History and properties of carbide roller ring are introduced
发布日期：2019-10-23 浏览次数：317
An overview of the
Carbide roller ring alias also known as tungsten carbide roller ring, superior performance, quality stability, high processing accuracy, has a better wear resistance and high impact resistance.
The development course
The carbide roller ring was born with the development of metal processing industry after the invention of powder metallurgy technology in 1909. Since 1918, Germany introduced the cemented carbide wire drawing die, which stimulated the study of cemented carbide in various countries, and rollers for various purposes also appeared one after another. However, the extensive application of cemented carbide rolls was after 1960. In 1964, Morgen introduced the first high-speed twistless wire mill, which increased the finishing speed of wire by four times. Because the finishing mill group is in high speed, high stress work, cast iron roll, tool steel roll wear resistance is poor, rolling groove life is short, roll repair and loading and unloading is very frequent, affecting the mill efficiency, has not adapted to the requirements of finishing rolling production, it is replaced by combined carbide roll. The world has more than 200 sets of Morgan mill, annual consumption of cemented carbide roll several hundred tons.
The performance characteristics of
The hardness of cemented carbide roll is high, and its hardness value changes little with the temperature. At 700℃, the hardness value is 4 times that of high-speed steel. The modulus of elasticity, compressive strength, bending strength, thermal conductivity are also more than 1 times higher than the tool steel. Due to the high thermal conductivity of the cemented carbide roll, the heat dissipation effect is good, so that the surface of the roll is at high temperature for a short time, so that the roll and the harmful impurities in the cooling water in the high temperature reaction time is short. Therefore, the cemented carbide roll is more resistant to corrosion and cold and heat fatigue than the tool steel roll.
