Patent ID: 8328965
Filing Date: 2012-12-11
Classification: C21D,C22C

Abstract:
1. A method for manufacturing mechanical components made of spheroidal cast iron, comprising the following steps: providing a casting of a mechanical component made of cast iron having a percentage of ferrite higher than 20% and having a carbon content ranging from 2.5% to 4.0% and a silicon content ranging from 2.0% to 3.5%; bringing said cast iron casting to a temperature suitable for partial austenitizing, which is higher than the lower austenitizing temperature (A performing a thermal treatment of the structure comprising ferrite and austenite for isothermal hardening at a temperature ranging from 250° C. to 400° C. so as to obtain a matrix which has an at least partially pearlitic-ferritic or perferritic structure.