Structure Changes of High-Strength Economically Alloyed Steel 09KhGN2MD (09CrMnNi2MoCu) In Tempering

详细

The purpose of the present investigation is to determine the heat treatment parameters that ensure yield strength over 690 MPa in combination with toughness of at least 35 J/cm² at temperature of –70°C in new economically alloyed cold-resistant steel. The effect of various quenching and tempering parameters on mechanical properties, structure of steel, and fracture mode of samples after impact tests at temperature of –70°C has been studied. The relationship between the properties, structure, and fracture mode of steel samples is shown. The heat treatment parameters of the investigated steel are determined.