Tray for coating cutting tool inserts using chemical vapor deposition or moderate temperature chemical vapor deposition, has insert contacting face with coating comprising oxide inner layer and wear resistant outer layer

摘要

The tray face on which the inserts are positioned has a coating comprising a spray coated oxide inner layer and a wear resistant outer layer of a carbide, nitride and/or oxide of a Group 4b, 5b or 6b metal or aluminium. A graphite or ceramic tray for coating cutting tool inserts with a wear resistant coating using a CVD (Chemical Vapour Deposition) and/or MTCVD (Moderate Temperature Chemical Vapour Deposition) method in which the inserts are positioned on the tray has a face intended for contact with the inserts which has a coating comprising a spray coated oxide inner layer and a wear resistant outer layer of a carbide and/or nitride and/or oxide of at least one metal chosen from Group 4b, 5b, 6b and aluminium.