原位生成NbC颗粒增强镍基激光熔覆层

牛薪; 晁明举; 王文丽; 袁斌; 梁二军

中国激光, 2006, 33 (7): 987, 网络出版: 2006-08-08

原位生成NbC颗粒增强镍基激光熔覆层

In Situ Synthesized NbC Particulate Reinforced Ni-Based Composite Coatings by Laser Cladding

论文大纲

牛薪 ^*晁明举王文丽袁斌梁二军

作者单位

郑州大学物理工程学院教育部材料物理重点实验室, 河南郑州 450052

激光技术激光熔覆原位生成碳化铌显微组织耐磨性 laser technique laser cladding in-situ synthesis NbC microstructure wear resistance

摘要

激光熔覆技术是金属材料表面强化和改性的有效方法之一。利用该技术,在A3钢表面激光熔覆预置涂层,成功制备出了原位生成NbC颗粒增强的镍基复合涂层,并进行了硬度、摩擦性能测试,X射线衍射(XRD)和显微组织分析。扫描电镜(SEM)、能谱分析(EDS)和X射线衍射分析结果表明,原位生成NbC颗粒增强的镍基复合涂层与基材呈现良好的冶金结合,熔覆层的组织为先共晶析出的树枝晶(Cr,Fe碳化物相)和原位生成的NbC颗粒相均匀分布在γ(Ni Fe)基体中。硬度测试和摩擦磨损实验表明,激光熔覆原位生成NbC颗粒增强镍基复合涂层平均硬度高达HV0.31200,耐磨性是纯Ni60激光熔覆层的2.5倍。分析认为,其硬度和耐磨性提高的原因在于涂层中形成了大量的、原位生长的NbC颗粒增强相,且均匀分布于基体中。

Abstract

Laser cladding is the one of the efficient methods for the surface hardening and modifying of metal material. Using this technology, NbC particulate reinforced Ni-based composite coating has been successfully in situ synthesized on steel A3 substrate by prior to pasting. The microstructure observation and hardness test on the cross-section of the laser clad layer were performed. And that X-ray diffraction (XRD) analysis and tribotesting on the surface of the coatings were also accomplished. The microstructural and metallographic analyses by a scanning electron microscope (SEM), energy-dispersive spectrometer (EDS) and X-ray diffractometer reveal that the coating epitaxial growing from the substrate with excellent bonding between the coating and substrate is ensured by the strong metallurgical interface and suggest the presence of the in situ synthesized NbC particles in the clad layer. These NbC particles together with the carbide dendrites present as reinforcements of the composite coatings and are homogenously dispread in the γ(Ni Fe) matrix. The experimental results show that the composite coating gives high average hardness of HV0.31200 and excellent wear resistance, which is 2.5 times as high as that of pure Ni60 coatings. The improvement of wear resistance is due to the presence of the substantive in situ synthesized NbC particles and their homogenous distribution in the coatings.

参考文献

[1] Xiaolei Wu. Rapidly solidified nonequilibrium microstructure and phase transformation of laser-synthesized iron-based alloy coating [J]. Surface and Coatings Technology, 1999, 115(2-3):153～162

[2] Sun Ronglu, Liu Yong, Yang Dezhuang. Microstructure and tribological properties of NiCrBSi-TiC laser clad layer on titanium alloy substrate [J]. Chinese J. Lasers, 2003, 30(7):659～662
孙荣禄,刘勇,杨德庄. 钛合金表面激光熔覆NiCrBSi-TiC复合涂层的组织和摩擦磨损性能[J]. 中国激光, 2003, 30(7):659～662

[3] D. W. Zeng, C. S. Xie, M. Q. Wang. In situ synthesis and characterization of Fep/Cu composite coating on SAE 1045 carbon steel by laser cladding [J]. Materials Science and Engineering, 2003, A344(1-2):357～364

[4] Zhang Qingmao,He Jinjiang,Liu Wenjin et al.. Microstructure characteristics of ZrC-reinforced composite coating produced by laser cladding [J]. Surface and Coatings Technology, 2003, 162(2-3):140～146

[5] Si Songhua, Yuan Xiaomin, He Yizhu et al.. Microstructures and properties of laser clad Ni-based metal-ceramics layers [J]. Chinese J. Lasers, 2002, A29(8):759～762
斯松华,袁晓敏,何宜柱等. 激光熔覆镍基金属陶瓷涂层的组织性能研究[J]. 中国激光, 2002, A29(8):759～762

[6] . . Fabrication methods of metal matrix composites in-situ[J]. Materials Review, 2002, 16(12): 23-26.

