锻压技术

大型封头热成形晶粒分布的模拟研究

英文标题：Simulation study on grain distribution in hot forming for large-scale head

作者：安红萍武建国刘俐利

单位：太原科技大学

分类号：TG316

出版年,卷(期):页码：2023,48(11):7-14

摘要：

晶粒大小和分布状态是影响大型锻件服役性能的关键因素，为了探索热变形结束后非均匀变形与晶粒分布的关系，针对核电压力容器用大型高法兰厚壁封头的热拉深成形进行了模拟分析。基于统计学概念，采用变异系数对封头内的应变及晶粒的非均匀分布程度进行了表征和分析，并建立了直观的应变及晶粒状态分区图。在此基础上，确定了应变变异系数与晶粒变异系数之间的函数关系，并结合大型封头的成形过程，从金属流动和组织演变角度讨论了该函数的合理性。研究结果对控制锻件性能、提高产品质量具有一定的参考意义。

Grain size and distribution are key factors affecting the service performances of large-scale forgings. Therefore, in order to explore the relationship between non-uniform deformation and grain distribution after hot deformation, the hot drawing of large-scale high-flange thick-walled heads for nuclear power pressure vessels was simulated and analyzed. Then, based on statistical concepts, the degree of non-uniform distribution of strain and grain in the head was characterized and analyzed by the variation coefficient, and the intuitive strain and grain state zoning diagram were established. On this basis, the functional relationship of the variation coefficients between strain and grain was determined, and combined with the large-scale head forming process, the rationality of this function was discussed from the perspective of metal flow and microstructure evolution. Thus, the research results provide certain reference for controlling the performances of forgings and improving the quality of products.

基金项目：

山西省自然科学基金重点项目（201601D011002）;上海电机学院上海大件热制造工程技术研究中心开放课题（18DZ2253400）;太原科技大学博士科研启动基金项目（20212028）

作者简介：安红萍（1973-)，女，博士，副教授,E-mail：ellanfei@126.com

参考文献：

[1]陈学东，范志超，崔军，等.我国压力容器高性能制造技术进展[J].压力容器,2021,38(10):1-15.

Chen X D, Fan Z C, Cui J, et al. Progress in high-performance manufacturing technology for pressure vessels in China [J]. Pressure Vessel Technology, 2021, 38（10）:1-15.

[2]李向，凌进，张智峰．核电容器用大锻件制造技术的发展[A].中国核学会2013年学术年会论文集[C].哈尔滨，2013.

Li X，Ling J，Zhang Z F. The development of manufacturing technology of heavy forgings for nuclear power vessel[A]. The Proceedings of Chinese Nuclear Society Annual Conference 2013[C]. Harbin, 2013.

[3]任杰，葛苏，胡朝备，等.大型核电水室封头近净锻造新工艺[J].塑性工程学报，2022，29 (5):31-38.

Ｒen J，Ge S, Hu C B，et al.New near net forging process of large nuclear power water chamber head[J]. Journal of Plasticity Engineering，2022，29 (5): 31-38.

[4]曹晨思，段红玲，李雪龙. 2.25Cr-1Mo-0.25V 钢大型压力容器封头均质性研究[J]. 大型铸锻件，2022, (1): 16-19.

Cao C S, Duan H L，Li X L. Study on the homogeneity of 2.25Cr-1Mo-0.25V steel large pressure vessel head[J]. Heavy Casting and Forging, 2022,（1）:16-19.

[5]陈飞，朱华佳，李佳航，等.大锻件非连续热变形组织演变宏微观模拟[J]. 塑性工程学报，2020，27 (5): 41-52.

Chen F，Zhu H J，Li J H，et al.Macro and micro simulation of microstructure evolution in discontinuous thermal deformation of large forging parts[J].Journal of Plasticity Engineering，2020，27 (5): 41-52.

[6]刘助柏,倪利勇,刘国辉.大锻件形变新理论新工艺[M]. 北京：机械工业出版社，1996.

Liu Z B, Ni L Y, Liu G H. New Theroy and Processes of Heavy Forgings Deformation[M]. Beijing:China Machine Press,1996.

[7]陈学文，王继业，杨喜晴，等.Cr8合金钢热变形行为及位错密度演变规律[J].吉林大学学报:工学版,2020,50(1):91-99.

Chen X W，Wang J Y，Yang X Q，et al. Hot deformation behavior and dislocation density evolution regularity of Cr8 alloy[J]. Journal of Jilin University: Engineering and Technology Edition, 2020, 50(1): 91-99.

[8]Humphreys F J, Hatherly M. Recrystallization and Related Annealing Phenomena[M]. Oxford:Elsevier Ltd., 2004.

[9]Chen F, Cui Z S, Chen S J. Recrystallization of 30Cr2Ni4MoV ultra-super-critical rotor steel during hot deformation. Part I: Dynamic recrystallization[J]. Materials Science and Engineering：A, 2011, 528(15):5073-5080.

[10]Beynon J H, Sellars C M. Modelling microstructural and its effects during multipass hot rolling[J]. ISIJ International, 1992, 32(3):359-367.

[11]Lenard J G, Pietrzyk M, Cser L. Mathematical and Physical Simulation of the Properties of Hot Rolled Products[M]. Oxford: Atony Rowe Ltd.,1999.

[12]孙志仁，孔德磊，雷丽萍. 大型轴类锻件典型锻造工艺微观组织模拟[J]. 锻压技术，2021，46（6）：33-40.

Sun Z R, Kong D L, Lei L P. Microsturcture simulation of typical forging process for large shaft forgings[J]. Forging & Stamping Technology,2021,46(6):33-40.

[13]孙静娟.统计学[M].北京：清华大学出版社，2006.

Sun J J. Statistics[M]. Beijing: Tsinghua University Press,2006.

[14]王晓青. 地震前兆群体空间非均匀性指标Cv值及其应用问题探讨[J]. 地震，2004，24（4）：126-129.

Wang X Q. Discussion on application of spatial inhomogeneity parameter Cv to identification of earthquake precursor group[J]. Earthquake, 2004, 24(4):126-129.

[15]王晓青，陈学忠，李志雄，等.地震前兆群体空间非均匀性指标Cv值研究[J]. 中国地震，1999，15（3）：199-209.

Wang X Q，Chen X Z，Li Z X，et al.Research on the spatial inhomogeneity parameter Cv of earthquake precursory group[J].Earthquake Research in China,1999，5（3）：199-209.

[16]GB/T 6394—2017，金属平均晶粒度测定方法[S]

GB/T 6394—2017，Determination of estimating the average grain size of metal [S].

[17]GB/T 24177—2009，双重晶粒度表征与测定方法[S].

GB/T 24177—2009，Standard test methods for characterizing duplex grain sizes[S].

[18]周璇，王克鲁，鲁世强，等. 加工参数对Ti2041合金热变形行为及组织演变的影响[J].稀有金属,2022,46(5):554-563.

Zhou X, Wang K L, Lu S Q, et al. Hot deformation behavior and microstructure evolution of Ti2041 alloy with processing parameters[J]. Chinese Journal of Rare Metals，2022,46(5):554-563.

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