Microstructure and properties of spray formed Cr12MoV steel for rolls

Cr12MoV steel was chosen as the material for spray forming to develop a new type of advanced roll. The as-sprayed Cr12MoV steel has a relatively homogeneous and fine microstructure, which has a finer, more uniform carbide dispersion, and less segregation of Cr than the conventionally processed Cr12MoV steel. The as-sprayed Cr12MoV steel has an average value of density of 7.75 g/cm3, and has a depressed Ms temperature of 150°C and a reduced hardenability in comparison with the conventionally processed one. The lattice parameter of 0.3619 nm was determined for the supersaturated austenite in the as-sprayed steel, which contains tetragonal martensite with an axial ratio c/a of 1.03.