According to Fu et al. [6], the development of WEBs can be theoretically predicted by the following two equations: dlLC dN  (CθV−CbV)= ∆γ b  [ 3 (π 2 )13 ( AD kT ˙N )23  C b V ] , (1) λC 0 V  = l LC = lLCC θ V +(λ−lLC)C b V, (2) where lLC denotes the thickness of lenticular carbides, N denotes the number of stress cycles, Cθ V  and Cb V  denote the carbon concentrations in a lenticular carbide and its adjacent ferrite band, respectively, ∆γ denotes the local plastic shear strain per stress cycle, b denotes the magnitude of Burgers vector, A denotes the interaction energy between a carbon atom and a dislocation strain field, D denotes the diffusion coefficient of carbon atoms in body-centred cubic iron, k denotes the Boltzmann constant, T denotes temperature and ˙N denotes rotational speed, λ denotes the width of a fully developed WEB, and C0 V  denotes the overall carbon concentration of the steel.