Patent ID: 9587301
Date: 2017-03-07
CPC Classifications: C21D,C22C,C23C,E21B

Claim:
1. A method for manufacturing a cemented steel part, wherein: a blank of said part is prepared in a steel, and it is shaped by forging; a cementation is carried out on said blank at atmospheric pressure, and a succession of steps during the cementation is the following: heating up to a temperature of an enrichment level; the enrichment level being at a temperature from 900 to 980° C. for 3 to 20 hrs and at a carbon potential comprised between 0.8 and 1.2%; diffusion at a temperature from 820 to 880° C. at a carbon potential comprised between 0.6 and 0.8%, with a treatment period from 1 to 3 hrs; quenching in oil at a temperature of less than or equal to 160° C.; and tempering at a temperature comprised between 150 and 250° C. and for a period comprised between 1 and 4 hrs.