Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
Modification of Surface Properties of AISI M2 Steel by Plasma Nitriding Process Applied to Cutting Tool of Type End Mill
Submission Author:
Erbert Barbosa Leite , PI , Brazil
Co-Authors:
Erbert Barbosa Leite, Iverton José Farias da Silva
Presenter: Erbert Barbosa Leite
doi://10.26678/ABCM.COBEM2019.COB2019-0211
Abstract
Material engineering seeks economically viable improvements and technologies to improve material efficiency, one of the alternatives is plasma nitriding commonly used in metal components subject to wear in order to increase their useful life. In this way the objective of this work was to use plasma nitriding to increase the surface hardness of a cutting tool (end mill) made of AISI M2 steel, resulting in increased tool life and resistance to wear and fatigue. Thus, the samples of AISI M2 steel and the tools were subjected to the plasma nitriding process, using different temperature values (400 ºC, 450 ºC and 500 ºC) in atmospheres with 20% nitrogen and 80% hydrogen for a time set of four hours. The microhardness test verified that the hardness of the AISI M2 steel is 745 HV and the hardnesses obtained after the thermochemical treatment at the temperatures of 400, 450 and 500 ° C were 1470, 1418 and 1130 HV, respectively. Microscopy revealed that the largest diffusion zone occurred in the process at 500 ° C. When applied in a universal milling machine, the tool nitrided at 400 ° C showed the least wear at the cutting edges. Therefore, the best treatment for application in end mills made of AISI M2 is at 400 ° C.
Keywords
AISI M2 high-speed steel, Cutting Tools, plasma nitriding, Thermochemical treatments, End mill
