High-temperature mechanical properties of near-eutectoid steel
来源期刊：International Journal of Minerals Metallurgy and Materials2013年第9期
论文作者：Jun Fu Fu-ming Wang Fang Hao Gui-xiang Jin
文章页码：829 - 834
摘 要：The high-temperature mechanical properties of near-eutectoid steel were studied with a Gleeble-1500 simulation machine.Zero strength temperature（ZST）,zero ductility temperature（ZDT）,hot ductility curves,and strength curves were measured.Two brittle zones and one plastic zone were found in the temperature range from the melting point to 600℃.Embrittlement in zone I is caused by the existence of liquid flm along dendritic interfaces.Ductility loss in zone III mainly results from precipitates and inclusions as well as S segregation along grain boundaries.Pearlite transformation also accounts for ductility deterioration in the temperature range of 700-600℃.Moreover,the straightening temperature of the test steel should be higher than 925℃ for avoiding the initiation and propagation of surface cracks in billets.
Jun Fu1,2，Fu-ming Wang1,2，Fang Hao1,2，Gui-xiang Jin1,2
1. State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing2. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing
摘 要：The high-temperature mechanical properties of near-eutectoid steel were studied with a Gleeble-1500 simulation machine.Zero strength temperature（ZST）,zero ductility temperature（ZDT）,hot ductility curves,and strength curves were measured.Two brittle zones and one plastic zone were found in the temperature range from the melting point to 600℃.Embrittlement in zone I is caused by the existence of liquid flm along dendritic interfaces.Ductility loss in zone III mainly results from precipitates and inclusions as well as S segregation along grain boundaries.Pearlite transformation also accounts for ductility deterioration in the temperature range of 700-600℃.Moreover,the straightening temperature of the test steel should be higher than 925℃ for avoiding the initiation and propagation of surface cracks in billets.
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