Development of sintering process hard metals to wear resistant efficiency on sustainable material management

Abstract

This study aims to development of production process of hard metal by tungsten carbide powder with the particle sized of 0.1 - 0.35 µm. This carbide powder were made of recycling cemented carbide tool scraps, so it is mixed with Ta = 2.82 % , Mo = 0.45 % , Nb = 1.22 % , Ti = 4.56 % , Zr = 0.37 % The shape of the carbide powder are roughly round due to ball milling for 300 hours. It was mixing cobalt 10 % and Paraffin wax 2 %, which is found the work piece that running through the process of sintering with a temperature of 1,400 °c and 1,430 °c , have the hardness of 1,368.5 and 1,346.3 HV, respectively. In one hour of holding time process, the work piece with 1,430 °c of the sintering causes less wear. After the test of turning operation, it can be concluded that the tungsten carbide cutting tool provides the equivalent quality as a standard cutting tool.