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For stainless steel seamless pipes, the three elements of solid solution treatment are temperature, holding time and cooling rate. What are the functions of solid solution of stainless steel seamless pipe?
1. The uniform structure and composition of the stainless steel seamless tube are uniform, which is especially important for the raw materials, because the rolling temperature and cooling rate of the hot rolled pipes are different, and the structure is not consistent. At high temperatures, the atomic activity intensifies, and the chemical composition tends to be homogeneous. After rapid cooling, uniform single-phase structure is obtained.
2, eliminate work hardening to facilitate continuous cold processing. Through solution treatment, the distorted lattice is recovered, the elongated and broken grains recrystallized, the internal stress was eliminated, the tensile strength of stainless steel decreased, and the elongation increased.
3. Restore the inherent corrosion resistance of stainless steel seamless pipes. The corrosion resistance of stainless steel seamless pipe decreases due to the precipitation of carbide and the lattice defects caused by cold working. The corrosion resistance of stainless steel seamless pipes after solution treatment has been restored to the best condition.