Precision steel pipe is a high-precision steel pipe material processed by cold drawing or hot rolling. Due to the advantages of no oxide layer on the inner and outer walls of precision steel pipes, no leakage under high pressure, high precision, high finish, no deformation in cold bending, flaring, and no cracks in flattening, it is mainly used to produce pneumatic or hydraulic components, such as cylinders or Oil cylinders can be seamless pipes or welded pipes.
Product number
Precision steel pipe has high dimensional accuracy and smooth surface inside and outside the pipe. After heat treatment, there is no oxide film on the inner and outer surfaces of the steel pipe. The steel pipe is flared, flattened without cracks, and cold-bent without deformation. deal with.
Main steel pipe grades: 10#, 20#, 35#, 45#, 40cr, 42crmo, 16mn, etc.
The national standard for precision steel pipes; GB/T699-2008, the national standard for precision steel pipes; GB/T3639-2008, and there may also be precision steel pipes for GB/T8162-2008 structures.
The European standard of precision steel pipe is: DIN2391
Basic use
Precision steel pipes are widely used in automobiles, motorcycles, electric vehicles, petrochemicals, electric power, ships, aerospace, bearings, pneumatic components, medium and low pressure boiler seamless steel pipes, etc., and can also be applied to steel sleeves, bearings, hydraulic pressure, machining, etc. field!
The production process of precision steel pipes is the same as that of ordinary seamless pipes, except for the final pickling and cold rolling process.
Precision steel pipe process
Tube billet—inspection—peeling—inspection—heating—piercing—pickling and passivation—grinding—lubricating and air drying—cold rolling—degreasing—head cutting—inspection—marking— -Product packaging
Features
1. Smaller outer diameter.
2. High precision can be produced in small batches.
3. The cold drawn finished product has high precision and good surface quality.
4. The cross-sectional area of the steel pipe is more complicated.
5. The performance of the steel pipe is superior, and the metal is relatively dense.
Hot-rolled precision steel pipes use continuous casting round tube slabs or rough-rolled slabs as raw materials. They are heated in a walking heating furnace, descaled by high-pressure water, and then enter the rough rolling mill. , the implementation of computer-controlled rolling, after the final rolling, it will go through laminar flow cooling and coiler coiling to become a straight hair roll. The head and tail of straight hair curlers are often tongue-shaped and fish-tail-shaped, with poor thickness and width precision, and the edges often have defects such as wavy, hemmed, and tower-shaped. The coil weight is relatively heavy, and the inner diameter of the steel coil is 760mm. After the straight hair coil is processed by cutting head, tail, edge and multi-pass straightening, leveling and other finishing lines, it is then cut or recoiled to become: hot-rolled steel plate, flattened hot-rolled steel coil, longitudinal Cutting and other products. If the hot-rolled finishing coils are pickled to remove scale and oiled, they will become hot-rolled pickled coils.
Post time: Jun-14-2023