The roller has high hardness, and its hardness value changes little with temperature, and the hardness value at 700℃ is 4 times that of high speed steel; The elastic modulus, compressive strength, bending strength and thermal conductivity are also more than 1 times higher than tool steel. All these properties ensure that the tungsten carbide roll has much better wear resistance and deformation resistance than the tool steel roll during the working process, thus ensuring the finish and size of the roll groove constancy, which is essential to ensure the surface quality and dimensional accuracy of the wire. Due to the high thermal conductivity of the tungsten carbide roll, the heat dissipation effect is good, so that the roll surface is at high temperature for a short time, so that the high temperature reaction time of the roll with the harmful impurities in the cooling water is shorter. Tungsten carbide rolls are more resistant to corrosion and heat and cold fatigue than tool steel rolls.