陈学文,杨喜晴,王继业,张家银,刘佳琪

• 1:河南科技大学材料科学与工程学院

摘要(Abstract)：

采用Gleeble-1500D热-力模拟试验机在变形温度950～1200℃,应变速率0.05～5 s~(-1)的条件下对超超临界汽轮机的高、中压转子用X12(X12CrMoWVNbN10-1-1)合金进行了热模拟压缩试验。基于试验所得数据求解加工硬化率,根据lnθ-ε曲线出现的拐点以及-(lnθ)/ε-ε曲线的最小值,建立了X12合金的动态再结晶临界应变模型。研究表明:X12合金的在应变速率为0.05～0.1 s~(-1)、温度为950～1200℃和应变速率为0.5～5 s~(-1)、温度为950～1050℃时发生动态再结晶;临界应变(ε_c)与峰值应变(ε_p)之间呈正比关系ε_c/ε_p=0.69;动态再结晶临界应变模型为ε_c=0.0266Z~(0.0326)。

关键词(KeyWords)： X12合金;加工硬化率;动态再结晶;临界应变模型

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金资助项目(51575162)

作者(Author): 陈学文,杨喜晴,王继业,张家银,刘佳琪

DOI: 10.13289/j.issn.1009-6264.2018-0221

参考文献(References)：

• [1] 马力深,钟约先,马庆贤,等.超(超)临界火电机组高中压转子技术的发展[J].锻压技术,2006,31(1):94-98.MA Li-shen,ZHONG Yue-xian,MA Qing-xian,et al.Technical development of HP-IP rotors in supercritical (ultra-supercritical) fossil plants[J].Forging and Stamping Technology,2006,31(1):94-98.
• [2] Sui D S,Gao L,Cui Z S.Microstructure evolution of different forging processes for 12%Cr steel during hot deformation[J].Journal of Shanghai Jiaotong University,2015,20(5):606-611.
• [3] Sui D S,Wang W,Fu B,et al.Research on flow stress model and dynamic recrystallization model of X12CrMoWVNbN10-1-1 steel[C]//The 11th international Conference on Numerical Methods in Industrial Forming Processes.Shenyang,China:AIP Publishing LLC,2013:826-837.
• [4] Wang B Z,Fu W T,Lv Z Q,et al.Study on hot deformation behavior of 12%Cr ultra-super-critical rotor steel[J].Materials Science and Engineering A,2008,487:108-113.
• [5] Wang Z H,Fu W T,Wang B Z,et al.Study on hot deformation characteristics of 12%Cr ultra-super-critical rotor steel using processing maps and Zener-Hollomon parameter[J].Materials Characterization,2010,61:25-30.
• [6] Gottstein G,Brunger E,Frommert M,et al.Prediction of the critical conditions for dynamic recrystallization in metals[J].Zeitschrift fur Metallkunde,2003,94(5):628-635.
• [7] Poliak E I,Jonas J.Critical strain for dynamic recrystallization in variable strain rate hot deformation[J].ISIJ International,2003,43(5):692-700.
• [8] Najafizadeh A,Jonas J J.Predicting the critical stress for initiation of dynamic recrystallization[J].ISIJ International.2006,46(11):1679-1684.
• [9] 谭智林,向嵩.Q690低碳微合金钢热变形行为及动态再结晶临界应变[J].材料热处理学报,2013,34(5):42-46.TAN Zhi-lin,XIANG Song.Behavior of hot deformation and critical strain for dynamic recrystallization of a Q690 low carbon microalloyed steel[J].Transactions of Materials and Heat Treatment,2013,34(5):42-46.
• [10] 黄光杰,钱宝华,汪凌云,等.AZ31镁合金初始动态再结晶的临界条件研究[J].稀有金属材料与工程,2007,36(12):2080-2083.HUANG Guang-jie,QIAN Bao-hua,WANG Ling-yun,et al.Study on the critical conditions for initial dynamic recrystallization of AZ31 magnesium alloy[J].Rare Metal Materials and Engineering,2007,36(12):2080-2083.
• [11] 欧阳德来,鲁世强,崔霞,等.应用加工硬化率研究TA15钛合金β区变形的动态再结晶临界条件[J].航空材料学报,2010,30(2):17-23.OUYANG De-lai,LU Shi-qiang,CUI Xia,et al.Study on critical strains of dynamic recrystallization during β process in TA15 titanium alloy using working hardening rate[J].Journal of Aeronautical Materials,2010,30(2):17-23.
• [12] 欧阳德来,鲁世强,黄旭,等.TA15钛合金β区变形动态再结晶的临界条件[J].中国有色金属学报,2010,20(8):1539-1544.OUYANG De-lai,LU Shi-qiang,HUANG Xu,et al.Critical conditions of dynamic recrystallization during deformation of β area in TA15 titanium alloy[J].The Chinese Journal of Nonferrous Metals,2010,20(8):1539-1544.
• [13] 陈学文,陈天安,周会军,等.45Cr4NiMoV合金动态再结晶临界应变[J].材料热处理学报,2015,36(1):109-113.CHEN Xue-wen,CHEN Tian-an,ZHOU Hui-jun,et al.Critical strain of dynamic recrystallization of 45Cr4NiMoV steel[J].Transactions of Materials and Heat Treatment,2015,36(1):109-113.
• [14] 郝庆乐,韩静涛,徐海峰.高强硼钢高温软化机制及动态再结晶临界条件[J].材料热处理学报,2016,37(1):230-236.HAO Qing-le,HAN Jing-tao,XU Hai-feng.Softening mechanism and critical conditions of dynamic recrystallization for a high strength boron steel[J].Transactions of Materials and Heat Treatment,2016,37(1):230-236.
• [15] Poliak E I,Jonas J J.Initiation of dynamic recrystallization in constant strain rate hot deformation[J].ISIJ International,2003,43(5):684-691.
• [16] 蔡志伟,陈拂晓,郭俊卿.AZ41M镁合金动态再结晶临界条件[J].中国有色金属学报,2015,25(9):2335-2341.CAI Zhi-wei,CHEN Fu-xiao,GUO Jun-qing.Critical conditions of dynamic recrystallization for AZ41M magnesium alloy[J].The Chinese Journal of Nonferrous Metals,2015,25(9):2335-2341.
• [17] Sellars C M.Computer modeling of hot-working process[J].Materials Science and Technology,1985(1):325-332.

文章评论(Comment)：