| 摘要 |
THE INVENTION PROVIDES A DIAMOND COATED TOOL HAVING AN EXCELLENT CUTTING PERFORMANCES, WEAR RESISTANCE, ADHESION RESISTANCE AND WORK SURFACE ROUGHNESS IN COMBINATION AND A METHOD OF PRODUCING SUCH A TOOL.A DIAMOND COATED TOOL COMPRISING A SUBSTRATE AND A DIAMOND COATING FORMED ON THE SURFACE OF THE SUBSTRATE, WHEREIN SAID SUBSTRATE IS MADE OF A CEMENTED CARBIDE OR A CERMET, DIAMOND GRAINS CONSTITUTING A GROWTH SURFACE OF SAID DIAMOND COATING HAS AN AVERAGE GRAIN SIZE OF ABOUT 1.5 MICROMETERS OR BELOW, SAID DIAMOND COATING HAS A THICKNESS RANGING FROM ABOUT 0.1 MICROMETER TO 20 MICROMETERS, AND SAID DIAMOND COATING HAS AN AVERAGE SURFACE ROUGHNESS RA RANGING FROM ABOUT 0.01 MICROMETER TO 0.2 MICROMETER. SUCH A DIAMOND COATED TOOL CAN BE OBTAINED BY CARBURIZING THE SUBSTRATE CONSISTING OF A CEMENTED CARBIDE OR A CERMET, AND GROOWING UP A DIAMOND COATING THEREON. |
