production process of stainless steel seamless pipe
Stainless steel seamless pipe production process Brief description:
1, the shortage of pipe (tube): the production of stainless steel round tube material used as a waste pipe.
2, cut pipe: the production of stainless steel tube when the head and tail need to be removed, including the feeding of the two at the end of the flat pipe, the middle of the cut off and finished products cut. In the cutting of steel pipe will produce steel scrap.
3, pickling, to the oil: the surface of the stainless steel tube due to high temperature heating produced after the removal of iron oxide skin, so as to achieve the requirements of steel production and finished product requirements. Engineering acid for the mixed acid (HNO3 + HF).
4, inspection grinding: stainless steel seamless steel pipe defects to check grinding, the defect to remove the negative clean.
5, cold drawing (rolling): the deformation of the steel pipe to achieve the required specifications, the production of different specifications of the steel pipe to go through a number of times back and forth pickling, solution treatment.
6, solid solution: stainless steel seamless tube after cold drawing (rolling) produced a metal processing hardening. In order to eliminate the work hardening to facilitate re-processing, therefore, through the solution treatment to restore its broken grain. At the same time, but also on the finished steel pipe to ensure the mechanical properties.
7, straightening: after solid solution (annealing) after the steel pipe due to thermal deformation of steel pipe bending, in order to achieve the straightness of steel pipe straight pipe to straighten the pipe.
8, lubrication: steel pipe in the cold drawing before processing, in order to deformation in the process of steel and extinction die metal does not directly produce friction, and thus in the steel pipe inside and outside the surface coated with a layer of high temperature nano-fat + lime prepared from the lubrication The agent is dried to form a barrier layer.
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