系统研究了预先冷轧变形对马氏体时效钢强化的影响,研究结果表明:510℃×3 h时效引起的强度净增加值恒定,与冷轧变形量无关,最终的强度为:σ=σ0+△σCR+△σAge,即初始强度、冷加工强化和时效强化的叠加,其中只有冷加工强化△σCR随变形量变化.电子衍射花样及衍射斑强度分布证实:510℃×3 h时效后马氏体基体内析出六方结构的Ni3(Ti,Mo)和正交结构的Ni3 Mo,冷轧变形量对时效析出行为没有明显的影响.
参考文献
| [1] | Rack H J;Kalish n .Improved Fatigue Resistance of 18Ni(350)Maraging Steel Through Thermomechanical Treatments[J].Metallurgical and Materials Transactions,1974,5(03):685. |
| [2] | Roberson J A;Adair A M .The Effects of Prior Deformation on the Strengthening Processes in Maraging Steel[J].Transactions TMS-AIME,1969,245(09):1937. |
| [3] | Z.Ahmad .Texture Development in Dual-Phase Cold-Rolled 18 pct Ni Maraging Steel[J].Metallurgical and Materials Transactions, A. Physical Metallurgy and Materials Science,1997(12):2459-2467. |
| [4] | Ahreu H F G;Tavares S S M;Silva J J M et al.The Influence of an Intermediate Austenization Heat Treatment in the Texture of Cold-Rolled and Aged 18%Ni Maraging Steel[J].Materials Characterization,2004,52(03):203. |
| [5] | I. K. Lee;C. P. Chou;C. M. Cheng .Effect of heat treatment on microstructures of flow formed C-250 maraging steel[J].Materials Science and Technology: MST: A publication of the Institute of Metals,2003(11):1595-1602. |
| [6] | R. TEWARI;S. MAZUMDER;I. S. BATRA .PRECIPITATION IN 18 WT Ni MARAGING STEEL OF GRADE 350[J].Acta materialia,2000(5):1187-1200. |
| [7] | LI X D;YIN Z D .A Computer-simulated Electron Diffraction Analysis of Precipitates in 18 Ni(350)Maraging Steel[J].Materials Letters,1995,23(4-6):269. |
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%