Análise da temperalidade de um aço ABNT 1024 aplicado em vergalhão da empresa SINOBRAS S/A

Abstract

Steel is the metalic material most used in the world, a fact due to its great versatility of properties and applications and hence also their ability to fit through the heat treatments. Quenching is the heat treatment that aims to increase the hardness of the steel through the formation of metastable structure called martensite, and this treatment depends on factors such as carbon and alloying elements, and is characteristic for each type of steel. In order to examine the capability of a steel to form martensite is adopted technological tests which analyzes the response to treatment of the material in controlled conditions of temperature, being the most important is a Jominy hardenability test, in which the piece is cooled in water stream from one of its ends and its hardness is subsequently analyzed over the specimen used. This study aimed to assess the hardenability of a steel ABNT 1024 and compares it with the values obtained for other steel ABNT 1045 and the results obtained difference in hardness found and the realization that this steel does not acquire significant hardening, resulting only in a small hardened layer, a characteristic that is lost rapidly with distance from the quenched end of the piece.