How to correctly select cast iron rolls to meet production requirements

Residual stress and thermal stress will occur in the preparation process before making and application of cast iron roll. When it is used, it is further subjected to the effects of various periodic stresses, including bending, modification, shear, contact stress and thermal stress. Today, let the roll manufacturer Wuxi Taihu roll Xiaobian explain to you how to correctly select cast iron rolls to meet production requirements. I hope it can help you

The distribution of roll stress along the roll body is uneven and constantly changing. The reason is not only the planning elements, but also the continuous changes of roll wear, temperature and roll shape. In addition, rolling conditions are often abnormal. If the roller is cooled improperly after use, it will also be damaged by thermal stress. Therefore, in addition to wear, the roll often presents various partial hazards and surface hazards such as crack, fracture, falling off, indentation and so on. A good roll should have a better match between its strength, wear resistance and other performance indexes. In this way, it is not only durable under normal rolling conditions, but also less harmful in some abnormal rolling conditions. Therefore, when making rolls, we should strictly control the metallurgical quality of rolls or supplement external measures to enhance the bearing capacity of rolls.

The rolled steel grade is the key element for selecting the roll. Its deformation resistance changes with the chemical composition of the blank, which is mainly reflected in the load and change of deformation in each stage of rolling. It is necessary to select the roll according to the confirmed strength and hardness.

There are many kinds of rolling mills producing long products. Therefore, the selection and layout of rolling mill type, the selection of roll raw materials and the determination of roll size. Facing the rapid development of iron and steel industry, China's roll manufacturing enterprises continue to increase capital investment planning and accelerate the pace of skill transformation. The transformation of skill allocation has not only greatly improved the internal quality of rolls in China, but also directly promoted the progress of roll manufacturing skills. The centrifugal casting technology is widely used in China and has become an advanced casting technology.

In order to shorten the production cycle and advance the application function of roll, now heat treatment has become the core skill of roll manufacturing enterprises. For example, Sinosteel Xingji has selected the triple molten steel training skills of electric furnace training + ladle refining + electroslag remelting, electroslag ingot forging and forming skills, as well as international advanced heat treatment skills such as dual frequency quenching, liquid nitrogen cryogenic treatment, high, medium and low temperature tempering in recent years

Before selecting the appropriate roll to achieve the added production rate and improve product quality, it is necessary to fully understand the types and configuration of various rolling mills, which is also a very important step to correctly select the roll to meet the production requirements.

The simple introduction of how to select the right cast iron roll is to meet the above requirements. If you want to know more about cast iron roll, please pay attention to Wuxi Taihu roll Xiaobian.