Cold drawn seamless steel tube

So-called cold drawn, that is, without heating for seamless steel tube and cold drawing machine long pull, the advantage is not under the high temperature, the disadvantage is that residual stress is larger, and not pull out too long cold drawing can improve the toughness and tensile strength to get good mechanical properties.Cold dial the seamless steel tube in addition to general steel tube, low medium pressure boiler pipe, high pressure boiler tube, alloy steel, stainless steel pipe, oil cracking pipe, steel pipe, other include carbon thin wall steel tube, alloy thin wall steel pipes, thin-walled stainless steel tube, steel tube.Cold rolled to heat treatment state delivery.
 

Cold drawing (rolling) seamless steel tube production and processing process: the round tube billet - heat - punch to heading, annealing and pickling to apply oil (copper), multi-channel time cold drawing (cold rolled) to the tube billet - heat treatment - straightening, hydrostatic test (NDT) - tag to put in storage.

Difference between cold drawing and cold drawn seamless steel pipe:
Cold drawing and cold drawn seamless steel tube of cold working in two different ways, the two are not a concept.Cold drawn in applying pull the ends of the seamless steel tube material, make the seamless steel tube material produces tensile deformation method;One end of the cold drawing refers to the material pulling force, make the seamless steel tube material method, is pulled through a die opening and mold the diameter of the aperture to the material.


Cold drawing processing makes the material in addition to the tensile deformation and extrusion deformation, cold drawing process will make the special cold drawing machine.Manufactured by cold drawing of seamless steel tube material than the cold-drawn processing performance better.