STUDY OF THE PHASE COMPOSITION OF A MODEL CEMENTED LAYER OVER THE DEPTH OF SAMPLES FROM ELECTRICAL STEEL 10880

10.25712/ASTU.1811-1416.2023.02.013

Abstract

10880 steel carburization is carried out using solid carburizer at 930°C with quenching into water and with slow cooling. Carburized shift up to 800 µm is examined by optic metallography and quantitative X-ray phase analysis using Co and Ag monochromatic radiation. Transversal section analysis and X-ray phase analyses after step removing of 50-150 µm of quenched material surface layers show that phase composition is as follows: martensite prevalence in surface shift, general decreasing of austenite share with depth, with its absolute maximum at about 100 µm and local maximum at 240 µm depth. Ferrite volume share increases while depth goes up. Moreover, in slow cooled samples cementite volume share is significant, while in quenched samples it wasn’t observed at all.