Description：High speed wire mill precision rolling unit is an important factor to ensure the high precision rolling, so high speed wire rolling mill must adopt tungsten carbide carbide roll ring, otherwise the rolling speed and the wear resistance of roll ring will not be guaranteed. So far, no material can replace the tungsten carbide carbide roller ring of high speed wire rolling mill.
Keyword：High-speed wire rolling mill, rolling mill rolls material selection
igh-speed wire mill has the characteristics of fast rolling speed, high product accuracy, good surface quality, large rolling plate, and no torsion and microtension of the whole rolling line. High-speed wire rolling mill is composed of rough rolling unit, middle rolling unit, pre-finishing rolling unit and finishing rolling unit, usually the whole rolling line generally ranges from 28 to 30 sets.
The rolling unit is generally composed of 4~8 racks. Due to the high rolling temperature, large section and deep rolling groove, the rollers used for the rolling frame should have good fracture resistance, heat crack resistance, wear resistance and good biting performance. Generally, ball tile iron roller with hardness of HSD 45-55 or alloy semi-steel roll with hardness of HSD 45 ~50.
The roll of the rolling unit generally requires good wear resistance and rough surface resistance, and there is no big difference in material selection. Therefore, the rolling unit in high-speed wire mill generally selects duclet iron roll with hardness of HSD 60 ~70 or alloy infinite cold hard duclet iron roll, which is both economical and practical.
The pre-finishing rolling unit of high speed wire mill can reduce the rolling accident and improve the size accuracy of finished wire. Therefore, the principle of selecting the roll material for the pre-finishing rolling unit should be that the roll used for the unit can play the role of connecting the past and the future, and the wear resistance of the roll should be taken as the main good basis.
Foreign high-speed wire rolling mill choose a wide range of pre-finishing rolling unit ring materials, some manufacturers use tungsten carbide carbide roller ring, although the wear resistance is very good, but the strength is low, there will be fracture phenomenon. The centrifugal composite ring and high speed steel rolling have 3 times higher wear resistance than high nickel-chromium-platinum infinite cold hard cast iron, higher strength than tungsten carbide carbide roll ring, and the price is lower. Therefore, centrifugal composite roll ring and high speed steel roll will be the preferred material for roll or roll ring in the future.
High speed wire mill precision rolling unit is an important factor to ensure the high precision rolling, so high speed wire rolling mill must adopt tungsten carbide carbide roll ring, otherwise the rolling speed and the wear resistance of roll ring will not be guaranteed. So far, no material can replace the tungsten carbide carbide roller ring of high speed wire rolling mill.
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