A evolução da microestrutura, propriedades mecânicas e textura cristalográfica na fabricação do vergalhão CA-60.

Abstract

Steel is a material present in various sectors of the current economy. It s use ranges from the industrial sector, such as the automotive, to the food sec tor, such as packaging. There are different metalworking processes for shaping and matching the alloy s properties to the application needs, such as drawing and cold rolling. Although the two methods have the same purpose of increasing resistance, there ar e differences between them that influence the final product . Aiming at the differentiation and practical study of the mentioned resistance increase processes , this work uses wire rod of 5.5mm diameter of low carbon steel comparing drawing and cold rolling in terms of mechanical tests and microstructure for the productio n of CA 60 bars of diameter 4, 2mm and evolution of the crystallographic texture between the passes of the processes. In addition, it compares wire drawing of 7.0mm and 5.5mm resulting in 4.2m m bar . At the end of the tests, the rolled products showed higher results in the tensile tests, the microstructure demonstrated the stretching of the grains on the surface and the two methods presented texture in the same final directions with different in tensities. Among the products drawn from different diameters, the 7.0mm wire showed higher final hardening due to its greater reduction, confirmed in the tensile tests and the microstructure.