Rolls are important parts of rolling mills. They use the pressure generated by a pair or a set of rolls to roll steel. It mainly bears the effects of dynamic and static loads, wear and temperature changes during rolling.
Commonly Used Roll Materials and Selection Requirements Read More »
The spalling form of hot rolling work roll is different from that of fracture surface and support roll. The former mainly occurs in the upstream racks of hot tandem mills, and most of them are small pieces of spalling, resulting in pits or ellipsoidal pits on the surface of the rolls, which are distributed in the range of the roll body in contact with the rolling piece.
Why Does Hot Rolling Work Roll Peel off? Read More »
Cast steel rolls can be divided into two categories: steel rolls (carbon content 0.4-1.4%) and semi-steel rolls (carbon content 1.4-2.4). Steel rolls have low carbon content, so their hardness is low, and their structure is generally composed of iron.
Classification of Cast Steel Rolls Read More »
The carbon content of cast iron rolls is about 2.5%-3.5%. According to the main materials, they can be divided into four categories: ordinary cast iron rolls, high nickel-chromium infinite chilled composite cast iron rolls, high chromium composite cast iron rolls and alloy ductile iron rolls.
Classification of Rolls Read More »
Among the rolling mill components, the operating conditions of the rolls are the most messy. Residual stress and thermal stress will occur in the preparation process before the roll is manufactured and used. During the working process, it is further subjected to the effects of various periodic stresses, including twists, changes, shear forces, contact stresses, and thermal stresses.
How to Prevent the Hazards of Rolls and Improve Work Efficiency? Read More »
The roll is the core component of the rolling mill. The use of the roll involves the type selection of the rolling mill, the preparation of the roll, maintenance and periodic repair during the rolling process, all of which affect the productivity, product quality and production economy of the rolling mill.
What Should be Paid Attention to When Welding Rolls? Read More »
Regardless of hot rolling or cold rolling, the roll is a direct tool to achieve metal deformation during the rolling process. Therefore, the quality requirements of the rolls are strict. Its main quality requirements are strength, hardness, and certain heat resistance.
Technical Requirements of Rolls and Reasons for Broken Rolls Read More »