There are three functions of solid solution treatment of stainless steel pipe fittings.
1. Make the organization and composition of the steel pipe uniform, which is particularly important for raw materials, because the rolling temperature and cooling rate of each section of the hot-rolled wire rod are different, resulting in inconsistent organization. At high temperature, atomic activity is enhanced, the σ phase is dissolved, the chemical composition tends to be uniform, and a uniform single-phase structure is obtained after rapid cooling.
2. Eliminate work hardening and facilitate continued cold processing.
Stainless steel pipe fittings
Through solid solution treatment, the distorted lattice is restored, the elongated and broken grains are recrystallized, the internal stress is eliminated, the tensile strength of stainless steel pipe fittings is reduced, and the elongation is increased.
3. Restore the inherent corrosion resistance of stainless steel.
Due to the precipitation of carbides and lattice defects caused by cold processing, the corrosion resistance of stainless steel is reduced. After solid solution treatment, the corrosion resistance of stainless steel pipe fittings is restored to a good state. For stainless steel pipe fittings, the three elements of solid solution treatment are temperature, holding time and cooling rate. The solid solution temperature is mainly determined according to the chemical composition.
304 Stainless Steel Heat exchanger Tube
