Hr. Le et Mpe. Sutcliffe, A two-wavelength model of surface flattening in cold metal rolling with mixed lubrication, TRIBOL T, 43(4), 2000, pp. 595-602
A new model of surface flattening is developed for cold metal rolling in th
e mixed regime. Longitudinal surface roughness is modeled by two separate w
avelengths. The new model follows the asperity crushing analysis of Sutclif
fe (1999) for unlubricated rolling but additionally includes a hydrodynamic
model to account for the effect of the lubricant. The effect of various pa
rameters including speed, reduction in strip thickness, roughness wavelengt
h and lubricant properties is examined. The results show similar behavior t
o previous models of mixed lubrication, with a speed parameter Lambda(s) ha
ving the most influence, and confirm the results for unlubricated rolling t
hat the short wavelength components of the surface roughness persist more t
han the long wavelength components. The predicted changes in roughness are
in good agreement with experiments.