ER high chromium steel roll
Sinosteel Xingji, while continuously developing high-speed steel rough rolls, is also committed to improving and improving the performance of high chromium steel rolls. The newly developed ER high chromium steel rolls (also known as high wear resistant high chromium steel rolls) use high alloy low segregation casting technology to improve the consistency of the composition in the working layer. At the same time, high-efficiency high-temperature processing technology and large depth rapid cooling control technology are adopted to achieve a significant increase in the martensitic structure of the working layer structure and the microscopic hardness of the matrix. It is an upgrade product of traditional high chromium steel materials.
The outstanding features of the product are: small hardness drop in the entire working layer, no drop in relative wear resistance throughout the life, high thermal fatigue resistance and impact resistance.
Product use advantages: The rolling service has been greatly improved, the quality of the plate has been greatly improved, the probability of contact with the backup roller has been greatly reduced, and the roll consumption has been greatly reduced.
R & D background
In recent years, the rolling of hot-rolled steel strips has developed toward higher, stronger and more economical demands, and has put forward higher requirements for roll wear resistance, roll shape and roll surface retention ability, especially the performance maintenance over the entire life.
The rough rolling mill is in the slab-opening stage of hot continuous rolling. It undertakes more than 80% reduction tasks, and ensures continuous, stable and efficient rolling of the rolling line, which directly determines the production efficiency of the rolling line. However, the traditional high-chromium steel rolls have gradually become increasingly inadequate in performance due to the increasing demand for rolling. At the same time, due to the limitation of the traditional heat treatment process, the working layer has a limited processing depth, which makes the performance difference of the roller in the later period of use larger, which affects the overall performance.
This product solves the problem of high accident rate of excessive use of ER high chromium steel rolls under the traditional use system, and achieves the double effect of 100% roll service of 100% working layer. When rolling special steel grades, the effect is more prominent.