The role of high-precision cold-drawn tube solution treatment:
1. Make the structure and composition of the high-precision cold-drawn tube uniform, which is very important for the raw materials, because the rolling temperature and cooling rate of each section of the hot-rolled tube are different, resulting in a different organizational structure. At high temperatures, the atomic activity increases, the σ phase dissolves, the chemical composition tends to be uniform, and a uniform single-phase structure is obtained after cooling.
2. Eliminate work hardening to facilitate continued cold working. Through the solution treatment, the distorted lattice is restored, the elongated and broken grains are recrystallized, the internal stress is eliminated, the tensile strength of the steel wire decreases, and the elongation increases.
3. Restore the inherent corrosion resistance of high-precision cold drawn tubes. The precipitation of carbides and lattice defects due to cold working reduce the corrosion resistance of high-precision cold drawn tubes.