The final hot strip profile is a superposition of the roll initial crown, the roll bending and flattening crown, the roll wearing crown and the roll thermal crown. In this research, linear regression models are proposed to predict the roll force, the roll wearing crown and the roll thermal crown using experimental data provided by Mobarake Steel Complex (MSC). The Euler-Bernoulli beam theory ba...

Abstract Based on the three-dimensional field of molten pool and twin-roll strip casting experiments, this work verified cracking mechanism by establishing mathematical model rolling experiments. The results showed that due to instability thermophysical inconsistency kiss curve height, newly solidified will undergo incompatible deformation through rolling. stress concentration appear around lar...

Dual-phase steels are generally used in the car industry due to high tensile strength and good formability, which obtained by a mixture of bainite ferrite phases. This microstructure is achieved through slow rate coil cooling. However, manufacturing dual-phase introduces various challenges such as instability cold rolling process. An important factor affecting this non-uniform cooling hot rolle...

the mechanical properties and microstructural developments of 321 stainless steel during thermomechanicalprocess were investigated. the repetitive cold rolling and subsequent annealing wereconducted to achieve nanocrystalline structure in an aisi 321 stainless steel. heavily cold rolling at−20°c was conducted to form martensite in metastable austenitic steel. the process was followed byannealin...

In the face of global competition, the requirement for dimensional accuracy, mechanical properties and surface properties has become a major challenge on aluminum manufacturing industries. Conventional rolling force formulas, however, provide not more than reasonably exact approximations. The mathematical modeling of the hot rolling process has long been recognized to be a desirable approach to...

We study the stability of a barotropic vortex strip on a rotating sphere, as a simple model of jet streams. The flow is approximated by a piecewise-continuous vorticity distribution by zonal bands of uniform vorticity. The linear stability analysis shows that the vortex strip becomes stable as the strip widens or the rotation speed increases. When the vorticity constants in the upper and the lo...