高抗熔焊性CuCrTe触头的断裂机理研究

Study on Fracture Mechanism of CuCrTe Contact with High Anti-welding Ability

铜铬触头是中压真空灭弧室的核心器件,其质量直接影响着电网的可靠性,而抗熔焊一直是铜铬触头的一个重要性能要求。混粉法制备的触头抗熔焊性好,但是开断性能不足,熔铸法制备的触头开断性具有优势,但是抗熔焊性不如混粉触头。为了解决熔焊问题,同时又保证优异的开断性能,在熔铸工艺的基础上,通过添加第三元素金属Te制备CuCrTe触头能够有效降低材料的抗拉强度,并且已经得到成功应用。本文针对熔铸法制备的CuCrTe触头的断裂机理及相关特性进行了研究分析。

Copper-chromium contacts are the core components of vacuum interrupters,and their quality directly affects the reliability of the power grid.Anti-welding has always been an important performance requirement for copper-chromium contacts.The contact prepared by the mixed powder method has good anti-welding ability,but the breaking performance is insufficient.The contact prepared by vacuum induction melting method has an advantage in breaking,but the anti-welding ability is not as good as the mixed powder contact.In order to solve the problem of welding and ensure excellent breaking performance,on the basis of the vacuum induction melting process,the preparation of CuCrTe contacts by adding the third element metal Te can effectively reduce the tensile strength of the material,and has been successfully applied.In this paper,the fracture mechanism and related characteristics of CuCrTe contacts prepared by vacuum induction melting are studied.