Effect of Thermomechanical Processing on the Microstructure and Mechanical Properties of Low Carbon Steel

Abstract

Keywords: Low carbon steel; fast cooling; the mechanical properties; standard requirement. Abstract. Effect of thermomechanical processing on the mechanical properties of low carbon cold forging steel was investigated for different processing parameters on a laboratory hot rolling mill. Fast cooling is a key factor in thermomechanical processing. The mechanical properties of specimen 2 which was fast cooled from high finish rolling temperature exceed the standard requirement of ML30 Steel. This is attributed to the presence of substantial amounts of pearlite. Finish rolling temperature also affects the mechanical properties of steels. Low temperature rolling results in the ferrite-grain refinement. The mechanical properties of the specimen 4 exceed the standard requirement of ML25 Steel.

High-Cycle, Low-Cycle, Extremely Low-Cycle Fatigue and Monotonic Fracture Behaviors of Low-Carbon Steel and Its Welded Joint

“…Thermo-mechanical controlled rolling is a controlled process, extending from slab reheating, via rolling, up to and including (accelerated) cooling and, where necessary, tempering. Rolling is performed in accordance with a defined rolling-pass schedule, with finish rolling in the non-recrystallised austenite [25,26]. The essential effect of thermo-mechanical controlled rolling is the attainment of the fine grain, this being the necessary basis for the combination of high mechanical strength and toughness with only low alloying-element contents.…”

“…Henceforth, the abbreviations BX and WX are used for the BM and WJ specimens, respectively, where X is the strain; for example, B0.5 is the BM specimen tested at 0.5% nominal strain. performed in accordance with a defined rolling-pass schedule, with finish rolling in the nonrecrystallised austenite [25,26]. The essential effect of thermo-mechanical controlled rolling is the attainment of the fine grain, this being the necessary basis for the combination of high mechanical strength and toughness with only low alloying-element contents.…”

Finite-Element Simulation of Steckel Mill Rolling

“…Due to the modern development of different variants of technological processes, such as normalized rolling, thermomechanical rolling, with all its varieties, the principles of which are the interaction, under certain conditions, between temperature and deformation, there are still questions about their integrated study and impact on the final products quality [24][25][26].…”