Estudo da recristalização do cobre em liga comercialmente pura

Abstract

Copper and its alloys have a set of mechanical, electrical and chemical properties, which are of high relevance for industry and technology progress. Therefore, the study of its behavior at the microstructural level and influence of parameters associated with its mechanical conformation are necessary in order to control and determine values that allowed the efficiency in the production and application of this metal, diminished possible exaggerations of process or limited scope of its properties. In this work, the impact of the degree of deformation imposed during the rolling in the recrystallization of the copper was studied, and the consequence of the variation of the exposure of the metal in the furnace was evaluated and finally the qualitative analysis of the resulting grain size in the process and its impact on the hardness. Thus, it was possible to conclude that the higher the degree of deformation applied, for the same temperature, the less the amount of time required for nucleation and recrystallization of new grains. For a sample with a 46% reduction, recrystallization was only obtained after 40 minutes, in the oven at a recrystallization temperature of 120 ° C, but for the sample reduced by 80%, only 20 minutes of exposure at this temperature were required. The hardness followed the expected increase in grain size, the larger the grain the lower the hardness obtained, and the more deformed sample the greater the hardness variation compared to the sample with 46% deformation.