The manufacturing steps of stainless steel seamless pipe mainly include the following core links: smelting, ingot, rolling, sawing, peeling, piercing, annealing, pickling, cold drawing, cutting head, pickling and storage. These steps ensure the quality and production efficiency of stainless steel seamless pipes.
Specifically, the manufacturing steps of stainless steel seamless pipes are as follows:
Smelting and steel ingot: First, the raw material is smelted into steel ingot, which is the basis for manufacturing stainless steel seamless pipes.
Steel rolling and sawing: the ingot is rolled by the rolling mill into a certain specification of billet, and then sawed to obtain a certain length of billet .
Peeling: The billet is peeled to remove the surface oxidation layer and defects.
Perforation: the blank is perforated by the perforating machine to form the preliminary shape of the steel pipe.
Annealing and pickling: The perforated steel pipe is annealed to remove stress and then pickled to remove surface oxides.
Cold-drawing and multi-pass processing: The steel pipe is cold-drawn and cold-rolled in multiple passes to achieve the required size and accuracy.
Straightening and cutting: The straightening machine straightens the steel pipe to ensure its straightness, and then the cutting treatment is carried out to remove the unqualified part at both ends.
Pickling and storage: Finally, the steel pipe is pickled again to remove residual oxides, and then stored for use.
Together, these steps constitute the manufacturing process of stainless steel seamless tubes, ensuring the quality and performance of the product.
