Research on Manufacturing Process for Seamless S22053 Duplex Stainless Steel Tube

Analyzed here in the essay are the hot workability and cold work characteristics of the S22053 duplex stainless steel. Also studied is the effect by the solution temperature on its microstructure, mechanical properties and corrosion resistance. Accordingly the processes of hot work, cold-rolling deformation and solution treatment for massive production of the seamless S22053 duplex stainless steel billet are worked out. It is regarded via the analysis that the heating temperature for the said billet has to be properly controlled within the range of 1 100~1 120℃, and the billet should not stay for a long time in the zone of the σ phase precipitation temperature;meanwhile the after-pierced shell has to be rapidly cooled;the deformation amount of the cold rolling (drawing) need not to be too big;and when the solution temperature is within the range of 1 050~1 100℃, the two phase ratio of the stainless steel is properly balanced, and thus its resistance against chloride pot corrosion is high.