Tungsten carbide (WC) is twice as strong as steel and has a hardness similar to corundum. Tungsten carbide rollers combine exceptional hardness with wear resistance and are available in custom sizes.
Cemented carbide roller used on the stretch reducing mill for bars, thread steel bars and common wire with the durability 10 to 20 times higher compared to common steel roller. The surface quality and the steel bar size accuracy are greatly improved. The cemented carbide roller reduces effectively the production cost and improves the quality.
The main performance indicators of the roll are the strength of the core and the toughness and wear resistance of the working layer. The performance requirements for the finishing rolls of bar mills are mainly wear resistance and toughness, taking into account hot crack resistance and strength. Traditional bar mill rolls are usually made of integral centrifugally cast ductile iron rolls with a roll surface hardness of 74~78HSD. In order to further improve the wear resistance of the finishing rolls and increase the rolling capacity of the single groove, drawing on the experience of using cemented carbide roll rings in high-line finishing mills, in recent years, more and more manufacturers have adopted carbide roll rings instead of ductile iron rolls in bar rolling mills. more.
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