High-speed steel vertical roller
High-speed steel vertical rolls are produced in a composite manner. The outer layer is made of high-speed steel and the core is made of forged steel with good toughness. Compared with traditional materials, high-speed steel vertical rollers have the characteristics of high alloy content, good red hardness, excellent abrasion resistance and thermal cracking resistance. A large number of high-microhardness carbide particles dispersed in the matrix are used as abrasion-resistant particles in use. Bearing the wear can significantly reduce the amount of roll wear on the machine and achieve a doubling of the rolling cycle. At the same time, it can reduce the number of roll changes, reduce labor costs, and improve production efficiency.
The roll surface of the high-speed steel vertical roll has smooth, low wear and no plastic flow, which effectively improves the quality of the strip edge, reduces the incidence of quality problems such as burrs, black lines, and edge cracks, and has a high practicality. Application value, and when rolling high-strength steel, stainless steel and other products, the high-speed steel vertical rolls improve the strip edge quality more prominently.
R & D background
The vertical roller is mainly to set the width and ensure the flatness of the side of the board. At present, the vertical rolls of hot-rolled strip mills at home and abroad generally use alloy cast steel, semi-steel and forged steel. The hardness of these three types of rolls is generally low. During the rolling use, the quality of the edges of the sheet is poor, causing burrs, edge cracks, and black lines, and the workload of changing and disassembling is large, which is time-consuming and labor-intensive.
From the perspective of the development of steel mills in terms of capacity reduction and structural adjustment, the hot-rolling work rolls are entering the era of high-speed steel. Sinosteel Xingji also upgraded the vertical roller material to a high-speed steel material with better comprehensive performance, which not only meets the needs of the development of steel rolling production, but also the key is to realize the last link of high-speed steel roller application across the line, which is of great significance.
The performance of high-speed steel vertical rolls is 6-8 times that of traditional vertical rolls, which can significantly extend the rolling cycle, reduce the number of roll changes, and improve production efficiency.