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 steer has a relatively homog eneous and fine microstructure, which has a finer, more uniform carbide dis persion, and less segregation of Cr than the conventionally processed Cr12M oV steel. The as-sprayed Cr12MoV steel has an average value of density of 7 .75 g/cm(3), and has a depressed Ms temperature of 150 degreesC and a reduc ed hardenability in comparison with the conventionally processed one. The l attice parameter of 0.3619 nm was determined for the supersaturated austeni te in the as-sprayed steel, which contains tetragonal martensite with an ax ial ratio c/a of 1.03. (C) 2001 Elsevier Science B.V. All rights reserved.