Influencia do teor de titanio no torneamento do ferro fundido vermicular / Influence of the titanium content in the turning of compacted graphite iron

AUTOR(ES)
DATA DE PUBLICAÇÃO

2009

RESUMO

Due to its good mechanical properties, the compacted (vermicular) graphite iron (CGI) has found a lot of applications in the automobilistic field. One of the applications is the production of high power diesel engine blocks that, due to the higher strength compared to the usual gray cast iron, allows the increase of the pressure inside the cylinder and, consequently, production of high level of energy. The result is the better fuel burning what decreases the fuel consumption and the pollutants emission levels. However, good materials properties are obtained generally through improvements in the process of the production, for example, addition of alloy elements. Thus, the goal of this work is to study the influence of the titanium content, chemical element which improves the wear resistance of the cast iron, in the turning operation performance, with carbides and ceramics tools, using two cutting speeds. The results show that the alloy with the highest titanium content generated the shortest tool life and that ceramics tools are not suitable for turning of the vermicular alloys studied. Attrition, abrasion and diffusion were the main tool wear mechanisms verified in this work

ASSUNTO(S)

ceramica machining ferro fundido powder metallurgy mechanical wear cast-iron desgaste mecanico usinagem metalurgia do po ceramics

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