Patent ID: 8192560
Filing Date: 2012-06-05
Classification: C21D,C22C,Y02P

Abstract:
1. Method for producing a component from steel, characterized in that the method comprises the following steps prior to the finishing of the component which provides the component with its definitive shape: preparing a steel characterized in that the composition thereof is, in percentages by weight: the remainder being iron and inevitable impurities resulting from the production operation; forging the steel; a softening tempering operation at 600-675° C. for from 4 to 20 hours followed by cooling in air; solution heat treating at 900-1000° C. for at least 1 hour, followed by cooling in oil or air which is sufficiently rapid to prevent the precipitation of intergranular carbides in the austenite matrix; and hardening ageing at 475-600° C. for from 5-20 h; thereby providing steel which has an Rm at ambient temperature between 2200 and 2350 MPa.