借助光学显微镜和透射电镜,研究了SAVE12钢的微观组织.结果表明,蠕变前后SAVE12钢组织主要为马氏体,也有少量δ-铁素体.蠕变前SAVE12钢中主要存在3种析出相,分别为富Nb的MX相,富Cr的M23C6相和富Fe的M5C2相.蠕变后部分MX相发生三点变化:Nb元素少量下降,其它金属元素少量增加;Nb元素较大下降,而Ta和W元素较大增加,变成富Ta的MX相;Nb元素较大下降,而Cr和V元素较大增加.蠕变后M23C6相化学成分基本没有变化,但析出量增加,且颗粒尺寸长大的不明显.蠕变后在δ-铁素体中有Laves相析出.
参考文献
| [1] | Fujimitsu MASUYAMA .History of Power Plants and Progress in Heat Resistant Steels[J].ISIJ International,2001(6):612-625. |
| [2] | Horst CERJAK .The Influence of Microstructural Aspects on the Service Behaviour of Advanced Power Plant Steels[J].ISIJ International,1999(9):874-888. |
| [3] | Abe F;Nakazawa S .Microstructural evolution and creep behaviour of bainitic,martensitic,and martensite-ferrite dual phase Cr-2W steels[J].Materials Science and Technology,1992,8(12):1063-1069. |
| [4] | Masuyama F.New developments in steels for power genmation boilers[A].London:The Institute of Materials,1999:33-48. |
| [5] | Viswanathan R;Bakker W .Materials for uhrasupercritical coal power plants-boiler materials:part 1[J].Journal of Materials Engineering and Performance,2001,10(01):81-95. |
| [6] | Viswanathan R;Bakker W .Materials for ultrasupercritical coal power plants-turbine materials:part 2[J].Journal of Materials Engineering and Performance,2001,10(01):96-101. |
| [7] | Yamada K.;Muneki S.;Abe F.;Igarashi M. .Creep properties affected by morphology of MX in high-Cr ferritic steels[J].ISIJ International,2001(S.s):S116-S120. |
| [8] | Zavaleta Gutiérrez, N.;De Cicco, H.;Marrero, J.;Danón, C.A.;Luppo, M.I. .Evolution of precipitated phases during prolonged tempering in a 9%Cr1%MoVNb ferritic-martensitic steel: Influence on creep performance[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2011(12):4019-4029. |
| [9] | J. Hald .Microstructure and long-term creep properties of 9-12% Cr steels[J].International Journal of Pressure Vessels and Piping,2008(1/2):30-37. |
| [10] | Fujio Abe .Precipitate design for creep strengthening of 9% Cr tempered martensitic steel for ultra-supercritical power plants[J].SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS,2008,9(01):1-15. |
| [11] | Kouichi MARUYAMA;Kota SAWADA;Jun-ichi KOIKE .Strengthening Mechanisms of Creep Resistant Tempered Martensitic Steel[J].ISIJ International,2001(6):641-653. |
| [12] | 石如星,刘正东.P92耐热钢δ-铁素体内的析出相[J].材料热处理学报,2011(11):64-67. |
| [13] | Shengzhi Li;Zumrat Elimyaz;Lanting Zhang.Microstructural evolution of delta ferrite in SAVE12 steel under heat treatment and short-term creep[J].Materials Characterization,2012:144-152. |
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%