METHOD FOR THE HEAT TREATMENT OF A MANGANESE STEEL PRODUCT AND MANGANESE STEEL PRODUCT HAVING A SPECIAL ALLOY

摘要

The present invention relates to the en-block heat treatment of manganese steel products, wherein the alloy of manganese steel products has a carbon content (C) in the range of 0.02 C 0.35 wt%, and a manganese content (Mn) in the range of 3.5 Mn 6 wt% It includes. The en-block annealing method includes heating (E1) the steel product at a first holding temperature (T1) in the range of 820 ° C. ± 20 ° C .; A first holding step (H1) of holding the steel product for a first holding period (δ1) at a first holding temperature (T1); A faster first cooling step A1 of cooling the steel product to a second holding temperature T2 in the range between 350 ° C. and 450 ° C .; A second holding step (H2) of holding the steel product for a second holding period (δ2) in a range of a second holding temperature (T2); And a sub-step of performing a slower second cooling step A2.