Tungsten carbide roller have high hardness, and its hardness value changes little with temperature, and the hardness value at 700℃ is 4 times of HSS; and the modulus of elasticity, compressive strength, flexural strength, thermal conductivity are also higher than tool steel by more than 1 time. Because of the high thermal conductivity of carbide rolls, so the heat dissipation effect is good, so that the roll surface is at high temperature for a shorter period of time, so that the rolls with the cooling water of harmful impurities in the high temperature reaction time is shorter. Therefore, carbide rolls are more resistant to corrosion and hot and cold fatigue than tool steel rolls.
Tungsten carbide rollers can be divided into two types according to the structure of integral carbide roller and composite carbide rolls. Integral carbide rolls have been widely used in the pre-finishing and finishing stands of high-speed wire rod mills (including sizing stands and pinch-feeding roll stands), etc. Composite carbide rolls are made of carbide and other materials, and can be divided into carbide composite roll ring and overall carbide composite rolls. The carbide composite roll ring is mounted on the roll shaft; the integral carbide composite roll is directly cast in the roll shaft to form a whole, which is used in mills with large rolling load.
Post time: May-07-2023
