李露,周旭东,陈学文,吕红英,张建,高全德

• 1:河南科技大学材料科学与工程学院
• 2:河南中原特钢装备制造有限公司

摘要(Abstract)：

在Gleeble-1500D热模拟试验机上,利用膨胀法测定了PCrNi3MoV钢在不同冷却速度下过冷奥氏体连续冷却时的膨胀曲线。采用切线法获得了其相转变点,用Origin软件绘制PCrNi3MoV钢过冷奥氏体连续冷却相转变曲线(CCT曲线)。结果表明:PCrNi3MoV钢的临界点:A_(c1)和A_(c3)分别为720℃和850℃;M_s和M_f分别为300℃和160℃。对于过冷奥氏体,当冷却速度较慢时,如0.05～0.07℃/s时主要发生铁素体、贝氏体和马氏体转变;而冷却速度中等时,如0.1～1℃/s时发生贝氏体和大量马氏体转变;当冷却速度较大时,如50℃/s时只发生马氏体转变。随着冷却速度的增加,维氏硬度从500 HV迅速增加,当冷速大于1℃/s以后趋于平稳并达到800 HV。

关键词(KeyWords)： PCrNi3MoV钢;热模拟;CCT曲线;膨胀法

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51575162)

作者(Author): 李露,周旭东,陈学文,吕红英,张建,高全德

DOI: 10.13289/j.issn.1009-6264.2019-0348

参考文献(References)：

• [1] 罗庆民.稀土对PCrNi3MoV钢的作用[J].湖南冶金,1997(2):20-22.LUO Qing-min.Effect of rare earth on PCrNi3MoV steel[J].Hunan Metallurg,1997(2):20-22.
• [2] Jiang M L,Yu W.Study on continuous cooling transformation and microstructure of 500 MPa grade steel for railway freight car body[J].Materials Science Forum,2019,944:272-277.
• [3] 吕红英,周旭东,陈学文.QP980钢CCT曲线的测定[J].材料热处理学报,2018,39(4):139-144.Lü Hong-ying,ZHOU Xu-dong,CHEN Xue-wen.Determination of CCT curve of QP980 steel[J].Transactions of Materials and Heat Treatment,2018,39(4):139-144.
• [4] Wang W,Song R B,Peng S G,et al.Principle and model of phase transformation in Ultra-High strength steel for cone crusher[J].Materials Science Forum,2016,850:636-641.
• [5] Kang H C,Park B J,Jang J H,et al.Determination of the continuous cooling transformation diagram of a high strength low alloyed steel[J].Metals and Materials International,2016,22(6):949-955.
• [6] 秦炳雪,周旭东.SPCC钢CCT曲线测定与分析[J].热加工工艺,2017(2):89-91.QIN Bing-xue,ZHOU Xu-dong.Determination and analysis of CCT curve of SPCC steel[J].Hot Working Technology,2017(2):89-91.
• [7] Gomez M,Rancel L,Escudero E,et al.Phase transformation under continuous cooling conditions in medium carbon microalloyed steels[J].Journal of Materials Science and Technology,2014,30(5):511-516.
• [8] 龙松朋,周旭东,李汉.42CrMoA钢动态CCT曲线[J].热加工工艺,2013,42(2):66-68.LONG Song-peng,ZHOU Xu-dong,LI-Han.Dynamic CCT curve of 42CrMoA steel[J].Hot Working Technology,2013,42(2):66-68.
• [9] 徐光.金属材料CCT曲线测定及绘制[M].北京:化学工业出版社,2009.
• [10] 曾其英.钢中合金元素对相变点Ac1、Ac3影响的定量关系探讨[J].理化检验.物理分册,1982(5):47-49.ZENG Qi-ying.Discussion on the quantitative relationship between the influence of alloying elements in steel on phase transition points Ac1 and Ac3[J].Physical and chemical testing.Physical division,1982(5):47-49.
• [11] 任颂赞,张静江.钢铁金相图谱(精)[M].上海:沪科文献出版社,2005.
• [12] 段宝美,邓叙燕,李玲霞.30Mn2Cr钢连续冷却转变过程中组织及硬度演变规律的研究[J].热加工工艺,2018(4):114-118.DUAN Bao-mei,DENG Xu-yan,LI Ling-xia.Study on the evolution law of microstructure and hardness of 30Mn2Cr steel during continuous cooling transformation[J].Hot Working Technology,2018(4):114-118.
• [13] Li L Z,Wei H,Liao L L,et al.Continuous cooling phase transformation rule of 20CrMnTi Low-Carbon alloy steel[C].Materials Science Forum,2019,944:303-312.
• [14] 郭俊锋.等温热处理对C-Mn钢冷轧板组织与性能的影响[D].洛阳:河南科技大学,2015.GUO Jun-feng.Effect of isothermal heat treatment on microstructure and properties of C-Mn steel cold rolled sheet[D].Luoyang:Henan University of Science and Technology,2015.
• [15] Dong J,Liu C,Liu Y,et al.Isochronal phase transformation of Nb-V-Ti microalloyed ultra-high strength steel upon cooling[J].Fusion Engineering and Design,2017:S0920379617305690.
• [16] 白雅琼,李智丽.低碳贝氏体钢的过冷奥氏体连续冷却转变曲线[C]//张家界:中国金属学会低合金钢分会学术年会,2012.
• [17] Niu G,Chen Y L,Hui-Bin W U,et al.Effects of chromium,vanadium and austenite deformation on transformation behaviors of high-strength spring steels[J].Journal of Iron and Steel Research,2016,23(12):1323-1332.
• [18] 文九巴.材料科学与工程[M].哈尔滨:哈尔滨工业大学出版社,2007.

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