Thermo-mechanical modeling of two phase rolling and microstructure evolution in the hot strip mill

Effect of Phase Transformation and Latent Heat on Hot Rolling Deformation Behavior of Non-oriented Electrical Steel

“…Meanwhile, the softening effect of dynamic transformation restoration is also considered. 20,21) The expression is as follow:…”

Dissolution and precipitation behaviour in steels microalloyed with niobium during thermomechanical processing

“…The improvement in mechanical properties from TMCP is due to the refinement of the austenite microstructure, maximising the austenite boundary area and deformation band density, subsequently increasing the number of nucleation sites prior to the development of the transformation microstructure. The enhanced mechanical properties of lowcarbon microalloyed steels thereby arises from a combination of the refined ferrite grain size and the dispersion hardening through the precipitation in ferrite [3][4][5][6][7].…”

Numerical simulation of multi-pass rolling force and temperature field of plate steel during hot rolling

“…The plate steel at the entrance of the first pass temperature is 1 100 ℃, and the actual rolling for plate steel is given in Table 1. In order to simplify the simulation, some assumptions are made during the hot rolling process: the width of the plate steel is considerably greater than its thickness, so the conduction in the width direction is neglected; conduction along the length of the plate steel is negligible; rolling is treated as a state process [11] .…”

“…In this study, values of heat transfer coefficient, radiation, friction factor and environment temperature are 0.02 kW/(m 2 · K) [11,13] , 0.7 [13][14] , 0.5 [15] and 25 ℃ respectively in the hot rolling simulation process. Many reports show that roll-gap heat conduction coefficients used by various investigators are in the range 2-200 kW/(m 2 ·K) [11] . The surface oxide coating of plate steel decreases with temperature dropping, and can also increase the coefficient of conductivity.…”