COMPARAÇÃO ENTRE OS RESULTADOS DOS TESTES DE DUREZA APRESENTADOS PELAS ESCALAS ROCKWELL B E BRINELL EM ALUMÍNIO AERONÁUTICO

Abstract

The objective of this work is to present a study on the comparison of tests performed on the Rockwell B and Brinnel scales, aiming to demonstrate the variance that a low resolution equipment can cause in the hardness measurement process. Hardness is an important physical property of the material. It can be defined as the resistance of a solid to penetration from a point, and can be thought of as an indirect indication of a material's resistance to wear. The work will be carried out from a bibliographic reference followed by laboratory tests focused on the comparison of two meters. The work seeks to describe a method followed by a comparison using statistical models used in the industry to test the stability of measurements. The information necessary to carry out the study was obtained from research on hardness testing standards and published academic works, whereas the hardness values were obtained from a laser meter located at the university center of southern Minas and another meter located in an automobile company in Varginha-MG. From this work, it was possible to conclude that the objective was achieved in a very satisfactory way, as it was demonstrated from statistical analyzes that the resolution obtained by the equipment at the time of the test significantly affected the stability of the tests, generating results below the required in process quality standards.