FAILURE OF WORK ROLL OF COLD-ROLLING MILL

The paper focuses on the role of microstructure in the premature failu re of a multistand cold rolling work roll. Various mechanical, thermal , and microstructural factors leading to roll failure in general have been briefly discussed. It has been shown that cracks initiate at the subsurface region of the roll, propagate obliquely into the hardened s hell, and branch out in a river pattern during cold rolling.