Ti811合金表面TC4激光熔覆层微观组织及性能
|
摘要
按照CFM56系列发动机维修手册的建议,在Ti811合金表面采用同步送粉激光熔覆技术,以TC4合金粉末为原料,制备出均匀致密、无气孔和裂纹等缺陷的激光熔覆层.分析涂层的宏观形貌、微观组织结构和组织相变过程,测试涂层的显微硬度和摩擦磨损性能.结果表明,扫描电镜下涂层微观组织呈现魏氏体结构特征,涂层显微硬度相比基材有所提高,主要原因是涂层中的针状马氏体α'有一定的强化作用;涂层中弥散分布的纳米颗粒Ti3Al的沉淀强化和弥散强化等作用也在一定程度上提高了涂层的显微硬度;熔覆层的磨损机制为磨粒磨损和黏着磨损的复合磨损机制.
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 Ti3 Al dispersing in the coating improved the microhardness to a certain extent.The wear mechanism of laser cladding layer was abrasive wear and adhesive wear.
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 Ti3 Al dispersing in the coating improved the microhardness to a certain extent.The wear mechanism of laser cladding layer was abrasive wear and adhesive wear.
引文
[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 ofβtitanium alloys in the aerospace industry[J].Journal of Materials Engineering and Per-formance,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+βisothermal 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-strengthβ-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.
[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 ofβtitanium alloys in the aerospace industry[J].Journal of Materials Engineering and Per-formance,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+βisothermal 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-strengthβ-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.