张曼莉,邱长军,郑文权,陈勇

• 1:南华大学机械工程学院

摘要(Abstract)：

利用火焰喷涂技术在中国低活化马氏体(CLAM)钢表面制备了CrFeAlTi涂层,然后通过5 kW横流CO_2激光器对该涂层进行多道搭接重熔处理。分别采用体视显微镜、扫描电镜(SEM)、X射线衍射仪(XRD)、显微硬度计、摩擦磨损试验机以及基体拉伸试验等分析测试手段对重熔前后涂层显微组织、物相组成、显微硬度、耐磨性能以及界面结合强度进行了研究。试验结果表明:激光重熔处理消除了火焰喷涂CrFeAlTi涂层的层状组织结构、孔洞、裂纹等缺陷,使涂层表面光滑、平整,内部组织致密、均匀,与基体形成了良好的冶金结合界面。火焰喷涂涂层表层物相主要为Al_2O_3、TiO、CrO_(0.87)、AlFeO_3、Cr_3C_2和Fe-Cr,激光重熔后涂层表层主要物相为Al_2O_3、TiO_2、(Al_(0.948)Cr_(0.052))_2O_3和Cr_7C_3。激光重熔涂层的平均硬度约为1864.2 HV0.2,比火焰喷涂涂层提高了约1倍。激光重熔涂层在室温干滑动摩擦条件下的耐磨性能明显优于火焰喷涂涂层与基体CLAM钢。激光重熔后涂层与基体的界面结合强度显著提高。

关键词(KeyWords)： 火焰喷涂;激光重熔;显微组织;显微硬度;耐磨性能;界面结合强度

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金重大研究计划(91326114);; 湖南省高校重点实验室(湘财教指[2014]85号);; 湖南省高校科技创新团队支持计划(湘教通[2012]318号);; 湖南省重点学科建设项目(湘教发[2011]76号)

作者(Author): 张曼莉,邱长军,郑文权,陈勇

DOI: 10.13289/j.issn.1009-6264.2016-X338

参考文献(References)：

• [1]赵志祥,夏海鸿.加速器驱动次临界系统(ADS)与核能可持续发展[J].中国核电,2009,2(3):202-211.ZHAO Zhi-xiang,XIA Hai-hong.Study on ADS and the sustainable development of nuclear energy[J].China Nuclear Power,2009,2(3):202-211.
• [2]Chen Z,Wu Y C,Yuan B X,et al.Nuclear waste transmutation performance assessment of an accelerator driven subcritical reactor for waste transmutation(ADS-NWT)[J].Annals of Nuclear Energy,2015,75:723-727.
• [3]王国伟,徐睦忠,田修波,等.铝离子注入不锈钢表面提高Al-Si钎料浸润分析[J].焊接学报,2011,32(11):45-48.WANG Guo-wei,XU Mu-zhong,TIAN Xiu-bo,et al.Wettability enhancement of Al-Si brazing filler on stainless steel using plasma Al ion implantation[J].Transactions of the China Welding Institution,2011,32(11):45-48.
• [4]GUO Zhi-hui,HUANG Qun-ying,YAN Zi-lin,et al.Compatibility of atmospheric plasma sprayed Al2O3coatings on CLAM with liquid Li Pb[J].Fusion Engineering and Design,2010,85:1469-1473.
• [5]ZHANG Hong-xiu,HONG Meng-qing,XIAO Xiang-heng,et al.Research progress on radiation tolerance of multilayer nanofilms[J].Nuclear Physics Review,2013,30(4):451-459.
• [6]李崇桂,封小松,卢庆华,等.激光重熔Al2O3-Ti O2涂层的强韧性能[J].焊接学报,2013,34(9):63-66.LI Chong-gui,FENG Xiao-song,LU Qing-hua,et al.Strength and toughness of laser-remelted Al2O3-Ti O2coatings[J].Transactions of the China Welding Institution,2013,34(9):63-66.
• [7]王玲,陈志刚,朱小蓉,等.激光重熔对火焰喷涂法制备Ni-WC复合涂层耐磨性能的影响[J].中国激光,2008,35(2):281-286.WANG Ling,CHEN Zhi-gang,ZHU Xiao-rong,et al.Effects of laser remelting on wear resistance of Ni-WC composite coatings by flame-spraying[J].Chinese Journal of Lasers,2008,35(2):281-286.
• [8]王红英,李志军,汤伟杰,等.等离子喷涂氧化锆涂层及激光重熔涂层的摩擦磨损性能[J].焊接学报,2014,35(4):41-44.WANG Hong-ying,LI Zhi-jun,TANG Wei-jie,et al.Friction and wear properties of the zirconia coatings prepared by plasma spraying and laser remelting[J].Transactions of the China Welding Institution,2014,35(4):41-44.
• [9]潘力平,郑子云,刘红伟,等.激光重熔对镍基热喷涂涂层性能的影响[J].兵器材料科学与工程,2015,38(1):77-80.PAN Li-ping,ZHENG Zi-yun,LIU Hong-wei,et al.Influence of laser remelting on properties of HVOF-sprayed nickel-based coatings[J].Ordnance Material Science and Engineering,2015,38(1):77-80.
• [10]张曼莉,郑文权,邱长军,等.激光原位制备Cr-Fe-Al-Ti复合涂层[J].金属热处理,2015,40(3):19-22.ZHANG Man-li,ZHENG Wen-quan,QIU Chang-jun,et al.Laser in situ synthesized Cr-Fe-Al-Ti composite coating[J].Heat Treatment of Metals,2015,40(3):19-22.
• [11]Picas J A,Forn A,Matthus G.HVOF coatings as an alternative to hard chrome for pistons and valves[J].Wear,2006,261:477-484.
• [12]王东生,田宗军,沈理达,等.激光重熔纳米Al2O3-13%Ti O2陶瓷涂层组织及性能[J].稀有金属材料与工程,2009,38(9):1542-1546.WANG Dong-sheng,TIAN Zong-jun,SHEN Li-da,et al.Microstructure and properties of laser-remelted nanostructured Al2O3-13%Ti O2ceramic coatings[J].Rare Metal Materials and Engineering,2009,38(9):1542-1546.
• [13]Yao J H,Ma C N,Gao M X,et al.Microstructure and hardness analysis of carbon nanotube cladding layers treated by laser beam[J].Surface and Coatings Technology,2006,201(6):2854-2858.
• [14]Archard J F.Contact and rubbing of flat surfaces[J].Journal of Applied Physics,1953,24(8):981-988.
• [15]张维平,刘中华,邹龙江.钛合金表面激光熔覆镍-铬-硅复合涂层的显微组织和摩擦学性能[J].机械工程材料,2008,32(7):52-55.ZHANG Wei-ping,LIU Zhong-hua,ZOU Long-jiang.Microstructure and tribological property of laser cladding Ni-Cr-Si composite coatings on titanium alloy[J].Materials for Mechanical Engineering,2008,32(7):52-55.

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