Roll manufacturers come to talk about the development of high speed steel rolls

High carbon high-speed steel roll (abbreviated as high-speed steel roll) is a hot-rolled roll material with very short launch time, rapid development and wide application prospect. It is also a research project of many roll manufacturers. Today, let the roll manufacturer Wuxi Taihu roll Xiaobian bring you the history of the development of high-speed steel rolls.

Since its appearance in Japan in 1988, it has been widely used in hot rolling roughing mill, hot strip finishing mill, cold strip mill, steel pipe mill, section mill and rod and wire mill. The metallographic arrangement of a typical high-speed steel roll is composed of martensite (or bainite) matrix, high hardness MC, M2C, M6C, M7C3 and other types of carbides. There are also reports on the research and application of high-speed steel rolls in China. The general iron and Steel Research Institute took the lead in developing high-speed steel rolls in China and has achieved outstanding application in hot-rolled narrow strip mills and bar mills. Beijing Metallurgical Equipment Research Institute, Xi'an Jiaotong University, Henan University of science and technology, Xingtai roll factory and WISCO roll factory also conducted in-depth research on the preparation skills of high-speed steel roll. The successfully developed high-speed steel roll has been used in high-speed wire rod mill and bar mill., The setting process, heat treatment process, mechanical function and wear resistance of high carbon high speed steel for roll have also been deeply studied in China. In order to improve the setting arrangement of high-speed steel roll and advance its mechanical function, the modification treatment method of high-speed steel roll is also discussed in China, which significantly improves the arrangement and function of high-speed steel roll.

Handan Iron and Steel Co., Ltd., Zhuzhou iron and Steel Co., Ltd. and Anshan Iron and Steel Co., Ltd. have also introduced some high-speed steel rolls from abroad and accumulated valuable experience in the application, maintenance and grinding of high-speed steel rolls. High speed steel rolls are mainly made by centrifugal casting (CF), continuous pouring process for cladding (CPC) and electroslag remelt (ESR) in foreign countries, while liquid metal electroslag fusion (esslm), hot isostatic pressure (hip) and spray stacking (Osprey) are still improving and developing.

The high-speed steel roll made by CPC method has a large degree of freedom in alloy design, and the roll can be rich in hard VC and M2C (or M6C) and other carbides with good wear resistance. Although centrifugal casting method has an overwhelming advantage in cost, there is a phenomenon of solid and liquid phase centrifugal separation in the condensation process. In order to avoid the above situation, its chemical composition needs to be limited. It is worth pointing out that compared with the high-speed steel roll made by CPC method, the hot crack of the high-speed steel roll made by centrifugal casting method is deep and it is also prone to fine fragmentation.

Because the equipment of high-speed steel roll made by CPC method is disorderly, it is still unable to be produced in China, while the roll made by ESR method has high energy consumption and is only suitable for making cold roll. Centrifugal casting roll is equipped with simple and high efficiency, which is the primary method to make high-speed steel roll. However, it is prone to segregation and cracks, which has not been well handled in China.

The price of high-speed steel roll imported from abroad is high. Therefore, the implementation and application of domestic high-speed steel roll is slow, which is very inconsistent with the position of large steel producing countries at home and abroad. In order to promote the use of high-speed steel roll, in-depth study of the key skills in the production of high-speed steel roll will be of great significance, which is worthy of the attention of the majority of roll development operators.

OK, the above is a brief introduction to the development of high speed steel roll. If you want to know more about the roll manufacturer, please pay attention to the roll manufacturer Wuxi Taihu roll Xiaobian.