High precision roll

High-precision rolling mill rolls are the key to affecting steel rolling efficiency and plastic deformation. Everyone knows that in order to roll out products that meet the requirements, the requirements for rolls are very strict. It is necessary to analyze and judge the raw materials first, as well as the hardness and resistance of the products. The properties such as grinding and toughness have a certain basis for the rolling speed of the roll, and the rolling speed is not arbitrarily designed.
Rolling different product hardness is inevitable. In the steel rolling process, only the material of the roll can be changed to meet the needs of the rolling production of the product. Generally, the hardness of the roll is high and the wear resistance is also high, so the material loss is low. However, the wear of the roll is not only related to its hardness, but also to the hardness of the product metal properties of the rolled steel. The wear resistance coefficient is a function of the ratio K of the roll hardness to the product hardness.

When the ratio K=0.2~1.1, the wear resistance coefficient increases with the increase of the hardness of the roll, but when the hardness of the roll increases again when K is 1.1, the increase of the wear resistance coefficient is not significant, and the impact toughness of the roll decreases, resulting in rolled steel Efficiency drops. This is because the higher the hardness of the roll, the greater the brittleness and the smaller the impact toughness. During the continuous rolling operation, the roll and the product have high-speed impact and after rolling, the fatigue strength decreases.

Through the above introduction, I believe that everyone has a detailed understanding of the issue of “the impact of the roll on the rolling efficiency”, and I hope to help you.