Martensitic transformation is a kind of cutting deformation core, not depending on diffusion. It’s an incomplete transformation. 1.Austenite must have enough cooling rate at high temperature, so that austenite will not undergo equilibrium decomposition at high temperature. 2.When austenite is cooled to MS point, martensitic transformation will take place, and it is formed by cooling.… Read more Using industrial freezer to reduce and eliminate the generation of retained austenite after quenching