Features of Titanium Carbide Precipitation in Low-Carbon High-Strength Steels Microalloyed with Titanium and Molybdenum

Low-Carbon Ti-Mo Microalloyed Hot Rolled Steels: Special Features of the Formation of the Structural State and Mechanical Properties

“…In studies of Ti-Mo microalloyed steels, "austenitic" carbonitride precipitates were not detected [9] or were observed in very small amounts [10]. This led to the intensive formation of interphase precipitates.…”

“…Table 2 summarizes information on the mechanical properties of various studied Ti-Mo microalloyed steels and the corresponding parameters of hot rolling: finishing temperature of rolling (T f ) and coiling temperature (T c ), as well as the cooling rate from T f to T c (V c ). For the compositions studied in [9,10,39,[65][66][67], the values of T f and T c corresponding to the highest tensile and yield strengths were selected. It can be seen that the titanium content is from 0.09 to 0.233 wt.%, and molybdenum is usually 0.19-0.22 wt.%, in some cases up to 0.43 wt.%.…”

“…In [10], a theoretical analysis was carried out for the kinetics of TiC precipitation from austenite at 900 and 850 • C for two steels (Table 2) differing in titanium content (wt.%): 0.070C-0.22Mo-0.090Ti (No. 9) and 0.063C-0.21Mo-00.096Ti (No.…”

“…7 (Table 2) increased due to a decrease in the average size of carbide 2) Reprinted with permission from Ref. [10]. Copyright 2021 Metallurgizdat.…”

“…The cooling process after hot rolling and during coiling of the strip largely controls the main changes in the microstructure of the metal, the transformation of austenite into ferrite, and the formation of phase precipitates. The influence of T f , T c , and the cooling rate of rolled products from T f to T c on the structural state and mechanical properties has been studied in a number of works [9,10,39,41,65,67].…”