Influência da Velocidade de laminação e trefilação nas propriedades mecânicas e na microestrutura de um aço SAE 1013 na produção de vergalhão CA 60.

Abstract

The rebar produced by processes of mechanical cold forming from the machine wire, are the main products used in the civil construction sector. And industries are currently looking for increasing productivity at a lower cost and f or that, studies are needed in the area in order to obtain a product with an increasingly better quality that meets the norms and requirements of the market, which in the case of CA 60 rebar are ordinance 73, of March 17, 2010 of INMETRO and the norm ABNT NBR 7480: 2007. For this reason, this work aims to evaluate and understand the influence of the conformation velocity on the mechanical and microstructural properties of the CA 60 . The base of this study was the traction test, carried out on test specimens of circular section, submitted to 2 processes of cold forming, lamination and drawing, produced with three different speeds of conformation each. In this study, the force displacement curves will be raised, and values of Resistance Limit, Flow Limit and Stretch will be obtained. Thirty five tests were carried out, where the values of these properties varied from 470 to 784 Mpa for Resistance and from 332 to 744 Mpa for yield strengh approximately With this data, the Coexistence of Coverage ( and Coe fficient of Resistance (K) were calculated.