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The role of solution treatment of stainless steel seamless pipe
- Mar 19, 2018 -

1: Make the stainless steel seamless pipe structure and composition uniform, which is particularly important for raw materials, because the rolling temperature and cooling speed of the hot rolled pipe sections are not the same, resulting in inconsistent organizational structure. At high temperature, the atomic activities increase, the σ phase dissolves, the chemical composition tends to be uniform, and a uniform single-phase structure is obtained after rapid cooling.

2: Elimination of work hardening to facilitate continued cold processing. Through solution treatment, the twisted lattice recovers, the elongated and broken grains recrystallize, the internal stress is eliminated, the tensile strength of the steel wire decreases, and the elongation increases.

3: Restore the inherent corrosion resistance of stainless steel tubes. Due to cold processing, carbide precipitation and lattice defects make the corrosion resistance of the stainless steel pipe decrease, and the corrosion resistance of the stainless steel seamless pipe after the solution treatment recovers to the best state.