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High-speed steel rolls have higher steel passing per groove (times) due to their good wear resistance, which saves roll changing time, improves rolling mill operation rate, reduces roll consumption, and improve the overall efficiency of the factory. Generally, the amount of steel passing in a single groove (times) is 3 to 5 times that of cast iron rolls.
● High-speed bar pre-finishing stand, finished product stand, finished product pre-rolling stand, pre-slicing stand, slitting stand of bar rolling mill
● High-speed wire rod mill pre-finishing mill
● Hot rolling narrow and medium wide steel rolling mill finishing mill
● Finishing stand of spring flat steel mill and small section steel mills such as angle steel and channel steel
High-speed steel has high wear resistance and hardenability, especially red hardness at high temperatures, which makes high-speed steel more suitable for roll manufacturing materials.
●The HSS rolls material contains high alloy elements such as vanadium, tungsten, chromium, molybdenum, niobium, etc. The types of carbides in the roll structure are mainly MC type and M2C type. Compared with ductile iron rolls and high-nickel-chromium rolls, the single-groove (time) steel passing is higher, which saves roll changing time, improves rolling mill operation rate, reduces roll consumption, reduces production costs, and improves the overall benefit of the factory.
●The HSS rolls material has a high expansion coefficient and good thermal conductivity. While the roll wears a small amount of the groove during the rolling process, the hole shape continues to become smaller due to the expansion of the high-speed steel material itself. Therefore, the high-speed steel roll is rolling. During the rolling process, the change of the rolling groove is small, and the consistency of the pass size is maintained for a long time, especially when rolling bars or rebars, it is more conducive to control the negative tolerance of the rolling material.
● During the use of the high-speed steel roll, under good cooling conditions, a thin and dense oxide film is formed on the surface of the roll body. This uniform, thin and dense oxide film can exist for a long time without falling off, making the high-speed steel roll wear-resistant. Sex is significantly improved. ● Since the core of the centrifugal casting high-speed steel roll is made of alloy ductile iron material, the strength of the roll neck is high
●The HSS rolls have good thermal stability, and the roll surface has high hardness and good wear resistance at rolling temperature. ●The HSS rolls have good hardenability, and the hardness hardly decreases from the surface of the roll body to the inside of the working layer, thus ensuring that the roll has the same good wear resistance from the outside to the inside.
The performance of rolls depends on the microstructure of the final roll. Obtaining high-hardness granular carbide and fine matrix structure is the basic guarantee to improving roll performance.
It can be seen from the metallographic photos that the metallographic structure of the high-speed steel roll is much better than other materials in terms of the shape, quantity, size and distribution of carbides, as well as the matrix structure and grain size.
The HSS rolls and roll rings produced by our company have been widely used in more than 300 rolling production lines in almost all large steel mills in China, and are exported to dozens of countries on five continents.
In 2014, the annual production capacity was expanded to 15,000 tons. In 2020, the output of HSS rolls and roll ring series products exceeded 10,000 tons.
The company now has more than 100 sets of intermediate frequency furnaces, centrifuges, heat treatment furnaces, and CNC machining equipment.
weˊve been concentrated on the development and innovation of the production process and materials of them, and have obtained a number of HSS roll and HSS roll ring patents.
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Ganjingzi District, Dalian 116000, China
Email: info@baosteelpump.com
