Cementite coarsening during the tempering of Fe-C-Mn martensite

Effect of Annealing Process on Microstructure and Mechanical Properties in Microalloyed Medium Manganese Steel

“…[ 16 ] The increase in temperature would also result in the reduction of total interfacial energy and affect the areal number density of the cementite. [ 26 ] Figure 10d shows the distribution of element C of IA690‐50‐Q. The widely dispersion of C atoms was obtained at IA690‐50‐Q samples and the distribution of Mn was significantly changed by comparing with the experimental data.…”

Study on the microstructure and impact fracture behavior of martensitic alloy steels

“…In contrast, the light-colored regions in the tempered alloy steel were less than those of the untempered steel, which indicates that changes took place in martensite during the tempering process, or phase transformation occurred for the retained austenite. It is well known that, during the tempering of steels al-loyed with carbide-forming elements (e.g., Cr, Mn, and Mo), cementite can form with partitioning of these alloying elements, and the interlath film, such as retained austenite, decomposes into ferrite (α) and cementite (θ-Fe 3 C) [21][22][23]. In addition, the problem of segregation in the structure of steel after tempering was alleviated, and the uniformity of the steel improved.…”

Determinação Das Temperaturas De Transformação Ar1 E Ar3 Em Barras De Aço Ca-50 Laminadas a Quente / Determination of the Transformation Temperatures Ar1 and Ar3 for Hot Rolled Ca-50 Steel Rebars

“…The quenching heat treatment is a treatment applied for increase the steel hardness, due to Martensite microstructure formation [9]. Thus, knowing the expressive difference between the Ferrite (α) and Martensite (M), being that as greater the percentage of Martensite present in the microstructure, greater will be the steel hardness [10,11] Eleven steel specimens were prepared for the quenching heat treatment.…”