Caracterização mecânica de amostras de produtos da indústria siderúrgica para verificação de suas especificações

Abstract

The steel industry has greatly increased as a result of the development of civil construction in recent years in Brazil. And with the huge demand of steel products such as rebar for reinforced concrete, and the growing competition in the provision of such a product, increasingly it is necessary to a good quality product that attend to the requirements of that market. Thus, this study shows the mechanical characteristics of samples of three rods manufacturers, A, B and C, in order to see how these products behave before the tensile test and microhardness test, so that the from the diagnoses could be assessed which product has better mechanical properties for civil construction. To do so, was chosen from each manufacturer of rebar samples of SAE 1024 CA-50 8 mm. These samples were machined to the tensile test and embedded, ground and polished to microhardness testing. With the test results, to set up graphs and tables that served as a comparative tool for products from three manufacturers. Both the hardness and tensile in the manufacturer's product C showed better performance than the other two. Also in the tensile test, the manufacturer's product B was the only one who showed values lower than those prescribed in the NBR 7480.