Ceramic cutting tool material - comprising alumina with added rare earth metal or yttrium oxide, chromium and magnesium oxides (AT 15.6.82)

Ceramic cutting tool material - comprising alumina with added rare earth metal or yttrium oxide, chromium and magnesium oxides (AT 15.6.82)

Ceramic cutting material having a mean grain size of 1-2 micron consists of 0-20 (0.25-17) pref. 8-12% rare earth metal oxide or yttrium oxide; 0-20 (0.25-15) pref. 5-10% chromium oxide; 0-2 (0-2) pref. 0.25-0.75% magnesia, balance alumina. The material has increased durability on high speed cutting...

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Bibliographische Detailangaben
1. Verfasser: ALEXANDR ALEXEEVICH MAXIMOV, ALEXANDR IVANOVICH VLASOV, OLEG SERGEEVICH MALTSEV, LEONID PETROVICH MERKULOV, MSTISLAV NIKOLAEVICH PIVOVAROV ET GEORGY ROMANOVICH ZOLOTAREV
Format: Patent
Sprache:eng ; fre
Schlagworte:
ARTIFICIAL STONE
BORING
CEMENTS
CERAMICS
CHEMISTRY
COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS
CONCRETE
LIME, MAGNESIA
MACHINE TOOLS
METAL-WORKING NOT OTHERWISE PROVIDED FOR
METALLURGY
PERFORMING OPERATIONS
REFRACTORIES
SLAG
TRANSPORTING
TREATMENT OF NATURAL STONE
TURNING
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Beschreibung
Zusammenfassung:Ceramic cutting material having a mean grain size of 1-2 micron consists of 0-20 (0.25-17) pref. 8-12% rare earth metal oxide or yttrium oxide; 0-20 (0.25-15) pref. 5-10% chromium oxide; 0-2 (0-2) pref. 0.25-0.75% magnesia, balance alumina. The material has increased durability on high speed cutting, high mechanical strength and heat resistance. Specifically, it has a heat resistance at 250-500 deg.C 1.25-2.5 times higher than prior art ceramic cutting material and a cutting durability of 50-60 mins., i.e. 1.5-2 times higher than prior art. LA PRESENTE INVENTION SE RAPPORTE A UN MATERIAU CERAMIQUE NOUVEAU ET CONCERNE PLUS PRECISEMENT UN MATERIAU CERAMIQUE POUR LA FABRICATION D'OUTILS DE COUPE.ELLE EST CARACTERISEE EN CE QUE CE MATERIAU DE COUPE CERAMIQUE PRESENTE UNE DIMENSION DE GRAIN DE 1 A 2MICRONS ET UNE COMPOSITION PONDERALE DE:-OXYDE DE LANTHANIDE OU OXYDE D'YTTRIUM, 0,053 A 17,0;-OXYDE DE CHROME, 0,025 A 15,0;-OXYDE DE MAGNESIUM, 0,050 A 1,0;-OXYDE D'ALUMINIUM, Q.S.P. 100,0.L'INVENTION S'APPLIQUE A LA CONFECTION D'OUTILS DE COUPE.