Silver-saving silver tungsten carbide graphite electrical contact material for high-performance low-voltage circuit breaker

• Main Authors: ZHANG XIUFANG, BAI XIAOPING, LU XIANGFEN, WENG WEI, LIN WANHUAN
• Format: Patent
• Language: Chinese; English
• Published: 30.01.2013
• Subjects: ALLOYS; BASIC ELECTRIC ELEMENTS; CHEMISTRY; ELECTRIC SWITCHES; ELECTRICITY; EMERGENCY PROTECTIVE DEVICES; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; RELAYS; SELECTORS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention discloses a silver-saving silver tungsten carbide graphite electrical contact material for a high-performance low-voltage circuit breaker, which comprises the following components by weight percent: 9-16wt% of tungsten carbide, 2-9wt% of vanadium carbide and 1-4wt% of graphite, additive elements and the balance of silver, wherein the additive elements are selected from one or more of the following elements: 0-0.4wt% of Ni-P, 0.1-0.9wt% of Si, 0.3-1wt% of Co and 0.1-0.3wt% of Ni, and the Ni content in the Ni-P is 76-85wt%. An electrical contact provided by the invention has better arc burning loss resisting capability, shows higher electrical endurance and is low in manufacturing cost, and the components and performances are optimized and matched.