METHOD OF IMPROVING LIFE OF CEMENTED CARBIDE TOOL FOR CUTTING

PROBLEM TO BE SOLVED: To provide a method of improving the life of a cemented-carbide tool which is made by means of dispersing particles of a hard material such as WC or TiC into a metal matrix of Co or the like. SOLUTION: This improving method is characterized by cryogenic treatment onto the cemen...

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1. Verfasser:	HAYAISHI MASAKAZU
Format:	Patent
Sprache:	eng
Schlagworte:	CASTING CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS ANDNON-FERROUS ALLOYS CHEMISTRY FERROUS OR NON-FERROUS ALLOYS MAKING METALLIC POWDER MANUFACTURE OF ARTICLES FROM METALLIC POWDER METALLURGY PERFORMING OPERATIONS POWDER METALLURGY TRANSPORTING TREATMENT OF ALLOYS OR NON-FERROUS METALS WORKING METALLIC POWDER
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a method of improving the life of a cemented-carbide tool which is made by means of dispersing particles of a hard material such as WC or TiC into a metal matrix of Co or the like. SOLUTION: This improving method is characterized by cryogenic treatment onto the cemented carbide tool, which means immersing the tool into liquid nitrogen for 1-10 hours to keep it at -196 deg.C of the boiling point of liquid nitrogen, and then bringing it back to a room temperature atmosphere. The low temperature tempering, which usually accompanies the cryogenic treatment, is not performed.