Tube Mill Rollers

The performance and quality of a roll generally depends on its chemical composition and manufacturing method and can be assessed by its structure, physical and mechanical properties, and the type of residual stress present inside the roll (see roll inspection). The use effect of the roll in the rolling mill depends not only on the material of the roll and its metallurgical quality, but also on the conditions of use, roll design, operation and maintenance.

The operating conditions of the rolls of different types of rolling mills are very different, and the factors that cause the difference are:

(1) Mill conditions. Such as rolling mill type, rolling mill and roll design, pass design, water cooling conditions and bearing types;
(2) Rolling conditions such as the variety, specification and deformation resistance of the rolled material, reduction system and temperature system, output requirements and operation, etc.;
(3) Requirements for product quality and surface quality, etc.

Therefore, different types of rolling mills and the same type of rolling mills with different use conditions have different requirements for the performance of the rolls used, such as billet and slab blooming mill rolls should have good torsion and bending strength, toughness, bite, Thermal crack resistance and thermal shock resistance and wear resistance; while the hot strip finishing stand requires high hardness, indentation resistance, wear resistance, spalling resistance and thermal crack resistance of the roll surface.

Only by knowing the conditions of use of the rolls and the failure modes of the rolls used in the same type of rolling mill, and understanding the performance and manufacturing process of the current various roll materials, can the technical conditions of the rolls for the rolling mill be more correctly formulated and suitable and economical. .