Process for the manufacture of a composite layer resistant both to jamming, to abrasion and corrosion and fatigue stresses alternating, and composite layer thus obtained

摘要

The invention relates to a composite layer capable of withstanding the four main modes of aging of the pieces. / p & & p & the workpiece or substrate 1, in a very different, is coated by a succession of unitary layers 2, 3, 4 to the number of at least three and compound each mainly by a combination between the metal m such as titanium ti, and a non metallic element m, such as nitrogen n. the compositions of two adjacent layers are different from one another by the value of the index x assigned to the non - metal in the chemical composition of the unitary layer. The three unitary layers form the composite layer 5. / p & & p & application: composite layer formed by the superposition of unitary layers of the composition and, alternately.