孙佳伟,陈学文,苏志毅,杨圳,徐栋栋,周正,刘铭阳,周旭东

• 1:河南科技大学材料科学与工程学院

摘要(Abstract)：

采用Gleeble-1500D型热模拟实验机进行SA-765 Gr.Ⅱ钢等温热压缩实验，压缩变形温度分别为1000、1050、1100、1150和1200℃,应变速率分别为0.005、0.01和1 s~(-1),最大压缩变形量为50%。基于热压缩变形过程的真应力-真应变数据，采用加工硬化率法和三次多项式拟合，求得不同变形条件下SA-765 Gr.Ⅱ钢的临界应力与临界应变，建立了关联Zener-Hollomon参数的动态再结晶临界应变模型。结果表明：变形温度和应变速率会极大地影响SA-765 Gr.Ⅱ钢的动态再结晶机制的启动，动态再结晶临界应变与变形温度成反比，与应变速率成正比。动态再结晶临界应变模型为：ε_c=0.201035Z~(0.000402),依据模型计算得到的临界应变预测值与实验值之间的相关系数达到了0.9765。

关键词(KeyWords)： 动态再结晶;Zener-Hollomon;临界应变模型;微观组织演变

Abstract:

Keywords:

基金项目(Foundation): 国家重点研发计划(2020YFB2008400);; 国家自然科学基金(51575162)

