一、前言电触头是在电器中直接用于接通和分断电路的元件。目前世界各先进国家对触头材料的研究,主要集中在两个方面,一是提高触头材料的使用性能;一是节约贵金属。以CJ10系列接触器而言,过去使用纯银触头,体积大,耗银量大,且抗电磨损性能差。自七十年代起,国内就开始研究用于 CJ10系列接触器的触头材料,Ag—Fe_7触头材料就是其中的一种。经过长期使用证明,对于40安培以下的小容量接触器,采用 Ag—Fe_7 First, the preface Electrical contacts are used in electrical appliances directly connected to and breaking the circuit components. At present, the research of the contact materials in all the most advanced countries in the world mainly focuses on two aspects. One is to improve the serviceability of the contact materials; the other is to save precious metals. To CJ10 series contactor, the past use of silver contacts, bulky, silver consumption, and poor wear resistance. Since the seventies, the country began to study the contact material for the CJ10 series contactor, Ag-Fe_7 contact material is one of them. After long-term use proved that for the 40 amps below the small capacity contactor, the use of Ag-Fe_7