Acta Metall Sin  1992, Vol. 28 Issue (11): 28-31    DOI:

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RELATIONSHIP BETWEEN CREEP PROPERTIES AND STRUCTURE OF STEEL 20Cr11MoVNbNB

FU Changpu; HAN Yong; LUShuangyun; AN Yunzheng (Shaanxi Mechanical Engineering Institute; Xi'an) PAN Jingda; DU Wenfeng(Beijing Heavy Electric Machine Works)

FU Changpu; HAN Yong; LUShuangyun; AN Yunzheng (Shaanxi Mechanical Engineering Institute; Xi'an) PAN Jingda; DU Wenfeng(Beijing Heavy Electric Machine Works). RELATIONSHIP BETWEEN CREEP PROPERTIES AND STRUCTURE OF STEEL 20Cr11MoVNbNB. Acta Metall Sin, 1992, 28(11): 28-31.

Abstract References Related Articles Recommended Metrics Download:  PDF(330KB)  Export:  BibTeX | EndNote (RIS)       Abstract  Studies were made of the creep properties and structure change of steel 20Cr11MoVNbNB at 550—650℃. It is found that at 550℃ when creep stress > 180MPa, there exists linear relation with two different slopes β_1 and β_2 between transitional creep strain ε_β and creep time t~(1/3), and β_1 (in initiol period) > β_2 (in later period). The Creep rate of stable stage at 550℃ can be expressed as ε_(11) = Aσ~nexp(-Q_c/RT), where, n=4.7, A exp(-Q_c/RT) = 5.37×10~(-16). Apparent creep active energy Q_c= 430kJ/mol at 550-650℃, which is much higher than the self-diffusion active energy of atoms for matrix Fe. In creep process, as creep stress and time increase, total weight of precipitated phases and relative weight of Cr, Mo and V increase, but those of Fe and Nb decrease in precipitated phases. Key words:  20Cr11MoVNbNB      heat-resisting steel      creep      creep hardness      creep active energy      Received:  18 November 1992      Service E-mail this article Add to citation manager E-mail Alert RSS （） Articles by authors URL:  https://www.ams.org.cn/EN/     OR     https://www.ams.org.cn/EN/Y1992/V28/I11/28 1 Mott N F. Philos Mag, 1953; 44: 742 2 孔庆平,林保军,葛庭燧.金属学报,1960;5(1) :48 3 Jenson R R,Tien J K.见:中国金属学会编译组译,物理冶金进展评论,北京:冶金工业出版社,1985:385 4 符长璞,憨勇.金属热处理,1992;(3) :21t [1] BAI Jiaming, LIU Jiantao, JIA Jian, ZHANG Yiwen. Creep Properties and Solute Atomic Segregation of High-W and High-Ta Type Powder Metallurgy Superalloy[J]. 金属学报, 2023, 59(9): 1230-1242. [2] CHEN Jia, GUO Min, YANG Min, LIU Lin, ZHANG Jun. Effects of W Concentration on Creep Microstructure and Property of Novel Co-Based Superalloys[J]. 金属学报, 2023, 59(9): 1209-1220. [3] FENG Qiang, LU Song, LI Wendao, ZHANG Xiaorui, LI Longfei, ZOU Min, ZHUANG Xiaoli. Recent Progress in Alloy Design and Creep Mechanism of γ'-Strengthened Co-Based Superalloys[J]. 金属学报, 2023, 59(9): 1125-1143. [4] LI Xiaolin, LIU Linxi, LI Yating, YANG Jiawei, DENG Xiangtao, WANG Haifeng. Mechanical Properties and Creep Behavior of MX-Type Precipitates Strengthened Heat Resistant Martensite Steel[J]. 金属学报, 2022, 58(9): 1199-1207. [5] GAO Chuan, DENG Yunlai, WANG Fengquan, GUO Xiaobin. Effect of Creep Aging on Mechanical Properties of Under-Aged 7075 Aluminum Alloy[J]. 金属学报, 2022, 58(6): 746-759. [6] PENG Zichao, LIU Peiyuan, WANG Xuqing, LUO Xuejun, LIU Jian, ZOU Jinwen. Creep Behavior of FGH96 Superalloy at Different Service Conditions[J]. 金属学报, 2022, 58(5): 673-682. [7] YANG Zhikun, WANG Hao, ZHANG Yiwen, HU Benfu. Effect of Ta Content on High Temperature Creep Deformation Behaviors and Properties of PM Nickel Base Superalloys[J]. 金属学报, 2021, 57(8): 1027-1038. [8] ZHANG Nizhen, MA Xindi, GENG Chuan, MU Yongkun, SUN Kang, JIA Yandong, HUANG Bo, WANG Gang. Effect of Adding Ag on the Nanoindentation Behavior of Cu-Zr-Al-Based Metallic Glass[J]. 金属学报, 2021, 57(4): 567-574. [9] XU Jinghui, LI Longfei, LIU Xingang, LI Hui, FENG Qiang. Thermal-Stress Coupling Effect on Microstructure Evolution of a Fourth-Generation Nickel-Based Single-Crystal Superalloy at 1100oC[J]. 金属学报, 2021, 57(2): 205-214. [10] GUO Qianying, LI Yanmo, CHEN Bin, DING Ran, YU Liming, LIU Yongchang. Effect of High-Temperature Ageing on Microstructure and Creep Properties of S31042 Heat-Resistant Steel[J]. 金属学报, 2021, 57(1): 82-94. [11] WU Yupeng, ZHANG Bo, LI Jingming, ZHANG Shuangnan, WU Ying, WANG Yumin, CAI Guixi. Ultrasonic Detection for Fiber Broken in Aero-Engine Integral Bladed Ring[J]. 金属学报, 2020, 56(8): 1175-1184. [12] LIU Tian, LUO Rui, CHENG Xiaonong, ZHENG Qi, CHEN Leli, WANG Qian. Investigations on the Accelerated Creep Testing of Alumina-Forming Austenitic Stainless Steel[J]. 金属学报, 2020, 56(11): 1452-1462. [13] WU Jing,LIU Yongchang,LI Chong,WU Yuting,XIA Xingchuan,LI Huijun. Recent Progress of Microstructure Evolution and Performance of Multiphase Ni3Al-Based Intermetallic Alloy with High Fe and Cr Contents[J]. 金属学报, 2020, 56(1): 21-35. [14] HU Bin,LI Shusuo,PEI Yanling,GONG Shengkai,XU Huibin. Influence of Small Misorientation from <111> on Creep Properties of a Ni-Based Single Crystal Superalloy[J]. 金属学报, 2019, 55(9): 1204-1210. [15] Wenshu TANG,Junfeng XIAO,Yongjun LI,Jiong ZHANG,Sifeng GAO,Qing NAN. Effect of Re-Heat Rejuvenation Treatment on γ′ Microstructure of Directionally SolidifiedSuperalloy Damaged by Creep[J]. 金属学报, 2019, 55(5): 601-610. No Suggested Reading articles found! Viewed Full text Abstract Cited   Shared      Discussed