconductivity of matrix obeyed the additive compound law. The relationships between WC composition and hardness could be expressed by a linear regression equation: HV WC/Cu =HV Cu +2.2V WC . This material has been used to make compound electrode which is comprised of a pure copper body and a WC/Cu composite tip. The compound electrode is of high hardness and electroconductivity, and its softening temperature has been greatly increased up to 800℃ because of existing WC particles.
【CateGory Index】： TF12