Effect of Aluminum on Microstructure and Performance of Laser Cladding Ni-based Alloy Coating

被引：0
|
作者：
Jiang Z. [1 ]
Chen Q. [1 ]
Dong W. [1 ]
Tong Q. [1 ]
Li W. [1 ,2 ]
机构：
[1] School of Resoures, Environment and Materials, Guangxi University, Nanning
[2] Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured Materials, Guangxi University, Nanning
来源：
Cailiao Daobao/Materials Reports | 2019年 / 33卷 / 06期
基金：
中国国家自然科学基金;
关键词：
Friction and wear; High temperature oxidation; Laser cladding; Nodular cast iron;
D O I：
10.11896/cldb.18030211
中图分类号：
学科分类号：
摘要：
In order to improve the performance of Ni based alloy coating 0wt%, 2wt%, 4wt%, 6wt% and 8wt% Al elements were added to Ni based alloy.The effects of Al addition on the wear resistance, high temperature oxidation resistance and thermal fatigue resistance of Ni based alloy were analyzed by SEM, XRD, friction and wear, high temperature oxidation and thermal shock test. The results show that, with the addition of aluminum could significantly improve the cladding formability, but when the aluminum content was more than 4wt%, the cracks appeared. By presetting the Ni based intermediate layer, the content of Al in the coatings could be increased from 4wt% to 8wt% at the premise of no crack defect. The microhardness experiment showed that when the aluminum content was 8wt%, the microhardness of the coating was 740HV, which was 1.85 times of that of the nickel-based coating. The tests of friction and wear showed that the wear resistance of the coating was best at the aluminum content of 6wt% which wear mass loss was 25% of the nickel-based coating. The high temperature oxidation results showed that the oxidation resistance of the coating with 8wt% aluminum content after 850℃/120 h oxidation was the best, the Al2O3, NiCr2O4, (Fe, Cr)2O3 and γ-Ni phases formed on the annealed coating, and the oxidation weight gain rate was 1.89 mg/cm2, which was only 35% of the nickel-based coating. © 2019, Materials Review Magazine. All right reserved.
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页码：2035 / 2039
页数：4
相关论文
共 22 条
  • [1] Li Y., Dong S., Yan S., Et al., Surface and Coatings Technology, 339, (2018)
  • [2] Zhang W.J., Research on the visual recognition technology of laser repair mould, (2015)
  • [3] Xu X., Mi G., Chen L., Et al., Journal of Alloys & Compounds, 715, 8, (2017)
  • [4] Xiao Y., Gu J.F., Zhang Y.L., Et al., Materials Reviev B: Research Papers, 31, 11, (2017)
  • [5] Tan C., Zhu H., Kuang T., Et al., Journal of Alloys & Compounds, 690, 1, (2017)
  • [6] Zhong L., Li R.G., Zhang X.L., Journal of Mechanical Engineering, 53, 2, (2017)
  • [7] Jiang J.B., Lian G.F., Xu M.S., Journal of Chongqing University of Technology (Natural Science), 29, 1, (2015)
  • [8] Li J.L., Cheng C.Z., Modern Welding Technology, 1, 97, (2011)
  • [9] Sun Y.Z., Liu S., Li J.B., Et al., Materials Reviev B: Research Papers, 31, 2, (2017)
  • [10] Wang Y.Q., Guo P.D., Qi H.B., Applied Laser, 37, 6, (2017)
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