发动机用镍基高温合金表面镀NiCrAlY涂层抗氧化性能的研究
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摘要
利用电弧离子镀工艺使GH4133表层覆盖形成一层NiCrAlY涂层,在920℃下对试样进行192 h的恒温氧化测试;并对试样的微观形貌、显微组织及其氧化过程的进行分析。结果表明:NiCrAlY涂层致密度较高,表面光滑,涂层表面分布着众多细小的颗粒,厚度介于65～70μm。对涂层热处理后,NiAl的衍射峰强度开始减小,同时Ni3Al峰值增大。NiCrAlY涂层的氧化过程动力学曲线存在轻度波动的现象。涂层氧化处理后,其表面开始部分脱落,并产生裂纹。涂层氧化物厚度随氧化时间的增加而加厚,氧化物层的形成对合金的抗氧化性能起到了良好的改善效果。
By using electric arc ion plating process, NiCrAlY coating was covered on GH4133 surface.The thermostatic oxidation test for the samples was carried out at 920 ℃for 192 h, and the morphology,microstructure and oxidation process of the samples was analyzed.The results show that NiCrAlY coating forms a smooth surface with high densities, and there are many fine particles distributing on the surface of the coating, and the thickness is between 65 μm and 70 μm. After the heat treatment for the coating, the diffraction peak intensity of NiAl begins to decrease, and at the same time, the Ni3Al peak intensity increases. There is slight fluctuation in the oxidation process kinetics curve of NiCrAlY coating. After the oxidation treatment for the coating, the coating surface begins to fall off and then,the cracks appear. The thickness of the coating oxide increases with the increase of oxidation time, and the formation of the oxide layer has a good improvement effect on the oxidation resistance of the alloy.
By using electric arc ion plating process, NiCrAlY coating was covered on GH4133 surface.The thermostatic oxidation test for the samples was carried out at 920 ℃for 192 h, and the morphology,microstructure and oxidation process of the samples was analyzed.The results show that NiCrAlY coating forms a smooth surface with high densities, and there are many fine particles distributing on the surface of the coating, and the thickness is between 65 μm and 70 μm. After the heat treatment for the coating, the diffraction peak intensity of NiAl begins to decrease, and at the same time, the Ni3Al peak intensity increases. There is slight fluctuation in the oxidation process kinetics curve of NiCrAlY coating. After the oxidation treatment for the coating, the coating surface begins to fall off and then,the cracks appear. The thickness of the coating oxide increases with the increase of oxidation time, and the formation of the oxide layer has a good improvement effect on the oxidation resistance of the alloy.
引文
[1]李民,程玉贤.航空发动机用高温防护涂层研究进展[J].中国表面工程,2012,25(1):16-21.
[2]李学峰,封子佳,孙俊华,等.等离子弧熔覆镍基耐磨涂层的组织与硬度[J].热加工工艺,2017,46(14):164-166.
[3]韦华,黄粮,梁静静,等.Re对NiCrAlY涂层热腐蚀行为的影响[J].中国腐蚀与防护学报,2010,30(2):150-154.
[4]Salam S, Hou P Y, Zhang Y D, et al.Compositional effects on the high-temperature oxidation lifetime of MCrAlY type coating alloys[J].Corrosion Science,2015,95:143-151.
[5]Zhao P, Shen M, Gu Y, et al.High vacuum arc ion plating NiCrAlY coatings:Bias effect and approach to preparation of functional gradient coatings[J].Surface&Coatings Technology,2015,281:44-50.
[6]龚才,代明江,陈明安,等.基体材料对Ti N薄膜表面液滴及薄膜结合力的影响[J].中国表面工程,2013,26(1):27-33.
[7]Wu Y N, Wang Q M, Ke P L, et al.Evaluation of arc ion plated NiCoCrAlYSiB coatings after oxidation at 900-1 100℃[J].Surface&Coatings Technology,2006,200(9):2857-2863.
[8]程宝义,冯爱新,毛加成,等.激光熔覆镍基合金涂层的摩擦磨损性能[J].热加工工艺,2017,46(10):166-167.
[9]Yuan K, Peng R L, Li X H, et al.Some aspects of elemental behaviour in HVOF MCrAlY coatings in high-temperature oxidation[J].Surface&Coatings Technology,2015,261:86-101.
[2]李学峰,封子佳,孙俊华,等.等离子弧熔覆镍基耐磨涂层的组织与硬度[J].热加工工艺,2017,46(14):164-166.
[3]韦华,黄粮,梁静静,等.Re对NiCrAlY涂层热腐蚀行为的影响[J].中国腐蚀与防护学报,2010,30(2):150-154.
[4]Salam S, Hou P Y, Zhang Y D, et al.Compositional effects on the high-temperature oxidation lifetime of MCrAlY type coating alloys[J].Corrosion Science,2015,95:143-151.
[5]Zhao P, Shen M, Gu Y, et al.High vacuum arc ion plating NiCrAlY coatings:Bias effect and approach to preparation of functional gradient coatings[J].Surface&Coatings Technology,2015,281:44-50.
[6]龚才,代明江,陈明安,等.基体材料对Ti N薄膜表面液滴及薄膜结合力的影响[J].中国表面工程,2013,26(1):27-33.
[7]Wu Y N, Wang Q M, Ke P L, et al.Evaluation of arc ion plated NiCoCrAlYSiB coatings after oxidation at 900-1 100℃[J].Surface&Coatings Technology,2006,200(9):2857-2863.
[8]程宝义,冯爱新,毛加成,等.激光熔覆镍基合金涂层的摩擦磨损性能[J].热加工工艺,2017,46(10):166-167.
[9]Yuan K, Peng R L, Li X H, et al.Some aspects of elemental behaviour in HVOF MCrAlY coatings in high-temperature oxidation[J].Surface&Coatings Technology,2015,261:86-101.