Avaliação dos efeitos dos parâmetros de laminação a frio nas propriedades mecânicas e microestruturais do aço SAE 1013 para produção do vergalhão CA 60

• Autor(a) principal: Brito, Eveline Carvalho de
• Data de Publicação: 2018
• Tipo de documento: Trabalho de conclusão de curso
• Idioma: por
• Título da fonte: Repositório Institucional da Universidade Federal do Ceará (UFC)
• Texto Completo: http://www.repositorio.ufc.br/handle/riufc/39007
• topic: Trefilação; Laminação a frio; CA 60; Microestrutura; Propriedades Mecânicas; Título

Increasingly, the need to meet the requirements of quality, time and productivity at a lower cost, is an indispensable factor in the industrial sector. The manufacture of CA60 rebar, whether domestic or imported, and the commercialization in the country must be compulsorily certified, in accordance with the Conformity Assessment Program for Steel Bars and Wire for Reinforced Concrete Reinforcement Structures, with a focus on safety as per Portaria 73, of March 17, 2010 of INMETRO. In this context, this study aimed to evaluate and understand the variables that influence the mechanical and micro structural properties in the cold rolling process. In this work, the interrelations between the cold rolling speed and the cooling rate of the CA-60 were studied. The production of the CA60 3.40 mm and the wire tests were carried out at the Quality Control Laboratory of Ceará Industrial Steel and at the Mechanical Characterization Laboratory (LACAM) belonging to the Department of Metallurgical Engineering and Materials of the Federal University of Ceará. The results show that the process temperature and the cooling pass is effective with decreasing the temperature, obtaining reductions around 40-50 ° C; the folding test of all samples was approved; in the tensile test all the samples were approved in the minimum requirements established by the norm ABNT NBR 7480:2007; the values of the microhardness test, both in the rolling direction and in the perpendicular direction, show a considerable increase of hardness in the samples after the cold forming in comparison with the wire rod. It was also verified that there was increase of hardness for the samples with cooling (B), being more significant for the samples produced in the intermediate speed of 10m/s. It was concluded that the objectives were reached, since the values of the mechanical properties, such as limit of tensile strength, yield limit, elongation and microhardness were verified, and that it was possible to relate them to the influence of the rolling speed and cooling. Therefore, this study is another contribution to the knowledge of metallurgical engineering.