CONTROL OF THE PHASE-COMPOSITION AND NITROGEN-CONTENT IN THE NITRIDE LAYER IN THE NITRIDING OF STEEL 38KH2MYUA

It is known that in order to obtain a high-hardness, wear- and corrosi on-resistant article a nitrided layer of nitride epsilon(epsilon + gam ma')-phases should be formed on its surface. However, in some cases, f or example, in nitriding high-speed die steels and steel 38Kh2MYuA, th e formation of brittle nitride surface layers should be eliminated and only a zone of internal nitriding (alpha + gamma' + MN) should be for med in order to provide the requisite hardness and wear resistance. Th e article concerns preparation of nitrided layers with different compo sitions on the widely used 38Kh2MYuA nitralloy.