Solution treatment: a heat treatment process
22 November 2019
Solution treatment refers to a heat treatment process in which the alloy is heated to a high temperature single-phase zone to maintain the temperature, and the excess phase is sufficiently dissolved in the solid solution and then rapidly cooled to obtain a supersaturated solid solution.
Because the operation process is similar to quenching, it is also called “solution hardening”. It is suitable for alloys in which the solid solution is used as a matrix and the solubility changes greatly when the temperature changes. It is generally a preliminary heat treatment and its role is to prepare optimum conditions for subsequent heat treatment.
The forming process of the bellows is a process in which the substrate undergoes plastic deformation, which causes the structural material to undergo loading and unloading in the plastic range. Therefore, the performance of the structural material has undergone a great change, which is called the hardening phenomenon. Generally, after the bellows is formed, the yield strength of the material is doubled.
The solution treatment can only eliminate the residual stress generated during the welding process of the bellows.