Patent ID: 7988832

Claim:
PVD process for depositing at least one (Al y Cr 1-y )X film on a work piece, where X=N, C, B, CN, BN, CBM, NO, CO, BO, CNO, BNO, CBNO and 0.415≦y≦0.695, comprising the steps of installing at least one work piece in a vacuum coating system with at least one Al z Cr 1-z target, where 0.25≦z<0.75, operating said system at a pressure of 0.5 to 8 Pa with the addition of a nitrogen-, carbon-boron- or oxygen-containing reactive gas and applying on the work piece of a substrate voltage of between −3 and −150V, as an arc of sputtering source, wherein the constituent composition within the said at least one (Al y Cr 1-y )X film is either essentially constant or varies either continuously or in steps over the thickness of the film, said at least one (Al y Cr 1-y )X film having a cubic crystal structure and a rate of wear less than or equal to 1.5×10 −15 m 3 m −1 n −1 , said work piece being selected from among the following tools: a milling tool, a hob, (spherical-head) ball nose mill, planar or profiling cutter, a clearing tool, reamer, (indexable tip) insert for turning and milling, a die, an injection mold or a machine component.