Cold-drawn and cold-drawing the distinction
That cold-drawing is not the case of heating of metals used to build cold-drawing machine drawing, advantage is not at a high temperature, the drawback is that the larger the residual stress, and should not pull too cold drawing can improve toughness and anti - tensile strength better mechanical properties.
Cold-drawn (rolled) seamless steel pipe flow: the round tube perforation → heating → → → head → pickling → Tu annealing oil (copper) → multi-pass cold drawing (cold) → billet tube straightening → heat treatment → → hydraulic test (testing) → inbound → tag.
Cold-drawn and cold-drawing the distinction:
Cold-drawn and cold-drawing cold metal of the two different methods, the two are not a concept. Cold-drawn metal material means to exert tension on both ends so that the tensile deformation of the material generated method; cold drawing is defined as material to exert pulling force on one end so that material through a die hole and pull-out method, die aperture to be more smaller diameter material. Cold-drawing process so that the material has the tensile deformation apart from but also have a squeeze deformation, cold-drawing process in general should be in a special cold-drawing machine. By cold-drawing process of materials than by the cold-drawn materials processing performance better.