Structure of a Cast High-Strength Corrosion-Resistant 05Kh20AG10N3MF Austenitic Steel Containing 0.40 or 0.53% Nitrogen

摘要

The phase composition and fine structure of a high-strength corrosion-resistant 05Kh20AG1ON3MF austenitic steel containing 0.40 or 0.53% N are studied by X-ray diffraction and electron microscopy. In the as-cast state, this steel has a structure containing austenite, 6 ferrite, and dispersed CrV(C, N) carbonitrides. The δ ferrite is represented by layers between austenite grains, the dislocation density in which is lower than in the δ ferrite. After quenching from 1100, 1150, and 1200℃, the structure of the steel with 0.53% N has no 6 ferrite and the structure of the steel with 0.40% N has a low 6-ferrite content and x-phase precipitates.