Estudo da usinabilidade do ferro fundido cinzento a partir da variação de temperatura: uma avaliação com base no teste de propriedades físicas

Abstract

The machinability is the ability of a material must be machined, several factors interfere in this performance: tool material, cutting tool and process / machine. Among all these factors, there are sub-factors to be examined separately, as the temperature in the machining process. This paper aims to demonstrate, through testing physical properties, developed by Henkin, the interference of temperature variation in gray cast iron. Tests were conducted with three types of gray cast iron (FC 150, FC 200 and FC 250), and the results were given in machinability speed, this criterion used to measure the machinability index of the material. It was mounted on a database with all found certain properties and units, and used at a data processing program, in which tables were created with the obtained results and graphs which show the behavior of materials in certain temperature. The results showed that the hardness has a greater influence on machinability speed due to the variable with the largest oscillation. It was also noted that the FC 150 stood out as the material with higher machinability index, which could be explained through its superior thermal conductivity and hardness which is the lowest among the materials