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《Materials for Mechanical Engineering》 2013-10
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Hot Deformation Behavior and Thermal Processing Map of a High-Chromium Bearing Roller Steel

HUO Lian-zhe;BAI Xing-hong;SUN Li-kun;SHAO Kui-xiang;China First Heavy Industries Stock Company;  
The thermal deformation mechanical behavior and recrystallization law of a high-chromium bearing roller steel were studied in a hot compression test in which the strain rates were 0.01-10s-1 and the deformation temperatures were 950-1 200 ℃,using Gleeble-3500thermal/power simulation test machine.The thermal processing map was drawn based on dynamic materials model.The results show that the thermal deformation equation could be described asε=1.0×1018[sinh(0.008 3σ)]5.78 exp[-481 363/(RT)],and the thermal deformation activation energy was 481.363 kJ·mol-1.The best deformation conditions of combination of temperature and stain rate were 1 045-1 170℃,0.01-0.3s-1and 1 165-1 200℃,1-10s-1.The deformation mechanism was dynamic recrystallization,and the energy dissipation rate was more than 29%.
【CateGory Index】: TG142.15
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