通过Thermo-Calc热力学软件计算、定量金相分析、冲击试验和SEM试验分析,研究了化学成分和正火温度对材料中δ铁素体含量的影响,并分析了δ铁素体的形成机制,以及含量和位置分布对材料冲击韧性的影响.结果表明:化学成分和正火温度对δ铁素体含量影响显著,C+N含量增加能够显著降低材料中的δ铁素体含量；δ铁素体主要集中在原奥氏体晶界位置生成,显著降低材料的冲击功,并且在δ铁素体与马氏体基体界面位置会聚集大量富Nb碳化物,降低韧性的同时减少了MX相生成量.
参考文献
| [1] | Knezevic V;Balun J;Sauthoff G et al.Design of Martensitic/Ferritic Heat-Resistant Steels for Application at 650℃ With Supporting Thermodynamic Modeling[J].Materials Science and Engineering A,2008,447:334. |
| [2] | Vitek J M;Klueh R L .Precipitation Reactions During the Heat Treatment of Ferritic Steels[J].Metallurgical and Materials Transactions A:Physical Metallurgy and Materials Science,1983,14(06):1047. |
| [3] | Cai Guang-jun;Andren Hans-Olof;Svensson Lars-Erik.Effect of Cooling After Welding on Microstructure and Mechanical Properties of 12 Pct Cr Steel Weld Metals[J].Metallurgical and Materials Transactions A:Physical Metallurgy and Materials Science,1997:1417-1428. |
| [4] | Thomson R C;Bhadeshia H K D H .Carbide Precipitation in 12CrlMoV Power Plant Steel[J].Metallurgical and Materials Transactions A:Physical Metallurgy and Materials Science,1992,1171:79. |
| [5] | Fujio Abe;Torsten-Ulf Kern;Viswanthan R.Creep-Resistant Steels[M].Cambridge:Woodhead Publishing Limited,2008 |
| [6] | Sch(a)fer L;Schirra M .Influence of Delta Ferrite and Dendritic Carbides on the Impact and Tensile Properties of a Martensitic Chromium Steel[J].Journal of Nuclear Materials,1998,258(10):1336. |
| [7] | 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(09):1. |
| [8] | Hald J .Microstructure and Long-Term Creep Properties of 9%-12% Cr Steels[J].International Journal of Pressure Vesselsand Piping,2008,85:30. |
| [9] | Kouichi MARUYAMA;Kota SAWADA;Jun-ichi KOIKE .Strengthening Mechanisms of Creep Resistant Tempered Martensitic Steel[J].ISIJ International,2001(6):641-653. |
| [10] | 包汉生,程世长,刘正东,谭舒平.化学成分和热处理温度对T122耐热钢中δ-铁素体含量的影响[J].钢铁,2009(12):74-78. |
| [11] | Gabrel J;Zakine C;Lefebvre B.VM12-A New 12％Cr Steel for Application at High Temperature in Advanced Power Plant-Status of Development[A].Florida,USA,2007:5. |
| [12] | Anderko K;Sch(a)fer L;Materna-Morris E.Effect of the △-Ferrite Phase on the Impact Properties of Martensitic Chromium Steels[J].,1991(01):492. |
| [13] | Guang-Jun Cai;Hans-Olof Andren .Effect of Cooling after Welding on Microstructure and Mechanical Properties of 12 Pct Cr Steel Weld Metals[J].Metallurgical and Materials Transactions, A. Physical Metallurgy and Materials Science,1997(7):1417-1429. |
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%