JP2908071B

A contact material for vacuum circuit breakers with improved weld resistance and voltage sustaining property comprises an alloy composition including a copper component, a chromium component and a bismuth component. The composition has metallographic structure comprising a first phase including the...

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Bibliographische Detailangaben
Hauptverfasser:	SEKI KEISEI, OKUTOMI ISAO, YAMAMOTO ATSUSHI, OOKAWA MIKIO, OTOBE KYOBUMI
Format:	Patent
Sprache:	eng
Schlagworte:	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
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Beschreibung
Zusammenfassung:	A contact material for vacuum circuit breakers with improved weld resistance and voltage sustaining property comprises an alloy composition including a copper component, a chromium component and a bismuth component. The composition has metallographic structure comprising a first phase including the copper component and the bismuth component and a second phase including the chromium component and interposed among the first phase so as to have a boundary surface between the first phase and the second phase. The boundary surface appears in a structural cross section of the alloy composition as a substantially smooth boundary line.