Iron-based sintered alloy valve seat and method for manufacturing same

Provided is an iron-based sintered alloy valve seat having excellent radial compressive strength. The functional member-side layer and the support member-side layer are integrally sintered to form a sintered body having a double-layer structure. The mixed powder for the functional member side layer...

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Bibliographische Detailangaben
Hauptverfasser:	TAKAGI SEISUKE, IKEMI SATOSHI
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	ACTUATING-FLOATS ALLOYS BLASTING CASTING CHEMISTRY COCKS DEVICES FOR VENTING OR AERATING ENGINEERING ELEMENTS AND UNITS FERROUS OR NON-FERROUS ALLOYS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING LIGHTING MAKING METALLIC POWDER MANUFACTURE OF ARTICLES FROM METALLIC POWDER MECHANICAL ENGINEERING METALLURGY PERFORMING OPERATIONS POWDER METALLURGY TAPS THERMAL INSULATION IN GENERAL TRANSPORTING TREATMENT OF ALLOYS OR NON-FERROUS METALS VALVES WEAPONS WORKING METALLIC POWDER
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Beschreibung
Zusammenfassung:	Provided is an iron-based sintered alloy valve seat having excellent radial compressive strength. The functional member-side layer and the support member-side layer are integrally sintered to form a sintered body having a double-layer structure. The mixed powder for the functional member side layer and the mixed powder for the support member side layer are sequentially filled in a mold, press working is performed to form a powder compact, and the powder compact is sintered to form the iron-based sintered alloy valve seat having a double-layer structure. In the mixed powder for the functional member-side layer, an iron-based powder having a hardness of 170-220 HV is used as an iron-based powder for forming a matrix phase, the matrix phase is formed in the form of a fine carbide precipitated phase, and 20-40% by area ratio of Si-Cr-Mo Co-based intermetallic compound particle powder or Si-Cr-Mo-Ni Co-based intermetallic compound particles are dispersed in the matrix phase. And 0-5% of solid lubricant particles a