What mould do you use for cold drawn stainless steel wire?. How to deal with before cold drawing?
The so-called cold drawing, that is, in the case of non heating metal cold drawn machine pulling long, the advantage is not in high temperature, the disadvantage is that the residual stress is greater, and can not pull out too longHot rolling is made of slabs (mainly continuous billets) as raw materials. After heating, strips are made from roughing mills and finishing mills. From the last finishing mill stand out of the hot strip laminar cooling through to the set temperature, the coiling machine rolled strip steel roll cooled, according to the different needs of users with different finishing line (flat, straightening, transverse or longitudinal, inspection, weighing, packing and marking etc.) processing and become steel, flat steel product volume and slitting.
Overview of two processes:Hot-rolled (extrusion seamless pipe): billet, heating, perforation, three roll cross rolling, rolling or extrusion, tube to tube diameter (or reducing) - cooling - tube, straightening, pressure test (or testing), marking and warehousing.Cold drawing (rolling) seamless steel pipe: round tube to heating to perforation, annealing, pickling, leading to oil (copper), multi pass drawing (Leng Zha), the blank pipe, heat treatment, straightening, pressure test (testing), marking and warehousing.
A simple, a billet after heating (TV is that burning red hot steel block) refined over several rolling cut edge correction plate become, this is called hot.
