PRE-ALLOYED POWDER AND ITS USE IN THE MANUFACTURE OF DIAMOND TOOLS

摘要

The powder has an average particle size of less than 8 µm and a loss ofmass by reduction in hydrogen of less than 3 % and itcontains 10 - 80 % Fe, up to 40 % Co, up to 60 % Ni and up to 15 % M, M beingpresent, at least partially, in the oxidized state andrepresenting one or more of the elements Mn, Cr, V, Al, Mo and Ti, the balancebeing unavoidable impurities. This powder may be sinteredat 650 - 1000 °C to give a matrix having a high hardness.