Banca de DEFESA: CAIO CÉSAR GONÇALVES COUTINHO BARROSO

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : CAIO CÉSAR GONÇALVES COUTINHO BARROSO
DATE: 29/11/2023
TIME: 08:00
LOCAL: Plataforma Microsoft Teams
TITLE:

EVALUATION OF THE MACHINES' ABILITY OF A STEEL WITH BAINITIC MICROSTRUCTURE IN TURNING WITH CARBINE AND CERAMIC TOOLS

KEY WORDS:

Turning. Bainite. Roughness. Wear

PAGES: 100
BIG AREA: Engenharias
AREA: Engenharia Mecânica
SUMMARY:

Cast steels with high percentages of C and Si are alloys widely used in the manufacture of parts in the automotive and railway sectors, and analyzes on the machinability of this type of material are scarce in the literature. These alloys combine excellent mechanical properties such as wear resistance, traction and tenacity due to their microstructure predominantly composed of bainite, ferrite and retained austenite. To carry out this research, the material was melted, chemical composition analysis, optical microscopy, scanning electron microscopy and tensile testing were carried out. The machinability was analyzed in the dry turning operation with ceramic and carbide tools, with constant feed and cutting depth varying the cutting speed. Surface roughness and wear mechanisms were analyzed, and it was possible to observe that an increase in cutting speed led to greater tool wear due to abrasion, adhesion and diffusion mechanisms.

COMMITTEE MEMBERS:
Interno - ANDRE GUIMARAES FERREIRA
Presidente - SANDRO CARDOSO SANTOS
Externo ao Programa - SANDRO DA COSTA SILVA