Effect of austenitizing temperature on the mechanical properties of high-strength maraging steel

This paper investigates the effect of austenitizing temperature on mechanical properties of X00CrNiCoMo9-9-5-3 corrosion resistant maraging steel. The results show that solution treatment recrystallization temperature of this experimental steel is 850 °C. After a solution treatment below 850 °C, the experimental steel will change to form austenite via the non-dispersive phase transition from α′ to γ, which inherits the forging structure high density defects. Then the experimental steel can cool to form high strength martensitic steel. Moreover, high hardness austenite increases the resistance to phase transition in the cooling process and increases the content of retained austenite, thus guaranteeing excellent low temperature toughness of maraging steel.