Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Turning of hardened AISI 4340 steel using coated carbide tool
Submission Author:
Manoel Cleber de Sampaio Alves , SP , Brazil
Co-Authors:
José Miguel, Marcos Valério Ribeiro, José Vitor Candido de Souza, Marcel Kondo, Manoel Cleber de Sampaio Alves
Presenter: Manoel Cleber de Sampaio Alves
doi://10.26678/ABCM.COBEM2017.COB17-2679
Abstract
The elimination of the grinding process is the main objective of the machining of hardened steels, guaranteeing even greater productivity; Possibility of performing multiple operations in a single duty cycle; Low tooling cost; More affordable investments in CNC machine tools; Increased life to the fatigue of the part and small changes in its microstructure related to the hardness. However, the rapid reduction of the life of the tool impairs the machining of hardened steels. With the technological advances in carbide tools and in coatings these tools begin to become an option for the machining of hardened steels. A comparative study of the turning of hardened AISI 4340 steel (56HRc) was performed using Ti (C, N) + Al2O3 coated carbide metal tools by chemical vapor deposition (CVD) and CBN tools. Machining parameters were varied (cutting speed 150 and 200 m / min and feed rate 0.1 and 0.2 mm / rev), with a machining depth of 0.5 mm. The average roughness (Ra) and total roughness (Rt), tool flank wear (VB) and shear power were analyzed. The results were promising, with roughness results for Ti (C, N) + Al2O3 coated carbide tools, similar to roughness obtained in grinding processes (0.258um), with slightly greater flank wear than CBN tools.
Keywords
Cutting power, Roughness, tool wear, Ti (C, N), Al2O3
