Microstructure, friction and wear behaviors of laser cladding rare earth CeO2+Ni60 alloys coating on Al alloy surface

被引：0
作者：
Zheng, Ying [1 ]
Wang, Chenglei [2 ]
Gao, Yuan [2 ]
Zhang, Guangyao [2 ]
机构：
[1] Department of Mechanical and Electrical Engineering, Hunan Communication Polytechnic, Changsha
[2] School of Material Science and Engineering, Guilin University of Electronic Technology, Guilin
来源：
Xiyou Jinshu/Chinese Journal of Rare Metals | 2014年 / 38卷 / 05期
关键词：
Aluminum alloy; Friction and wear behaviors; Laser cladding; Rare earth;
D O I：
10.13373/j.cnki.cjrm.2014.05.010
中图分类号：
学科分类号：
摘要：
To improve the surface properties of aluminum alloys, such as higher hardness and wear resistance, a rare earth CeO2+Ni60 alloy cladding layer bonded to substrate was prepared on the surface of aluminum alloy by laser cladding. The macroscopic morphology, microstructure, and microhardness of laser cladding rare earth 2%CeO2+Ni60 alloy coatings on Al alloys were investigated, and its friction and wear behavior were also studied. A comparative study on Ni60 alloy cladding layer and aluminum alloy was made as well. The results showed that the Ni60 cladding layer added 2%CeO2 could reduce surface relief, and get a better macro-morphology cladding layer; the cracks, holes and entrapment in the coatings reduced; the grains became small, the microstructure uniformity was improved, and the hardness and wear resistance of the coatings increased. The microhardness of 2%CeO2+Ni60 cladding layer was significantly higher than that of Ni60 cladding layer in the same depth of position, and the highest microhardness of 2%CeO2+Ni60 cladding layer was up to HV0.051180, which was 8.4 times the average microhardness of 6063 Al matrix. Under the same abrasive wear conditions, the wear resistance of 2%CeO2+Ni60 cladding layer was 7.1 times that of untreated aluminum alloy, and 1.6 times that of Ni60 cladding layer; Ni60 cladding layer could significantly reduce the friction coefficient of aluminum alloy, and the rare-earth CeO2+Ni60 cladding layer could improve the stability of friction coefficient and thus improve wear resistance. ©, 2014, Editorial Office of Chinese Journal of Rare Metals. All right reserved.
引用
收藏
页码：800 / 806
页数：6
相关论文
共 18 条
  • [1] Qi W.J., Wang S.C., Chen X.M., Nong D., Zhou Z., Effective nucleation phase and grain refinement mechanism of Al-5Ti-1B master alloy , Chinese Journal of Rare Metals, 37, 2, (2013)
  • [2] Wei W., Jiang P., Tang Y.F., Niu L.Z., Cao F., Analysis on forging defects of aluminum alloy forging with rib , Forging & Stamping Technology, 37, 4, (2012)
  • [3] Li Z.M., Zhu Y.L., Xin Y., Influence of ultrasonic impact treatment on fatigue properties of 2A12 aluminum alloy welded joints , Journal of Aeronautical Materials, 31, 2, (2011)
  • [4] Wong T.T., Liang G.Y., He B.L., Wear resistance of laser-clad Ni-Cr-B-Si alloy on aluminium alloy , Journal of Materials Processing Technology, 10, 3, (2000)
  • [5] Liang G.Y., Su J.Y., The microstructure and tribological characteristics of laser-clad Ni-Cr-Al coatings on aluminium alloy , Materials Science and Engineering, 29, 4, (2000)
  • [6] Sun X.Q., Wei F., Yang Z.M., Chen Q.Y., Chen J., Structure and morphology of CeO<sub>2</sub> films deposited on Si(111) substrates by pulsed laser deposition in high vacuum atmosphere , Chinese Journal of Rare Metals, 37, 3, (2013)
  • [7] Tang D.J., Liu Y.J., Rare Earth Materials, (2011)
  • [8] Zhong H.R., Rare-Earth Chemical Heat Treatment of Steel, (1998)
  • [9] Xu Z., Plasma Surface Metallurgy, (2008)
  • [10] Xu Z., Liu X., Zhang P., Zhang Y., Zhang G., He Z., Double glow plasma surface alloying and plasma nitriding , Surface and Coatings Technology, 201, (2007)
12