12Cr马氏体耐热钢是发电及其它行业高温高压部件的关键用材.在高温高压环境下长期服役会导致材料的性能下降和组织结构退化.评价服役材料的可靠性一直是高度关注的实际问题.本文通过对发电锅炉X20再热器炉管在不同服役时期的性能和组织结构比较研究,材料硬度随寿命减损而下降,尤其是晶界硬度低于基体硬度.相应的微观结构出现碳化物粗化和蠕变损伤现象.定量分析显示,主要碳化物M23C6成分显示出明显的合金元素富集,粗化的M23C6碳化物中Cr/Fe原子比随服役时间的变化规律存在明确的动力学规律.
参考文献
| [1] | P. J. ENNIS;A. CZYRSKA-FILEMONOWICZ .Recent advances in creep-resistant steels for power plant applications[J].Sadhana: Academy Proceedings in Engineering Science,2003(3/4):709-730. |
| [2] | Naoi H;Ohgami M;Hasegawa Y;Fuujita T.Creep behavior and microstructure of a 9％ Cr steel[A].Dordrecht:Kluwer Academic Publishers,1994 |
| [3] | Barraclough D R;Gooch D J .Effect of inadequate heat treatment on creep strength of 12C-Mo-V steel[J].Materials Science and Technology,1985,1(11):961-967. |
| [4] | Mughaei H.Microstructural and Mechanical Properties of Metallic High-Temperature Materials[M].Deutsche Forschungsgemeinschaft,Weinheim,Germany,1999 |
| [5] | 周顺深.火电厂高温部件寿命评估[M].北京:中国电力工业出版社,2007 |
| [6] | Strang A;Vodarek V.Effects of microstructural stability on the creep properties of high temperature martensitic 12Cr steels[A].Minerals,Metals & Materials Soc (TMS),1997:415-425. |
| [7] | Bendick W;Harrmann K;Wellnitz G et al.Properties of 9% to 12% chromium steels andtheir behaviour under creep conditions[J].VGBK Raftwerkstechnik,1993,73(01):73-79. |
| [8] | 胡正飞;吴杏芳;王春旭 .高钴镍合金钢中合金碳化物及转化研究[J].金属学报,2001,37(04):381-385. |
| [9] | Fujimitsu Masuyama.Hardness model for creep-life assessment of high-strength martensitic steels[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2009:154-157. |
| [10] | 胡正飞,杨振国.长期高温时效F12耐热合金钢中碳化物形态和组分变化[J].金属学报,2003(02):131-135. |
| [11] | Zheng-Fei Hu;Zhen-Guo Yang .An investigation of the embrittlement in X20CrMoV12.1 power plant steel after long-term service exposure at elevated temperature[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2004(2):224-228. |
| [12] | Panait, C.G.;Zielińska-Lipiec, A.;Koziel, T.;Czyrska-Filemonowicz, A.;Gourgues-Lorenzon, A.-F.;Bendick, W. .Evolution of dislocation density, size of subgrains and MX-type precipitates in a P91 steel during creep and during thermal ageing at 600°C for more than 100,000h[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2010(16/17):4062-4069. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%