研究了已服役16年的汽轮机30Cr1Mo1V高中压转子钢的高温疲劳性能.选取高应力段、高温段和中压段等3个典型部位切向样品进行538℃条件下的低周疲劳性能和疲劳裂纹扩展速率性能比较试验,试验结果表明,高温段的疲劳性能劣化最严重,高应力段次之.相应的微观结构观察发现,30Cr1Mo1V转子钢原始的回火索氏体组织发生了明显的分解,这一现象在高温和高应力段材料中表现更为明显,碳化物粗化或球化严重,晶界碳化物呈连续链状分布,在高温段的晶界处还发现了少量的蠕变孔洞,这些微观结构现象应是材料性能退化的原因.
参考文献
| [1] | OKAZAKI M;HASHIMOTO M;MOCHIZUKI T .Creep-fatigue strength of long-term post service 2.25Cr-1Mo steel and remaining life estimation[J].Journal of Pressure Vessel Technology,Transactions of the ASME,1991,113(11):549-555. |
| [2] | JOARDERA;CHERUVU N S;SARMA DS .Microstructural changes in a service exposed CrMoV rotor steel subjected to high temperature low cycle fatigue[J].Materials Transactions-Japan Institute of Metals,1991,32(02):135-144. |
| [3] | MELTON K N .Strain wave shape and frequency effects on the high temperature low cycle fatigue behavior of a 1Cr-1Mo 1V ferritics steel[J].Materials Science and Engineering,1982,55:21-28. |
| [4] | 李雅武,李长宝,王梅英.30Cr1Mo1V转子钢低周疲劳性能及损伤演变规律研究[J].汽轮机技术,1998(03):184. |
| [5] | LIAW P K;SWARMINATHAN V P .Elevated temperature fatigue crack growth behavior of a rotor steel[J].Engineering Fracture Mechanics,1989,34(02):457-463. |
| [6] | 唐立强,黎锐文,李琪,米海蓉.亚临界温度条件下转子钢疲劳裂纹扩展速率[J].哈尔滨工程大学学报,2000(04):73-78. |
| [7] | BAMBRI S K .Low cycle fatigue behavior of 1CrMoV steel with bainite and ferrite microstructure[J].International Journal of Fatigue,1987,9(03):239-246. |
| [8] | LIAW P K .Effects of load ratio and temperature on the nearthreshold fatigue crack propagation behavior in a CrMoV steel[J].Metallurgical and Materials Transactions,1983,14(08):1631-1640. |
| [9] | 孙清民 .汽轮机转子钢30Cr1Mo1V低周疲劳特性研究[D].长沙理工大学,2010. |
| [10] | 王梅英;孙福民;王立峰 等.汽轮机高中压转子钢30Cr1Mo1V的疲劳断裂性能[J].北京科技大学学报,2001,23(增刊):115-117. |
| [11] | Jae Seung Lee;Hassan Ghassemi Armaki;Kouichi Maruyama .Causes of breakdown of creep strength in 9Cr-1.8W-0.5Mo-VNb steel[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2006(1/2):270-275. |
| [12] | 安运铮;潘景达;符长璞.汽轮机发电机用钢金相图谱[M].北京:机械工业出版社,1997 |
| [13] | ZAUTER R;PERTY F;CHRIST H J et al.Thermomechanical Fatigue Behavior of Materials[J].ASTM Stp,1993,1186:70. |
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