Ni in CA6NM martensitic stainless steel

Ni—— the alloying element has no strengthening effect on the matrix of stainless steel CA6NM. According to the known Cr will promote the formation of ferrite.

The role of Ni in CA6NM martensitic stainless steel

Ni—–the alloying element has no strengthening effect on the matrix of martensitic stainless steel CA6NM. According to the known Cr will promote the formation of ferrite. Thus a proper amount of Ni (4~6, wt%) should be added to the 13Cr super martensitic stainless steel CA6NM. Thus will enlarge the γ region and will ensure the formation of martensite structure in the cooling process after solution heat treatment. And that will not be producing a single ferrite or other phases.

The alloying element Ni in CA6NM has a positive effect on improving the toughness of steel. When the steel contains some amount of Ni, it will not carry out the martensite transformation at room temperature after solid solution heat treatment. There will be a small amount of residual austenite which is soft. Thus improve the toughness of the stainless steel CA6NM. So, the appropriate content of Ni is especially important for the mechanical properties of steel.