| 摘要 |
PROBLEM TO BE SOLVED: To improve the conducting and fusing properties of an Ag-WC based contact point material while maintaining its excellent cutting properties. SOLUTION: Provided is the contact point material for a vacuum valve using a green compact of Ag powder and WC powder as contact points by a sintering process, wherein an Ag member is placed on the green compact and sintered, thereby Ag infiltrates to form a first contact point layer 6a having the highest Ag content, a second contact point layer 6b having a next high Ag content and a third contact point layer 6c having the lowest Ag content which is predetermined, and the Ag content is increased as it goes to the contact face of the contact point 6. COPYRIGHT: (C)2010,JPO&INPIT |
