Static recrystallization behavior of 12%Cr ultra-supercritical rotor steel

doi:10.13251/j.issn.0254-6051.2024.09.015

Abstract

Abstract: Static recrystallization behavior of 12%Cr ultra-supercritical rotor steel at high temperature was studied by double-pass hot compression test using Gleeble-1500D thermomechanical simulator. Effects of strain rate and prestrain on the static recrystallization behavior of the tested material were discussed, and effects of deformation temperature and pass interval time were also elaborated. According to the test results, the kinetics model for static recrystallization and the static recrystallization grain size model of the material were established. The results show that the volume fraction of static recrystallization increases with the increase of temperature and prestrain. Moreover, the increase of strain rate and the extension of pass interval time are also conducive to the occurrence of static recrystallization. The static recrystallization activation energy of the material is calculated to be 3.155×10⁵ J/mol. Combined with the static recrystallization grain growth model, the grain refinement process conditions are established.

Key words: 12%Cr ultra-supercritical rotor steel, static recrystallization, kinetics model, grain size model

CLC Number:

TG142

Zhang Xuezhong, Liu Jiansheng, Jiao Yongxing, Li Fei, Chen Fei. Static recrystallization behavior of 12%Cr ultra-supercritical rotor steel[J]. Heat Treatment of Metals, 2024, 49(9): 91-95.

References

[1]蔡泽鹏. 超超临界机组发电机进相能力探析[J]. 机电信息, 2023(21): 20-22.
Cai Zepeng. Analysis of the leading phase capacity of generators in ultra supercritical units[J]. Mechanical and Electrical Information, 2023(21): 20-22.
[2]顾剑锋, 韩利战, 李传维. 大型锻件晶粒细化热处理研究进展[J]. 金属热处理, 2019, 44(1): 7-12.
Gu Jianfeng, Han Lizhan, Li Chuanwei. Research progress of grain refinement heat treatment for heavy forgings[J]. Heat Treatment of Metals, 2019, 44(1): 7-12.
[3]Zhao B C, Zhang T, Hu X X. Limitations of double compression to determine static recrystallization fraction[J]. The Journal of Strain Analysis for Engineering Design, 2023, 58(4): 297-304.
[4]许燕燕, 苏继伟. 大型汽轮机转子锻件缺陷分析[J]. 大型铸锻件, 2018(1): 50-51.
Xu Yanyan, Su Jiwei. Defect analysis of heavy steam turbine rotor forging[J]. Heavy Casting and Forging, 2018(1): 50-51.
[5 ]刘志祥. 12%Cr超超临界转子钢热处理基础研究与工艺模拟[D]. 太原:太原科技大学, 2012.
[6]段兴旺, 李凯, 焦永星, 等. 17CrNiMo6钢的静态再结晶行为[J]. 金属热处理, 2022, 47(11): 184-191.
Duan Xingwang, Li Kai, Jiao Yongxing, et al. Static recrystallization behavior of 17CrNiMo6 steel[J]. Heat Treatment of Metals, 2022, 47(11): 184-191.
[7]龚虎. 12%Cr超超临界转子钢微观组织演变规律及数值模拟的研究[D]. 太原:太原科技大学, 2017.
[8]Alberto R, Vania M R, Heriberto G B, et al. Ultrasonic characterization of microstructural changes due to static recrystallization and grain growth in Inconel 625 and Inconel 718 superalloys[J]. Ultrasonics, 2024(142): 107383.
[9]Garcia C P, Eipe J J, Krugla M, et al. Nucleation sites in the static recrystallization of a hot-deformed Ni-30 pct Fe austenite model alloy[J]. Metallurgical and Materials Transactions, 2023, 54(6): 2160-2177.
[10]刘干, 孔祥磊, 黄明浩, 等. 冷却速率对超高强度X90M管线钢相变行为的影响[J]. 金属热处理, 2024, 49(5): 162-167.
Liu Gan, Kong Xianglei, Huang Minghao, et al. Effect of cooling rate on phase transformation behavior of ultra-high strength X90M pipeline steel[J]. Heat Treatment of Metals, 2024, 49(5): 162-167.
[11]王进, 陈军, 张斌, 等. 35CrMo结构钢热塑性变形流动应力模型[J]. 上海交通大学学报, 2005(11): 48-50, 55.
Wang Jin, Chen Jun, Zhang Bin, et al. The flow stress model of 35CrMo structural steel during hot forming[J]. Journal of Shanghai Jiao Tong University, 2005(11): 48-50, 55.
[12]Mohd K R, Afaf A A G, Missam I, et al. Practical approach for determining material parameters when predicting grain size after static recrystallization[J]. Journal of Materials Research and Technology, 2023, 23: 3928-3941.
[13]邬文睿. 超超临界汽轮机转子高温强度研究[D]. 上海: 上海交通大学, 2009.
[14]Cockcroft M G, Latham D J. Ductility and the workability of metals[J]. Journal of the Institute of Metals, 1968, 96: 33-39.

[1]	Xue Yunze, Xu Dong, Zheng Bing, Shi Husheng, Yang Fengguo, Zheng Lei. Static recrystallization behavior of boron-containing cold heading steel 10B21 during hot deformation [J]. Heat Treatment of Metals, 2024, 49(6): 217-223.
[2]	Hao Tianci, Wu Yonghao, Yin Shubiao, Cao Jianchun, Luo Hanyu. Effect of Zr on static recrystallization kinetics of deformed austenite and precipitates in Ti-Mo composite microalloyed steel [J]. Heat Treatment of Metals, 2022, 47(2): 41-47.
[3]	Duan Xingwang, Li Kai, Jiao Yongxing, Wang Min, He Linfeng. Static recrystallization behavior of 17CrNiMo6 steel [J]. Heat Treatment of Metals, 2022, 47(11): 184-191.
[4]	Duan Chunzheng, Qin Siwei. Dynamic recrystallization kinetics model of hardened GCr15 steel at high temperature and high strain rate [J]. HTM, 2017, 42(2): 34-38.
[5]	Liu Chao1.2，Li Wenqi3, Meng Junxue4, Chen Jilin1,2. Relationship between microstructure and torsional properties of Qst32-3 ultra-low carbon steel [J]. HTM, 2017, 42(2): 76-79.
[6]	Han Jiao1，2,Li Li1,Yu Feng2,Xu Da2,Cao Wenquan2. Effect of solution treatment on microstructure and properties of high temperature bearing steel G80T [J]. HTM, 2016, 41(7): 121-126.
[7]	Xu Bin1, Li Shouhua2, Mi Zhenli3. Static softening behavior of ultra-high strength DP980 steel [J]. HTM, 2016, 41(6): 22-26.
[8]	Ding Wei1,2, Du Jingchao1, Guo Jinglong1, Li Yan2. Static recrystallization behaviors of C-Mn-Al-P TRIP steel with La addition [J]. HTM, 2016, 41(5): 81-84.
[9]	Yang Caishui1, Luo Xu1,2, Kang Yonglin1, Li Junhong2. Static recrystallization behavior of low manganese and titanium microalloyed Q345B steel [J]. HTM, 2015, 40(3): 30-33.
[10]	Li Shuo, Wu Huibin, Jiang Haitao，Ren Jianwei. Static recrystallization behavior of reduced activation ferritic/martensitic steel [J]. HTM, 2014, 39(9): 82-86.