Original scientific paper

https://doi.org/10.17559/TV-20161013100743

Impact of cutting elements on forces and roughness of surface during turning hard steel X160 CrMo V12 with CBN tool

Sreten Savićević ; University of Montenegro, Faculty of Mechanical Engineering, Džordža Vašingtona bb, 81000 Podgorica, Montenegro
Milan Vukćević ; University of Montenegro, Faculty of Mechanical Engineering, Džordža Vašingtona bb, 81000 Podgorica, Montenegro
Sergey A. Klimenko ; V. Bakul Institute for Superhard Materials of the National, Academy of Sciences of Ukraine, Avtozavodskaya Str., 04074 Kiev, Ukraine
Ljubodrag Tanović ; University of Belgrade, Faculty of Mechanical Engineering, Kraljice Marije 16, 11120 Belgrade 35, Serbia

Abstract

The goal of these researches is related to the analyses of the impact of elements of cutting mode on the change of cutting forces, quality of a machined surface and change of physical and mechanical properties of a surface layer of a CBN tool for turning of X160 CrMo V12 steel having a hardness of 60 ± 2 HRC. The results of the analyses of tool surface wear indicate the presence of oxidation and changes of physical and mechanical properties in a tool surface layer. The evaluation clearly shows that a radial force (Fr) is dominant during the machining of this steel. The mathematical models of dependence of cutting force and a quality of machined surface were developed. It was ascertained that an oxidation of the tool surface, next to a contact zone tool-cutting chip, leads to the increase of their hardness and reduction of their strength, and it finally leads to the emergence of micro-wear of a cutting knife and rapid tool wear.

Keywords

CBN (corundum and boron-nitride); force; roughness; turning; wear

Hrčak ID:

185503

URI

https://hrcak.srce.hr/185503

Publication date:

31.7.2017.

Article data in other languages: croatian

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