Patent ID: 6182533
Filing Date: 2001-02-06
Classification: B22F,B23B,B23P,E21B,Y10S,Y10T

Abstract:
A method of making a drill blank, said method comprising the steps of:(i) providing a cemented carbide body having a recess formed in a surface thereof, wherein said recess has a shape and a cross-sectional size;(ii) placing a layer of ultra-hard abrasive on a surface of said recess;(iii) inserting a cemented carbide piece into said recess, said cemented carbide piece having a shape and a cross-sectional size approximately equal to said shape and said cross-sectional size of said recess;(iv) subjecting said cemented carbide body to conditions of elevated temperature and pressure such that said layer of said ultra-hard abrasive is bonded to said cemented carbide body; and(v) severing said cemented carbide body through said layer of said ultra-hard abrasive to produce at least one drill blank.