[7] Tian Nailiang, Du Rongjian, Zhou Changchi. Study on stress status of WC doped Ni-based alloy by laser cladding [J]. Chinese J. Lasers, 2004, 31(4):505～508
田乃良,杜荣建,周昌炽. 激光熔覆添加碳化钨的镍基合金应力状况研究[J]. 中国激光, 2004, 31(4):505～508

[8] Wu Ping, Jiang Enyong, Zhou Changchi et al.. Microstructure and properties of Ni/WC composite coating prepared by laser cladding [J]. Chinese J. Lasers, 2003, 30(4):357～360
吴萍,姜恩永,周昌炽等. 激光熔覆Ni/WC复合涂层的组织和性能[J]. 中国激光, 2003, 30(4):357～360

[9] Liu Xiubo, Wang Huaming. Study on wear and high temperature oxidation properties of laser clad metallic silicide composite coatings on TiAl intermetallic alloy [J]. Chinese J. Lasers, 2005, 32(8):1143～1149
刘秀波,王华明. TiAl合金激光熔覆金属硅化物复合材料涂层耐磨性和高温氧化性能研究[J]. 中国激光, 2005, 32(8):1143～1149

[10] . . Fabrication of nickel composite coatings reinforced with TiC particles by laser cladding[J]. Surface and Coatings Technology, 2004, 183: 254-260.

[11] Le Zhiqiang, Bo Shengmin, Wang Guangjian. Handbook of Fine Inorganic Compounds [M]. Beijing: Chemistry Industry Press, 2001. 862～863
乐志强,薄胜民,王光建主编. 无机精细化学品手册[M]. 北京:化学工业出版社, 2001. 862～863

[12] . . Production and applications of TaC & NbC in China[J]. Rare Metal Materials and Engineering, 1998, 27(1): 26-31.

[13] . Character of nucleation and branching of strengthening phase in Ni-NbC alloys[J]. Acta Metallurgica Sinica, 1995, 31(9): 405-410.

[14] . . Effect of NbC precipitation on microstructure and shape memory recovery of FeMnSiCrNi shape memory alloy[J]. Rare Metal Materials and Engineering, 2003, 32(11): 927-929.

[15] . Vilar. Laser cladding[J]. The International Journal of Powder Metallurgy, 2001, 37(2): 31.

[16] Xinlin Wang, Shihong Shi, Qiguang Zheng. Wear resistance of laser cladding and plasma spray welding layer on stainless steel surface [J]. Chin. Opt. Lett., 2004, 2(3):151～153

[17] . . Microstructures and friction and wear properties of laser clad NiCrBSiC alloy[J]. Chinese J. Nonferrous Matals, 1998, 8(2): 201-205.

[18] Niu Xin, Chao Mingju, Zhou Xiaowei et al.. Research on in-situ synthesis of B4C particulate reinforced Ni-based composite coatings by laser cladding [J]. Chinese J. Lasers, 2005, 32(11):1583～1588
牛薪,晁明举,周笑薇等. 激光熔覆原位生成B4C颗粒增强镍基复合涂层的研究[J]. 中国激光, 2005, 32(11):1583～1588

[19] Chao Mingju, Liang Erjun, Zhao Dong. Effect of TiO2 on the laser cladding layers of Ni based alloy on 45# steel [J]. Chinese J. Lasers, 2003,30(10):947～952
晁明举,梁二军,赵栋. TiO2对45#钢表面激光熔覆镍基合金的影响[J]. 中国激光, 2003, 30(10):947～952

牛薪, 晁明举, 王文丽, 袁斌, 梁二军. 原位生成NbC颗粒增强镍基激光熔覆层[J]. 中国激光, 2006, 33(7): 987. 牛薪, 晁明举, 王文丽, 袁斌, 梁二军. In Situ Synthesized NbC Particulate Reinforced Ni-Based Composite Coatings by Laser Cladding[J]. Chinese Journal of Lasers, 2006, 33(7): 987.

原位生成NbC颗粒增强镍基激光熔覆层

关于本站 Cookie 的使用提示

全站搜索

原位生成NbC颗粒增强镍基激光熔覆层

相关论文

相关资讯

关于本站 Cookie 的使用提示

全站搜索