Influence of Tempering on the Microstructure and Mechanical Properties of HSLA-100 Steel Plates
作者： S. K. Dhua , D. Mukerjee , D. S. Sarma
DOI: 10.1007/S11661-001-0201-Z
关键词: Martensite 、 Charpy impact test 、 Microalloyed steel 、 Composite material 、 Metallurgy 、 Austenite 、 Materials science 、 Lath 、 Quenching 、 Tempering 、 Ultimate tensile strength
摘要: The influence of tempering on the microstructure and mechanical properties HSLA-100 steel (with C-0.04, Mn-0.87, Cu-1.77, Cr-0.58, Mo-0.57, Ni-3.54, Nb-.038 pct) has been studied. plate samples were tempered from 300 °C to 700 for 1 hour after austenitizing water quenching. transmission electron microscopy (TEM) studies as-quenched revealed a predominantly lath martensite structure along with fine precipitates Cu Nb(C, N). A very small amount retained austenite could be seen in boundaries quenched condition. Profuse precipitation noticed at 450 °C, which enhanced strength significantly (yield (YS)—1168 MPa, ultimate tensile (UTS)—1219 MPa), though cost its notch toughness, dropped 37 14 J 25 −85 respectively. became considerably coarsened elongated 650 resulting phenomenal rise impact toughness (Charpy V-notch (CVN) 196 149 J, respectively, °C) expense YS UTS. best combination obtained 600 (YS-1015 MPa UTS-1068 88 °C).
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