在晶界面上用萃取碳复型技术研究了镍基合金GH4049(Ni-15Co-10Cr-5.5W-5Mo-4.2Al-1.5Ti)中与B和C的晶界偏聚效应密切相关的二次析出相特征.B含量低于0.008%时,因固溶B/C(原子比)很低,晶界析出大尺寸MC薄膜和M6C枝晶片以及薄膜状M23C6,不利于高温塑性和持久寿命.B含量为0.011%和0.018%时,固溶B/C(原子比)虽仅为0.667和0.941,已可减少和全部抑制上述碳化物的析出,代之以弥散M3B2颗粒,高温性能大幅度上升.但B含量过高,M3B2密集析出,高温性能下降.降低固溶冷却速度而使B和C原子向晶界长程偏聚,可促进M3B2析出,改善MC的形貌并抑制M6C和M23C6析出.
参考文献
| [1] | Franzoni U, Marchetti F, Sturlese S. Scr Metall, 1985; 19:511 |
| [2] | Cao W D, Kennedy R L. In: Kissinger R D, Deye D J,Anton D L, Cetel A D, Nathal M V, Pollock T M, Woodford D A, eds., Superalloys 1996, Warrendale, PA: TMS AIME, 1996:589 |
| [3] | Kennedy R L, Cao W D, Thomas W M. Adv Mater Process, 1996; 149(3): 33 |
| [4] | Gorokhov V P, Kolachev B A, Parfenova O A, Novikova M B. Metall Heat Treat Met, 2003; (4): 22(Горо x овВП, КолачевБА,ПарфеноваОА, НовиковаМБ.МиТОМ, 2003; (4): 22) |
| [5] | Letellier L, Chambreland S, Duval P. Appl Surf Sci, 1993;67:305 |
| [6] | Letellier L, Guttmann M, Blavette D. Philos Mag Lett,1994; 70:189 |
| [7] | Horton J A, McKamey C G, Miller M K, Cao W D,Kennedy R L. In: Loria E A, ed., Superalloys 718,625, 706 and Various Derivatives, Warrendale, PA: TMS AIME, 1997:401 |
| [8] | Lemarchand D, Cadel E, Chambreland S, Blavette D. Philos Mag, 2002; 82A: 1651 |
| [9] | Miller M K, Anderson I M, Pike L M, Klarstrom D L.Mater Sci Eng, 2002; A327:89 |
| [10] | Li Y Q, Liu J Y. High Temp Technol, 1990; 8:278 |
| [11] | LiY Q, Xu B W, Li Q K. Mater High Temp, 1992; 10:219 |
| [12] | Li Y Q, Chen G S, Zhang J F, Liu J Y. Prog Nat Sci,2000; 10:331 |
| [13] | Liu L R, Jin T, Zhao N R, Sun X F, Guan H R, Hu Z Q.Mater Sci Eng, 2003; A361:191 |
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%