According to the proposal of CFM56 series engine maintenance manual, the fine coating without pores and cracks was prepared by laser cladding with TC4 powders with coaxial powder synchronous feeding on the surface of Ti811 alloy. The macroscopic morphology, microstructure and phase transformation of the coating were analyzed, and the microhardness and wear friction properties of the coating were tested. The results indicated that the microstructure of the coating showed an obvious widmanstatten structural characteristic under scanning electron microscopy; the microhardness of the coating was improved compared with that of the substrate. The main reason was that the acicular martensite α' in the coating had a certain strengthening effect on the coating; at the same time, the precipitation strengthening and dispersion strengthening of nanoparticles Ti3Al dispersing in the coating improved the microhardness to a certain extent. The wear mechanism of laser cladding layer was abrasive wear and adhesive wear.
ZHANG Tiangang
,
SUN Ronglu
. Microstructure and properties of TC4 laser cladding coating on Ti811 titanium alloy surface[J]. Transactions of The China Welding Institution, 2019
, 40(4)
: 41
-45
.
DOI: 10.12073/j.hjxb.2019400097
[1] 李重河, 朱明, 王宁, 等. 钛合金在飞机上的应用[J]. 稀有金属, 2009, 33(2):84-91 Li Chonghe, Zhu Ming, Wang Ning, et al. Application of titanium alloy in airplane[J]. Chinese Journal of Rare Metals, 2009, 33(2):84-91
[2] 赵永庆, 葛鹏. 我国自主研发钛合金现状与进展[J]. 航空材料学报, 2014, 34(4):51-61 Zhao Yongqing, Ge Peng. Current situation and development of new titanium alloys invented in China[J]. Journal of Aeronautical Materials, 2014, 34(4):51-61
[3] 朱知寿. 我国航空用钛合金技术研究现状及发展[J]. 航空材料学报, 2014, 34(4):44-50 Zhu Zhishou. Recent research and development of titanium alloys for aviation application in China[J]. Journal of Aeronautical Materials, 2014, 34(4):44-50
[4] 王向东, 逯福生, 贾翃, 等. 2003年中国钛工业发展报告[J]. 钛工业进展, 2004, 21(2):30-36 Wang Xiangdong, Lu Fusheng, Jia Hong, et al. Development report of titanium industry in China in 2003[J]. Titanium Industry Progress, 2004, 21(2):30-36
[5] Boyer R R, Briggs R D. The use of β titanium alloys in the aerospace industry[J]. Journal of Materials Engineering and Performance, 2005, 14(6):681-685.
[6] 曹春晓. 钛合金在大型运输机上的应用[J]. 稀有金属快报, 2006, 25(1):17-21 Cao Chunxiao. Applications of titanium alloys on large transporter[J]. Rare Metals Letters, 2006, 25(1):17-21
[7] 赵永庆, 陈永楠, 张学敏, 等. 钛合金相变及热处理[M]. 长沙:中南大学出版社, 2011.
[8] 张喜燕, 赵永庆, 白晨光. 钛合金及应用[M]. 北京:化学工业出版社, 2005.
[9] 常辉, Gautier E, Bruneseaux F, 等. Ti-B19钛合金的β→α +β等温相变动力学[J]. 稀有金属材料与工程, 2006, 35(11):1695-1699 Chang Hui, Gautier E, Bruneseaux F, et al. β→α +β isothermal phase transformation kinetics in Ti-B19 metastable titanium alloy[J]. Rare Metal Materials and Engineering, 2006, 35(11):1695-1699
[10] 张伟强. 固态金属及合金中的相变[M]. 北京:国防工业出版社, 2016.
[11] 朱知寿. 新型航空高性能钛合金材料技术研究与发展[M]. 北京:航空工业出版社, 2013.
[12] Ivasishin O M, Markovsky P E, Matviychuk Y V, et al. A comparative study of the mechanical properties of high-strength β-titanium alloys[J]. Journal of Alloy and Compounds, 2008, 457(1-2):296-309.
[13] 郭纯, 陈建敏, 姚润钢, 等. 激光熔覆原位制备Ti3Al金属间化合物涂层结构及摩擦学性能[J]. 摩擦学学报, 2013, 33(1):14-21 Guo Chun, Chen Jianmin, Yao Rungang, et al. Microstructure and tribological properties of Ti3Al intermetallic compound coating by laser cladding[J]. Tribology, 2013, 33(1):14-21
[14] Chen H, Zhou H M, Zou Y. Synthesis of ultrafine crystal/nanocrys-talline TiAl-based alloy by in situ sintering[J]. Rare Metal Materials and Engineering, 2015, 44(10):2387-2390.
[15] 高雪松, 黄因慧, 田宗军, 等. 钛合金表面激光熔覆等离子体喷涂Al2O3 +13%TiO2涂层冲蚀磨损性能[J]. 中国激光, 2010, 37(3):858-862 Gao Xuesong, Huang Yinhui, Tian Zongjun, et al. Erosive wear resistance behavior of laser cladding Al2O3 +13%TiO2 coating prepared by plasma spraying on titanium alloy surface[J]. Chinese Journal of Lasers, 2010, 37(3):858-862
