R&D of Super Duplex Stainless Steel Coil for Deep-sea Umbilical Cable
Based on the requirements of the mechanical properties and pitting-corrosion resistance of the high per-formance super austenitic ferrite duplex stainless steel for underwater manifold of deep-sea umbilical cable,the alloy com-position is designed and optimized.Adopting AOD furnace with Al deoxidation-calcium treatment and off-furnace refining,the key technologies for adjustment and control of integrated cold deformation of hot piercing-high temperature intermediate solution treatment,deformation and distribution are proposed.After hot piercing.As a result the high-performance S32750 super austenitic ferrite duplex stainless steel seamless pipe for deep-sea manifold service as produced with the abovemen-tioned processes possesses rather high mechanical properties and excellent pitting-corrosion resistance,having met the applicable specification of deep-sea oil and gas production and been adaptable to the deep sea service in the harsh sea-water medium environment.
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维普
