METHOD FOR CURING FISSURES OR CRACKS IN WORKPIECES OF METAL OXIDE MATERIALS PROCESSED UNDER HIGH MATERIAL STRESS

摘要

1460502 Heat treating metal oxide workpieces LASAG SA 4 June 1974 24763/74 Addition to 1460501 Heading C1A Fissures and cracks in workpieces other than watch bearing jewels made of metal oxide materials processed under conditions leading to high material stress are cured by heating the workpieces in a furnace within a period of 4-16 hours to a temperature in the range of from 1000‹ to 1600‹ C., maintaining this temperature for a period of from 12 to 48 hours and subsequently cooling the workpieces in the furnace.