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Efeito dos elementos de liga Cr, Ni e Mo nos aços inoxidáveis da série 300 na cinética dos processos de nitretação a gás e nitretação a plasma
Simião, Mauricio (2021-05-24)
Escola de Engenharia Mackenzie (EE)
The effect of the chemical composition of austenitic stainless steels on the response to plasma and gas nitriding treatments was treatments were studied. The experimental techniques employed were metallographic analysis, microhardness tests, and measurements of the nitrogen content of the mass / volume nitrided. The work was carried out using commercial materials, with increasing levels of alloy elements, starting from the AISI 304L, 316L, 317 and up to 310 (superaustenitic) alloys. The results and discussions were organized for different levels of chromium, nickel and molybdenum, evaluating the effect of increasing levels for first two, and of molybdenum for nickel and “constant” chromium. The results indicate that the increase in the sum of chromium + nickel elements reduces the growth rate of nitride layer. Molybdenum alone also reduces the thickness of the “nitrided layer”.