C - Chemistry – Metallurgy – 22 – C
Patent
C - Chemistry, Metallurgy
22
C
C22C 38/40 (2006.01) C21D 1/19 (2006.01) C21D 8/02 (2006.01) C22C 38/00 (2006.01) C22C 38/04 (2006.01) C22C 38/08 (2006.01) C22C 38/18 (2006.01) C22C 38/58 (2006.01)
Patent
CA 2470384
Carbon steels of high performance are disclosed that contain dislocated lath structures in which laths of martensite alternate with thin films of austenite, but in which each grain of the dislocated lath structure is limited to a single microstructure variant by orienting all austenite thin films in the same direction. This is achieved by careful control of the grain size to less than ten microns. Further improvement in the performance of the steel is achieved by processing the steel in such a way that the formation of bainite, pearlite, and interphase precipitation is avoided.
L'invention concerne des aciers au carbone haute performance contenant des structures de lattes disloquées, les lattes en martensite alternent avec des fines pellicules d'austénite, chaque grain de la structure de lattes disloquées étant toutefois limité à une seule variante microstructurale du fait de l'orientation identique de toutes les fines pellicules d'austénite. Pour ce faire, il faut contrôler soigneusement la taille du grain qui ne doit pas dépasser dix microns. On améliore des performances de l'acier en traitant ce dernier de manière à éviter la formation de bainite, de perlite ainsi que la précipitation interphase.
Kusinski Grzegorz J.
Pollack David
Thomas Gareth
Fetherstonhaugh & Co.
Mmfx Technologies Corporation
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