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Tempering Effects on the Stability of Retained Austenite and Mechanical Properties in a Medium Manganese Steel

机译:回火对中锰钢中残余奥氏体稳定性和力学性能的影响

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摘要

Tempering effects on the austenite stability and mechanical properties of 0.2C-5Mn steel were investigated in the temperature range from 100℃ to 600℃ with 1 hour. It was found that tempering doesn't result in a significant change of the austenite plus ferrite duplex structure, which was developed in the previous annealing through austenite reverted transformation, whereas significant decreasing of the austenite fraction and carbon concentration was found in the specimens tempered at 200℃ and 500℃ due to the precipitation of carbides. Correspondingly tempering slightly deteriorates the ductility when the specimens were tempered at 200℃ and 500℃ without effects on mechanical properties around 400℃. Based on the analysis of relationship between mechanical properties and retained austenite, it was found that the product of tensile strength to total elongation (Rm~*A_T) was strongly dependent on the product of the volume fraction and carbon concentration of retained austenite (f_A*C_γ). Furthermore, the optimal mechanical properties with tensile strength 1 000 Mpa and total elongation 40% could be obtained after tempering at 400℃ with 1 hour, which means that galvanization is feasible in the 0.2C-5Mn steel with ferrite and austenite duplex structure.
机译:在100℃至600℃的温度范围内,在1小时内研究了回火对0.2C-5Mn钢奥氏体稳定性和力学性能的影响。发现回火不会导致奥氏体加铁素体双相结构的显着变化,这是在先前的退火过程中通过奥氏体回复相变而形成的,而在回火后的试样中发现奥氏体分数和碳浓度显着降低。 200℃和500℃由于碳化物的析出。相应地,回火在200℃和500℃回火时略微降低了延展性,而对400℃左右的力学性能没有影响。通过分析力学性能与残余奥氏体之间的关系,发现抗拉强度与总伸长率的乘积(Rm〜* A_T)很大程度上取决于残余奥氏体的体积分数和碳浓度的乘积(f_A * C_γ)。此外,在400℃回火1小时后,可以获得抗拉强度为1000 Mpa,总伸长率为40%的最佳机械性能,这意味着在具有铁素体和奥氏体双相结构的0.2C-5Mn钢中镀锌是可行的。

著录项

  • 来源
    《ISIJ international》 |2012年第5期|p.868-873|共6页
  • 作者单位

    School of Materials Science and Engineering, State Key Laboratory of Material Processing and Die & Mould Technology,Huazhong University of Science and Technology, Wuhan, Hubei, 430074 P. R. China National Engineering Research Center of Advanced Steel Technology (NERCAST), Central lron and Steel Research Institut(ClSRl), Beijing, 100081 P. R. China;

    School of Materials Science and Engineering, State Key Laboratory of Material Processing and Die & Mould Technology,Huazhong University of Science and Technology, Wuhan, Hubei, 430074 P. R. China National Engineering Research Center of Advanced Steel Technology (NERCAST), Central lron and Steel Research Institut(ClSRl), Beijing, 100081 P. R. China;

    National Engineering Research Center of Advanced Steel Technology (NERCAST), Central lron and Steel Research Institut(ClSRl), Beijing, 100081 P. R. China;

    National Engineering Research Center of Advanced Steel Technology (NERCAST), Central lron and Steel Research Institut(ClSRl), Beijing, 100081 P. R. China;

    National Engineering Research Center of Advanced Steel Technology (NERCAST), Central lron and Steel Research Institut(ClSRl), Beijing, 100081 P. R. China;

    School of Materials Science and Engineering, State Key Laboratory of Material Processing and Die & Mould Technology,Huazhong University of Science and Technology, Wuhan, Hubei, 430074 P. R. China;

    National Engineering Research Center of Advanced Steel Technology (NERCAST), Central lron and Steel Research Institut(ClSRl), Beijing, 100081 P. R. China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    microstructure; mechanical properties; TRIP effect; austenite fraction; tempering;

    机译:微观结构机械性能TRIP效果;奥氏体分数回火;
  • 入库时间 2022-08-18 00:01:36

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