(中国科学院 金属研究所， 沈阳材料科学国家(联合)实验室， 沈阳 110016)
摘 要: 综述了大功率真空开关铜铬触头材料最近的进展。主要内容包括：铜铬合金的发明及技术上的优点，铜铬合金二元相图上的特点及常规铸造工艺上的困难；铜铬合金的主要制备工艺包括粉末烧结法、粉末烧结熔渗法以及自耗电极法等，铜铬合金中杂质的影响，包括残余气体的影响、残余碳的影响及第三组元的影响等。对铜铬合金及其材料的显微组织对真空电触头的基本电性能(分断电流能力，抗电弧烧蚀能力，截断电流等)的影响进行了简要的概述，最后对铜铬合金进一步发展方向(如铬粒子细化， 材料回收及准快速凝固工艺，喷射成型等)进行了简要的讨论。
关键字: 铜合金； 触头材料； 制备工艺； 电性能
high power vacuum interrupters
（Shenyang National Laboratory for Materials Science， Institute of Metal Research，
Chinese Academy of Sciences， Shenyang 110016， P.R.China）
Abstract:The recent development of Cu-Cr contact materials for high power vacuum interrupters is concluded. It includes the origination of Cu-Cr alloy and technical advantages；the characteristic of Cu-Cr binary diagram and the difficulties in convenient casting process；the main preparation processes of Cu-Cr alloy，such as powder sinter， sinter and vacuum infiltrate and arc melting process；the influence of impurities，such as residual gases， residual carbon and the third element in Cu-Cr alloy，on the properties of Cu-Cr alloy etc. Also，it summarizes the effect of Cu-Cr alloy and its microstructure on the basic electrical properties of the vacuum contactor (such as circuit interruption ability，resistance to erosion by arc，current chop etc.). Finally，the developing direction of the Cu-Cr contact materials in the future (Cr particle dispersion，alloy recycle and qui-fast solidification process，and spray forming etc.) are also discussed.
Key words: copper alloy; contact materials; process; electrical properties
