采用固体粉末包埋渗铝法,在Fe-Cr-Ni合金表面制备渗铝涂层,并研究了其因渗剂中铁铝含量的不同对Fe-Cr-Ni合金渗铝、氧化及结焦行为的影响。通过对各组渗铝以及渗铝并氧化后的试样表面及截面微观形貌、相组织进行研究,并结合结焦增重曲线发现,铁铝比例的增加能够促使合金表面形成平整致密的渗铝涂层,提高氧化膜的质量,但也会降低渗层的厚度,影响表面氧化膜的连续性。选用合适的铁铝含量可以获得较高质量的氧化铝涂层,进而达到防结焦效果。
Simuhaneous deposition of A1-Fe coatings on Fe-Cr-Ni alloy was realized by pack cementation to investigate its coking resistance. The effect of mass ratio of Fe and A1 on the aluminizing and oxidation behavior of Fe-Cr-Ni alloy with and without the coatings was studied. The mierostructure and phase structure of the coatings were analyzed by EDS and XRD. The anti-coking ability of the coatings was investigated by continuous coking experiments. The results show that increasing the mass ratio of Fe/A1 can improve surface morphology of the specimens and form good adhesion of the coatings to the substrate. However, the addition of too much Fe powders decreases the thickness of the coatings and affects the formation of the continuous A12 03 film. Therefore, controlling the mass ratio of Fe/A1 propery could obtain high-quality aluminized coatings for the sake of anti-coking.
参考文献
| [1] | 王平.我国乙烯工业现状及未来发展[J].当代石油石化,2005(10):24-27. |
| [2] | 詹倩 .新型裂解炉管材料抗结焦性能的研究[D].中国科学院金属研究所,1999. |
| [3] | 李处森,杨院生.金属材料在高温碳气氛中的结焦与渗碳行为[J].中国腐蚀与防护学报,2004(03):188-192. |
| [4] | Lu X;He X B;Zhang B et al.High-temperature oxidation behavior of TiAI-based alloys fabricated by spark plasma sintering[J].Journal of Alloys and Compounds,2009,478:220-225. |
| [5] | Atikur Rahman;R. Jayaganthan;Satya Prakash .High temperature oxidation behavior of nanostructured Ni-Al coatings on superalloy[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2009(1/2):478-483. |
| [6] | Critchlow G W;Yendall K A;Bahrani D.Strategies for the replacement of chromic acid anodising for the structural bonding of aluminium alloys[J].International Journal of Adhesion and Adhesives |
| [7] | Zhou C G;Xu H B;Kyoo Y K et al.The influence of additions of Nb and Cr on the aluminizing behavior of TiAI alloy[J].Metallurgical and Materials Transactions A:Physical Metallurgy and Materials Science,2000,31:2391-2394. |
| [8] | Houngniou C;Chevalier S;Larpin J P .High temperature oxidation behavior of iron-aluminide diffusion coatings[J].Oxidation of Metals,2006,65:409-439. |
| [9] | 陈为为,何业东.TiAl合金表面机械研磨渗铝涂层的制备及高温性能[J].材料热处理学报,2011(06):138-142. |
| [10] | Cueff R;Buscail H;Caudron E et al.Effect of reactive element oxide coating on the high temperature oxidation behaviour of Fe-Cr-AI alloys[J].Applied Surface Science,2004,229:233-241. |
| [11] | Yang S L;Wang F H .Effect of nano-crystallization on sulfur segregation in Fe-Cr-A1 alloy during oxidation at 1000 ℃[J].Oxidation of Metals,2006,65:195-205. |
| [12] | Hu, GX;Xu, ZX;Liu, JJ;Li, YH .Microstructure and corrosion resistance of simultaneous Al-Fe coating on copper by pack cementation[J].Surface & Coatings Technology,2009(22):3392-3397. |
| [13] | Luiz E;Karin E;Andre S .Assessment of the Fe Ni A1 system[J].Intermetallies,2006,14:1276-1290. |
| [14] | Igor C;Klaus W R;Herbert I .The Fe-Ni-A1 phase diagram in the Al-rieh( 》 50 at% A1)corner[J].Intermetallics,2007,15:1416-1424. |
| [15] | Zhan, ZL;He, YD;Li, L;Liu, HX;Dai, YN .Low-temperature formation and oxidation resistance of ultrafine aluminide coatings on Ni-base superalloy[J].Surface & Coatings Technology,2009(16):2337-2342. |
| [16] | Schumann E .The effect of Y-Ion implantation on the oxidation of γ-NiA1[J].Oxidation of Metals,1995,43:157-172. |
| [17] | 李美栓.金属的高温腐蚀[M].北京:冶金工业出版社,2001:239-240. |
| [18] | 罗小秋;黄志荣 等.HP40钢表面沉积A1203薄膜及其抗结焦性能[J].中国腐蚀与防护学报,2008,29(03):140-142. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%