The working condition of the roll in the rolling mill is complex. The roll will produceresidual stress and thermal stress in the preparation process before manufacturing and using. It is further subjected to a variety of cyclic stresses, including bending, torsion, shear, contact and thermal stresses. The distribution of these stresses along the roll body is uneven and constantly changing due not only to design factors, but also to the wear and tear of the roll in use, the temperature and the changing roll shape. In addition, abnormal rolling conditions often occur. The roll can also be damaged by thermal stress if it is not cooled properly after use. So roll in addition to wear, but also often appear cracks, fracture, spalling, indentation and other local damage and surface damage. A good roller, its strength, wear resistance and other performance indicators should have a better match. In this way, not only in the normal rolling conditions durable, but also in some abnormal rolling situation when less damage. Therefore, the metallurgical quality of rolls should be strictly controlled or external measures should be taken to enhance the bearing capacity of rolls. Reasonable roll shape, pass, deformation system and rolling conditions can also reduce the work load of rolls, avoid local peak stress and extend the life of Rolls. Xiangyang roll, Roll Company, Roll Heat treatment