There are many annealing typefor Cast Iron Surface Plate, such as stress relief annealing, recrystallizationannealing, spheroidizing annealing, full annealing, etc. The purpose ofannealing process is to reduce the hardness of metal materials, to improve theplasticity, contributing to cutting and pressure machining process. It alsocan  reduce the residual stress, improvethe organization and composition of the homogenization.

2. Stress relief annealingfor Cast Iron Surface Plate.

Stress relief annealing ,also called low temperature annealing or high temperature annealing, which isgenerally used to eliminate the residual stress in castings, forging, welding,rolling, cold drawing workpieces.