Properties of multicomponent layers produced on high speed steel by combined nitriding and PACVD methods under glow discharge conditions

A prospective line in the development of thermo-chemical treatments under g low discharge conditions is to work out new techniques of producing multico mponent layers such as e.g. combined plasma nitriding and PACVD technique w ith the use of organic compounds. These layers permit widening the applicat ion range of treated parts since they improve their useful properties. The paper specifies the conditions under which the composite layers elf the nitrided + Ti(NCO) type can be produced on high speed steel using a gaseou s atmosphere of the organic titanium compound Ti(OC3H7)(4) nitrogen and hyd rogen and discusses the influence of the carbon and oxygen contents in the Ti(NxCyOz) layer on its properties such as hardness and wear resistance. Th e composite layer!: of the nitrided + Ti(NCO) type have a good resistance t o frictional wear. The chemical composition of these layers can be controll ed. This new processes can be performed during a sole technological operati on in a conventional equipment designed for glow discharge assisted techniq ues.