The Increase of Fracture Toughness with Solution Annealing Temperature in 18Ni Maraging 300 Steel

Abstract Maraging steels are a class of ultra high strength special importance due to their extremely mechanical and good toughness. In this work, the effects solution annealing temperature on properties maraging 300 were evaluated, in order maximize toughness without considerable detriment strength. Five temperatures evaluated. The characterization was done by tests Rockwell C hardness, Charpy-V impact toughness, tensile fracture plane strain. results obtained show that increases, decreases with annealing. way it possible find heat treatment condition which raise about 20% loss only 6%