|
Abstract：
|
|
For 12%Cr ultra-supercritical rotor steel, the hot deformation compression experiments were conducted by thermal simulator Gleeble-1500D under the conditions of the deformation temperatures of 900-1250 ℃, the strain rates of 0.005, 0.05, 0.5 and 5 s-1 and the deformation amount of 50%, and the stress-strain curves under different parameters were obtained. Then, the constitutive equation of the maximum deformation resistance of 12%Cr ultra-supercritical rotor steel was derived by hyperbolic sine function Arrhenius, and the microstructures of 12%Cr ultra-supercritical rotor steel under different hot working conditions were analyzed. The experimental results show that 12%Cr ultra-supercritical rotor steel is sensitive to the changes of deformation temperature and strain rate. The higher the deformation temperature is and the lower the strain rate is, the smaller the corresponding stress value is, and the more easily the recrystallization phenomenon occurs. Furthermore, the deformation activation energy Q of 12%Cr ultra-supercritical rotor steel is 5.266×105 J·mol-1.
|
|
Funds：
|
|
国家自然科学基金资助项目 (51775361)；上海大件热制造工程技术研究中心（18DZ2253400）
|
|
AuthorIntro：
|
|
张学忠(1979- )， 男，博士研究生，E-mail：466945302@qq.com；通讯作者：刘建生(1958- )， 男，博士，教授，博士生导师，E-mail：jiansliu@163.com
|
|
Reference：
|
[1]王利平.我国火电机组的现状及发展趋势[J].湖南电力,1997, (4):52-56, 61.
Wang L P. Current situation and development trend of thermal power units in China [J]. Hunan Electric Power,1997, (4):52-56, 61.
[2]马晓然. 大锻件12％Cr超超临界转子钢铸态热变形行为的研究[D]. 上海：上海交通大学，2015.
Ma X R. Study on the Cast Thermal Deformation Behavior of 12%Cr Ultra-supercritical Rotor Steel for Large Forgings [D]. Shanghai: Shanghai Jiao Tong University, 2015.
[3]马力深, 钟约先, 马庆贤，等. 高中压转子钢TR1200高温变形行为的研究[J]. 塑性工程学报, 2008, 15(1):66-69.
Ma L S, Zhong Y X, Ma Q X, et al. Research on hot deformation behavior of TR1200 HP-IP rotor steel [J]. Journal of Plastic Engineering, 2008, 15(1):66-69.
[4]王宝忠. 12％Cr超超临界转子的热加工过程物理模拟及研制[J]. 材料导报, 2009, 23(12): 58.
Wang B Z. Physical simulation and development of 12%Cr ultra-supercritical rotor in thermal processing [J]. Materials Review, 2009, 23(12): 58.
[5]孙奉亮. 12%Cr超超临界转子钢锻造过程微观组织演变的实验及模拟研究[D]. 太原：太原科技大学,2011.
Sun F L. Experimental and Simulation Study on Microstructure Evolution of 12%Cr Ultra-supercritical Rotor Steel Forging Process [D]. Taiyuan: Taiyuan University of Science and Technology, 2011.
[6]陈学文, 王纳纳, 皇涛，等. 超超临界转子用X12钢高温变形行为及基于应变补偿的本构模型[J]. 材料热处理学报, 2018, 39(5): 134-140.
Chen X W, Wang N N, Huang T, et al. Hot deformation behavior of X12 steel for ultra-supercritical rotor and its constitutive model based on strain compensation [J]. Transactions of Materials and Heat Treatment, 2018, 39(5): 134-140.
[7]张世伟，杨明，梁益龙，等. 低碳钢20CrNi2Mo的高温热变形行为及热加工图[J]. 材料热处理学报, 2017, 38(8): 159-167.
Zhang S W, Yang M, Liang Y L, et al. Hot deformation behavior and hot processing map of 20CrNi2Mo low carbon steel at elevated temperature [J]. Transactions of Materials and Heat Treatment, 2017, 38(8): 159-167.
[8]Sellars C M, Mctegart W J. On the mechanism of hot deformation[J]. Acta Metallurgica, 1966, 14(9):1136-1138.
[9]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.
[10]何霞, 张彦敏, 宋克兴,等. Cu-0.23Be-0.84Co 合金热变形行为[J]. 塑性工程学报, 2015, 12(2):105-110.
He X, Zhang Y M, Song K X, et al. Study on hot deformation behaviors of Cu-Be-Co alloy [J]. Journal of Plastic Engineering, 2015, 12(2):105-110.
[11]解婧陶,王钦娟,王璐银.奥氏体不锈钢321合金不同应变速率下动态再结晶分析[J].锻压技术, 2019,44(6):178-182.
Xie J T,Wang Q J,Wang L Y. Dynamic recrystallization analysis on austenitic stainless steel 321 alloy at different strain rates[J]. Forging & Stamping Technology,2019,44(6):178-182.
[12]Zener C, Hollomon J H. Effect of strain rate upon plastic flow of steel[J]. Journal of Applied Physics, 1944, 15(1):22-32.
[13]冯泽林, 陈其伟, 王会廷. 一种热成型钢热压缩流变行为的本构方程[J]. 安徽工业大学学报: 自然科学版, 2014, 31(1): 29-33.
Feng Z L, Chen Q W, Wang H T. Constitutive model of hot forming behavior of a hot stamping steel during hot compression [J]. Journal of Anhui University of Technology: Natural Science, 2014, 31(1):29-33.
|
|
Service：
|
|
【This site has not yet opened Download Service】【Add
Favorite】
|
|
|
|
Copyright Forging & Stamping Technology.All rights reserved