The role of alloying elements in CA6NM martensitic stainless steel tube
Adding micro alloy elements Ti, Nb and V in martensitic stainless steel tube is usually expected to form a nitrogen compound with C and N. As a result increasing the strength of the steel. Ti is a stabilizing element. At the same time it is a fine crystalline element. Ti can form a variety of stable carbon nitrogen compounds. Finally Ti (C, N) can effectively increase the toughness without sacrificing strength. The addition of 0.1% Nb in CA6NM martensitic stainless steel can effectively reduce the precipitation of the rich Cr ions. Because Nb can preferentially combine with C and N atoms to form nanometer grade Nb rich precipitates (5-15nm). The homogeneous distribution of rich Nb precipitates can significantly increase the strength of the steel and hence optimize its plasticity and toughness.
