Study of the nitrided layer obtained by different nitriding methods

Abstract

In this study, plasma nitriding, gas nitriding and solid nitriding were performed in AISI H13, AISI P20 and N-8550 tool steels. The aim of the study was compare the acquired properties after the thermochemical treatments and evaluate the efficiency of the solid nitriding treatment. The samples were analyzed using a microhardness tester and a scanning electron microscope. The typical nitriding layers were observed -white layer and diffusion layer. The phases Fe 4 N -γ´ and Fe 2,3 N -ε were identified using an X-Ray diffractometer.The microhardness values of the nitrided layers obtained by the solid nitriding treatment were compatible with the other values of microhardness obtained by plasma and gas nitriding. The thickness of the nitrided layer obtained by the solid nitriding treatment was irregular.

Directions of development and application of plasma nitriding in industry

“…Za dubine iznad 0,6[mm], tvrdoća je ostajala na 355 HV. Sloj jedinjenja, takođe poznat kao beli sloj, sastoji se od mešavine nitrida železa Fe 4 N -γ' i/ili Fe 2,3 N -ε i može značajno poboljšati otpornost na habanje i koroziju [26,27]. Vrlo je tvrd i krt sloj koji ne difunduje dublje u čelik, već ostaje u neposrednoj blizini površine.…”

Characterization of Different Surface Layers Produced by Solid Boron-Nitro-Carburizing Thermochemical Treatment on AISI 1020

“…Among the diffusional treatments, the addition of carbon (carburizing) [6][7][8][9] , nitrogen (nitriding) [10][11][12][13] or boron (boronizing) 6,[14][15][16][17] to the steel surface, which can be performed by solid 11,12,[14][15][16][17] , liquid 6,7 , gas 11,13 and plasma techniques 11,18,19 improving wear and corrosion resistance of engineering components. Processes limitations and optimizations can be reached by the combination of different thermochemical treatments that can be performed progressively or simultaneously.…”