Hot-rolled precision steel tubes use continuous cast round tube billet slabs or primary rolling slabs as raw materials, which are heated by a stepping furnace. After descaling with high-pressure water, they enter the roughing mill. ， Implement the computer to control the rolling, after the final rolling, it will be coiled by laminar cooling and coiler to become a straight hair coil. The head and tail of straight hair curls are often tongue-shaped and fish-tailed, with poor thickness and width accuracy, and often have wave-shaped, folded, tower-shaped and other defects on the edges. The coil is heavier and the inner diameter of the steel coil is 760mm. After the straight hair roll is processed by finishing lines such as head cutting, tail cutting, edge trimming and multi-level straightening and smoothing, and then cut or re-rolled, it becomes: hot rolled steel plate, flat hot rolled steel coil, longitudinal Cut tape and other products. If the hot-rolled finishing coil is pickled to remove scale and coated with oil, it will become a hot-rolled pickled coil. Precision steel pipes are widely used in the fields of automobiles, motorcycles, electric vehicles, petrochemicals, electric power, ships, aerospace, bearings, pneumatic components, seamless steel pipes for medium and low pressure boilers, etc., and can also be applied to steel sleeves, bearings, hydraulics, machining, etc.
The production process of precision steel tubes is the same as that of ordinary seamless tubes, but it has more procedures of final pickling and cold rolling.
Precision steel pipe process:
Blank-inspection-peeling-inspection-heating-perforation-pickling passivation-repair grinding-lubrication air drying-cold rolling-degreasing-cutting head-inspection-identification-Product packaging.