采用静态恒温氧化增质法研究Ni76Cr19AlTi合金在600～800℃范围内的高温氧化动力学规律,采用场发射扫描电镜对氧化产物进行表面和横断面形貌观察,用X射线衍射仪分析氧化膜层的物相组成.结果表明,合金在600～800℃范围内氧化增质与氧化时间的关系遵从抛物线规律,氧化速率常数K.随温度的升高而增大;在800℃下氧化200 h,平均氧化速率为0.002 15 mg·cm-2·h-1,合金属于完全抗氧化级;氧化过程中,氧化膜主要受控于Cr2O3的生长,经过长时间氧化后,表层为比较疏松的TiO2和Cr2O3,内层为起保护作用的Cr2O3和Al2O3,氧化膜的组成以Cr2O3为主.
参考文献
| [1] | Srinivasan N;Prasad Y V R K .Hot working characteristics of nimonic 75,80 A and 90 superalloys:a comparison using processing maps[J].Journal of Materials Processing Technology,1995,51(1-4):171-192. |
| [2] | I. A. Choudhury;M. A. El-Baradie .Machinability of nickel-base super alloys: a general review[J].Journal of Materials Processing Technology,1998(1/3):278-284. |
| [3] | H.Gabrisch;D.Mukherji .CHARACTER OF DISLOCATIONS AT THE γ/γ' INTERFACES AND INTERNAL STRESSES IN NICKEL- BASE SUPERALLOYS[J].Acta materialia,2000(12):3157-3167. |
| [4] | Baohui Tian;Oskar Paris;Gerald A. Zickler .SANS investigation of phase separation in hot-deformed Nimonic 80a[J].Scripta materialia,2002(1):25-30. |
| [5] | Dong Kwon Kim;Dong Young Kim;Seog Hyeon Ryu .Application of nimonic 80A to the hot forging of an exhaust valve head[J].Journal of Materials Processing Technology,2001(1/3):148-152. |
| [6] | U.S. Jeong;J.R. Cho;H.C. Park .Microstructure prediction of Nimonic 80A for large exhaust valve during hot closed die forging[J].Journal of Materials Processing Technology,2005(0):504-511. |
| [7] | Smialek J L;Meier G H.Insuperalloys Ⅱ[M].New York:John Wiley and Sons,1987 |
| [8] | 黄乾尧;李汉康.高温合金[M].北京:冶金工业出版社,2000 |
| [9] | Seal S;Kuiry S C;Leyda A .Studies on the surface chemistry of oxide films formed on IN-738LC superalloy at elevated temperatures in dry air[J].Oxidation of Metals,2001,56(5-6):583-603. |
| [10] | 楼翰一,唐幼军,孙晓峰,管恒荣.K17F高温合金溅射微晶层的抗循环氧化行为[J].中国有色金属学报,1995(04):87-92. |
| [11] | Giggins C S;Pettit F S .Oxidation of Ni-Cr alloys between 800 ℃ and 1 200 ℃[J].Transactions of the Metallurgical Society of AIME,1969,245(12):2495-2507. |
| [12] | 田素贵,张禄廷,杨洪才,胡壮麒,李铁藩.镍基单晶合金高温氧化的动力学特征[J].材料研究学报,2002(02):183-187. |
| [13] | Ledjeff K;Rahmel A;Schorr M .Influence of metal grain growth on the oxidation behavior of a 25Cr-20Ni steel[J].Oxidation of Metals,1981,15(5-6):485-493. |
| [14] | 李美栓.金属的高温腐蚀[M].北京:冶金工业出版社,2001 |
| [15] | Abe F;Araki H;Yoshida H et al.Role of aluminum and titanium on the oxidation process of a nickelbase superalloy in steam at 800 ℃[J].Oxidation of Metals,1987,27(1-2):21-36. |
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%