原位生成WB-CrB增强镍基激光熔覆层

杨文超; 晁明举; 孙艳敏; 杨宁; 田得雨

doi:doi:10.3788/lop47.081403

激光与光电子学进展, 2010, 47 (8): 081403, 网络出版: 2010-06-29

原位生成WB-CrB增强镍基激光熔覆层

In-Situ Synthesis of WB-CrB Reinforced Ni-Based Coatings by Laser Cladding

论文大纲

杨文超 ^*晁明举孙艳敏杨宁田得雨

作者单位

郑州大学物理工程学院材料物理教育部重点实验室,河南郑州 450052

激光熔覆原位生成WB-CrB 显微组织耐磨性 laser cladding in-situ synthesized WB-CrB microstructure wear resistance

摘要

采用激光熔覆技术,在45#钢表面制备原位生成WB-CrB颗粒增强镍基复合涂层。使用X射线衍射仪(XRD)、金相显微镜、扫描电镜(SEM)和能量色散谱(EDS),对熔覆层的显微组织和物相构成进行分析,并对硬度、摩擦性能进行测试。结果表明,在适当工艺条件下,原位生成WB-CrB颗粒增强镍基涂层形貌良好,涂层与基材呈冶金结合。熔覆层底部组织为定向生长的γ(NiFe)树枝晶,熔覆层中上部组织为WB-CrB颗粒相,均匀分布于γ(NiFe)树枝晶基体中。熔覆层具有较高的硬度(平均硬度HV0.31350)和良好的耐磨性,其摩损失重仅为纯Ni60熔覆层的1/7。大量WB-CrB复合颗粒的形成及其在涂层中的均匀弥散分布是熔覆层硬度和耐磨性提高的主要原因。

Abstract

The in-situ WB-CrB reinforced Ni-based composite coating is synthesized by laser cladding on steel 45# by prior to pasting. The microstructure and phase analyses are performed by X-ray diffractometer (XRD),optical microscope,scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). The microhardness and tribological properties of the coatings are also investigated. The results indicate that the coating epitaxial growing from the substrate with excellent bonding between the coating and substrate is ensured by the strong metallurgical interface. The microstructure at the bottom of the cladding layer mainly consists of orients dendrites of γ(NiFe). The microstructure at the middle and upper zones contains WB-CrB particles dispersed in the matrix of γ(NiFe). Compared with a pure Ni60 coating,the hardness of the WB-CrB complex particulate-reinforced composite coating is enhanced to HV0.31350. The wear and tear mass loss in a block on ring test against hardened steel is reduced by a factor of seven. This can be attributed to the presence of in-situ synthesized WB-CrB complex particles and their well distribution in the coating.

参考文献

[1] . . Molybdenum-on-chromium dual coating on steel[J]. Surf. Coat. Technol., 2009, 203(9): 1281-1287.

[2] Jing Leizhu,Jihua Huang,Haitao Wang et al.. In-situ synthesis and microstructure of TiC-Fe36Ni composite coatings by reactive detonation-gun spraying [J]. Mater. Lett.,2008,62(12-13):2009~2012

[3] 魏仑,陈庆华,龙晋明等. 激光熔覆原位自生复相陶瓷颗粒增强涂层 [J]. 激光技术,2002,26(4):246~249

Wei Lun,Chen Qinghua,Long Jinming et al.. Laser cladding in situ formed polyphase ceramic particle reinforced coating [J]. Laser Technology,2002,26(4):246-249

[4] Danny P′ng,Pal Molian. Q-switch Nd:YAG laser welding of AISI 304 stainless steel foils [J].Mat. Sci. Eng. A,2008,486(1-2):680-685

[5] . P. Paul,A. Khajepour. Automated laser fabrication of cemented carbide components[J]. Opt. Laser Technol., 2008, 40(5): 735-741.

[6] 徐斌,楼白杨,白万金等. 激光熔覆制备SiC/Ni基复合涂层及其耐冲蚀性能 [J]. 中国激光,2008,35(1):147-150

Xu Bin,Lou Baiyang,Bai Wangjin et al.. Synthesis of SiC/Ni composite coatings by laser cladding and property of erosion resistance [J]. Chinese J. Lasers,2008,35(1):147-150

[7] . Basu,J. Chakraborty,S. M. Shariff et al.. Laser surface hardening of austempered (bainitic) ball bearing steel[J]. Scripta Mater., 2007, 56(10): 887-890.

[8] A Roy Choudhury,Tamer Ezz,Lin Li. Synthesis of hard nano-structured metal matrix composite boride coatings using combined laser and sol-gel technology [J]. Mat. Sci. Eng. A,2007,445-446:193-202

[9] . . Microstructure and wear resistance of TaC reinforced Ni-based coating by laser cladding[J]. Surf. Coat. Technol., 2008, 202(10): 1918-1922.

[10] I. Manna,J. Dutta Majumdar,B. Ramesh Chandra et al.. Laser surface cladding of Fe-B-C,Fe-B-Si and Fe-BC-Si-Al-C on plain carbon steel [J]. Surf. Coat. Technol.,2006,201(1-2):434-440

[11] . 硼及其硼化物的应用现状与研究进展[J]. 材料导报, 2006, 20(6): 1-4.

. . The current situation and development of boron and borid[J]. Materials Review, 2006, 20(6): 1-4.

[12] . . Laser cladding of in situ TiB2/Fe composite coating on steel[J]. Appl. Surf. Sci., 2008, 254(20): 6489-6494.

[13] H. Erdem Camurlu,Filippo Maglia. Self-propagating high-temperature synthesis of ZrB2 or TiB2 reinforced Ni-Al composite powder [J]. J. Alloy. Compd.,2009,478(1-2):721-725

[14] 敬晓定,晁明举,孙海勤等. 原位生长Cr3C2-CrB复合增强镍基激光熔覆层研究 [J].中国激光,2009,36(1):231-237

Jing Xiaoding,Chao Mingju,Sun Haiqin et al.. Investigation on In-situ synthesis of Cr3C2-CrB reinforced Ni-based composite coatings by laser cladding [J]. Chinese J. Lasers,2009,36(1):231~237

[15] 晁明举,张献虎,杨宁等. 原位生成VC-VB-B4C复合颗粒增强镍基激光熔覆层 [J].中国激光,2008,35(11):1723-1729

ChaoMingju,Zhang Xianhu,Yang Ning et al.. In-situ synthesized VC-VB-B4C complex particulates reinforced Ni-based composite coating by laser cladding [J]. Chinese J. Lasers,2008,35(11):1723~1729

[16] 乐志强,薄胜民,王光建. 无机精细化学品手册 [M]. 北京:化学工业出版社,2001. 766-767

Le Zhiqiang,Bo Shengmin,Wang Guangjian. Handbook of Fine Inorganic Compounds [M]. Beijing:Chemistry Industry Press,2001. 766-767

[17] Sen Yang,Na Chen,Wenjin Liu,et al.. Fabrication of nickel composite coatings reinforced with TiC particles by laser cladding [J]. Surf. Coat. Technol.,2004,183(2-3):254-260

杨文超, 晁明举, 孙艳敏, 杨宁, 田得雨. 原位生成WB-CrB增强镍基激光熔覆层[J]. 激光与光电子学进展, 2010, 47(8): 081403. Yang Wenchao, Chao Mingju, Sun Yanmin, Yang Ning, Tian Deyu. In-Situ Synthesis of WB-CrB Reinforced Ni-Based Coatings by Laser Cladding[J]. Laser & Optoelectronics Progress, 2010, 47(8): 081403.

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