METHOD OF MAKING A CBN MATERIAL

摘要

The present invention relates to a method of making a cBN material comprising the steps of: -providing a powder mixture comprising cBN grains, aluminum and a Ti(CxNyOz)a powder, -subjecting the powder mixture to a milling to form a powder blend, -subjecting the powder blend to a forming operation to form a green body, - subjecting said green body to a pre-sintering step, at a temperature between 650 to 950°C, to form a pre-sintered body, - subjecting said pre-sintered body to a HPHT operation to form the cBN material; where the Ti(CxNyOz)a powder is stoichiometric so that 0.05