Features of Formation of the Structure and Properties of Chromium Corrosion-Resistant Steels Alloyed with Nitrogen

摘要

Chromium corrosion-resistant steels alloyed with nitrogen are studied by experiment. It is shown that depending on chemical composition and production parameters the steel's structure may be martensitic with a minimum residual austenite content, martensitic with a higher residual austenite content, or threephase consisting of martensite, residual austenite, and ferrite. The possibility is demonstrated of residual austenite transformation into martensite during cooling after tempering at 400A degrees C, which leads to an increase in steel hardness and correspondingly strength.