作者(Author): 孙佳伟,陈学文,苏志毅,杨圳,徐栋栋,周正,刘铭阳,周旭东

DOI: 10.13289/j.issn.1009-6264.2023-0369

参考文献(References)：

• [1] 乔士宾.SA508Gr.4N钢大锻件锻造过程组织演变与工艺优化[D].北京：钢铁研究总院，2021.QIAO Shi-bin.Microstructure evolution during forging process and forging process optimization for SA508Gr.4N steel heavy forgings[D].Beijing:Central Iron & Steel Research Institute,2021.
• [2] 齐珂.核电用钢316LN动态再结晶行为实验研究与数值模拟[D].上海：上海交通大学，2014.QI Ke.Experimental and numerical study on dynamic recrystallization of 316LN nuclear power steel[D].Shanghai:Shanghai Jiao Tong University,2014.
• [3] 王梦寒，李玉凤，徐志敏，等.基于微观组织演变模拟的大型饼类锻件质量控制[J].热加工工艺，2011,40(3):22-24.WANG Meng-han,LI Yu-feng,XU Zhi-min,et al.Quality control of large cake forging based on microstructure simulation[J].Hot Working Technology,2011,40(3):22-24.
• [4] 倪利勇，王傲冰.大型饼类锻件锻造工艺研究综述[J].大型铸锻件，2007(6):44-46.NI Li-yong,WANG Ao-bing.The research summarize on the forging technology of heavy disk-shaped forging[J].Heavy Casting and Forging,2007(6):44-46.
• [5] 李雪，高伟，宋现洲，等.核电异形管板锻件的锻造工艺研究[J].大型铸锻件，2015(4):37-38.LI Xue,GAO Wei,SONG Xian-zhou,et al.Research on forging process of nuclear power special-shaped tube sheet forgings[J].Heavy Casting and Forging,2015(4):37-38.
• [6] 曾志钦，李风雷，张卫文，等.核电用钢SA508Gr.4N两段式本构模型的建立及管板终锻火次模拟[J].锻压技术，2020,45(4):1-13.ZENG Zhi-qin,LI Feng-lei,ZHANG Wei-wen,et al.Establishment of two-stage constitutive model for SA508Gr.4N nuclear power steel and simulation of final forging for tube sheet[J].Forging & Stamping Technology,2020,45(4):1-13.
• [7] 王艳蕾.核电管板锻造工艺模拟研究[D].重庆：重庆大学，2012.WANG Yan-lei.Study on simulation of forging process for nuclear power tube plate[D].Chongqing:Chongqing University,2012.
• [8] 杜军毅，贾新胜.SA-765GrⅢ低温钢厚壁锻件封头成型温度研究[J].大型铸锻件，2014(6):16-20.DU Jun-yi,JIA Xin-sheng.Research on forming temperature of SA-765GrⅢ low-temperature steel thick wall forging head[J].Heavy Casting and Forging,2014(6):16-20.
• [9] 施熔刚，高强，闫修平，等.大型换热器SA765-Ⅱ管板的制造[J].热加工工艺，2012,41(19):133-135.SHI Rong-gang,GAO Qiang,YAN Xiu-ping,et al.Manufacturing process of large-scale heat exchanger SA765-Ⅱ tube sheet[J].Hot Working Technology,2012,41(19):133-135.
• [10] Arun Babu K,Mozumder Y H,Athreya C N,et al.Implication of initial grain size on DRX mechanism and grain refinement in super-304H SS in a wide range of strain rates during large-strain hot deformation[J].Materials Science and Engineering A,2022,832:142269.
• [11] 李俊儒，宋明强，张朝磊，等.超超临界机组叶片钢KT5331的热变形行为[J].材料热处理学报，2015,36(8):115-120.LI Jun-ru,SONG Ming-qiang,ZHANG Chao-lei,et al.Hot deformation behavior of blades steel KT5331 for ultra-supercritical units[J].Transactions of Materials and Heat Treatment,2015,36(8):115-120.
• [12] 陈文雄.单相和双相合金热变形及再结晶行为的微观机理研究[D].合肥：中国科学技术大学，2020.CHEN Wen-xiong.Study on microstructal mechanisms of hot deformation and recrystallization in single-phase and duplex alloys[D].Hefei:University of Science and Technology of China,2020.
• [13] Poliak E I,Jonas J J.A one-parameter approach to determining the critical conditions for the initiation of dynamic recrystallization[J].Acta Materialia,1996,44(1):127-136.
• [14] 王健，李全安，陈晓亚，等.Mg-8Al-1Zn-1Y镁合金动态再结晶临界条件及动力学模型的构建[J].材料热处理学报，2023,44(4):177-186.WANG Jian,LI Quan-an,CHEN Xiao-ya,et al.Dynamic recrystallization critical conditions and construction of kinetic model of Mg-8Al-1Zn-1Y magnesium alloy[J].Transactions of Materials and Heat Treatment,2023,44(4):177-186.
• [15] Fang B,Ji Z,Liu M,et al.Critical strain and models of dynamic recrystallization for FGH96 superalloy during two-pass hot deformation[J].Materials Science and Engineering A,2014,593:8-15.
• [16] 张静，张松，李斌训，等.高温高应变速率下H13钢的动态再结晶行为[J].金属热处理，2019,44(4):39-45.ZHANG Jing,ZHANG Song,LI Bin-xun,et al.Dynamic recrystallization behavior of H13 steel under high temperature and high strain rate[J].Heat Treatment of Metals,2019,44(4):39-45.
• [17] 李景丹，李荣斌，梁红玉.锻态SA508-3钢的动态再结晶预测模型[J].机械工程与自动化，2023(2):29-31.LI Jing-dan,LI Rong-bin,LIANG Hong-yu.Dynamic recrystallization prediction model of as-forged SA508-3 steel[J].Mechanical Engineering & Automation,2023(2):29-31.
• [18] 陈学文，杨喜晴，王继业，等.X12合金动态再结晶临界应变模型[J].材料热处理学报，2018,39(10):99-105.CHEN Xue-wen,YANG Xi-qing,WANG Ji-ye,et al.Critical strain model of dynamic recrystallization of X12 alloy[J].Transactions of Materials and Heat Treatment,2018,39(10):99-105.
• [19] Sun Y,Cao Z,Wan Z,et al.3D processing map and hot deformation behavior of 6A02 aluminum alloy[J].Journal of Alloys and Compounds,2018,742:356-68.
• [20] Sakai T,Belyakov A,Kaibyshev R,et al.Dynamic and post-dynamic recrystallization under hot,cold and severe plastic deformation conditions[J].Progress in Materials Science,2014,60:130-207.
• [21] 毛卫民，赵新兵.金属的再结晶与晶粒长大[M].北京：冶金工业出版社，1994:345.MAO Wei-min,ZHAO Xin-bing.Recrystallization of Metals and Grain Growth[M].Beijing:Metallurgical Industry Press,1994:345.
• [22] Savaedi Z,Motallebi R,Mirzadeh H.A review of hot deformation behavior and constitutive models to predict flow stress of high-entropy alloys[J].Journal of Alloys and Compounds,2022,903:163964.
• [23] Jonas J J,Sellars C M,Tegart W J M.Strength and structure under hot-working conditions[J].Metallurgical Reviews,1969,14(1):1-24.
• [24] Zener C,Hollomon J H.Effect of strain rate upon plastic flow of steel[J].Journal of Applied Physics,2004,15(1):22-32.
• [25] Li Y S,Zhang Y,Tao N R,et al.Effect of the Zener-Hollomon parameter on the microstructures and mechanical properties of Cu subjected to plastic deformation[J].Acta Materialia,2009,57(3):761-772.
• [26] 董定乾.核电用钢SA508-3热锻全流程晶粒演变数学模型及其在封头成形中的应用[D].上海：上海交通大学，2016.DONG Ding-qian.Mathematical model of grain evolution for nuclear power SA508-3 steel during hot forging process and its application in the development of heavy pressure vessel head forming[D].Shanghai:Shanghai Jiao Tong University,2016.
• [27] Rollett A D,Kocks U F.A review of the stages of work hardening[J].Solid State Phenomena,1993,35-36:1-18.
• [28] 马艳霞，周铁柱，苑伟，等.BFe10-1.6-1动态再结晶临界应变行为研究[J].锻压装备与制造技术，2019,54(1):111-115.MA Yan-xia,ZHOU Tie-zhu,YUAN Wei,et al.Study on flow stress behavior of BFe10-1.6-1 copper-nickel alloy[J].China Metalforming Equipment & Manufacturing Technology,2019,54(1):111-115.
• [29] Najafizadeh A,Jonas J J.Predicting the critical stress for initiation of dynamic recrystallization[J].ISIJ International,2006,46(11):1679-1684.
• [30] Mcqueen H J,Celliers O C.Application of hot workability studies to extrusion processing.Part III:Physical and mechanical metallurgy of Al-Mg-Si and Al-Zn-Mg alloys[J].Canadian Metallurgical Quarterly,1997,36(2):73-86.

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