激光熔覆技术在制备原位自生颗粒增强金属基耐磨复合涂层领域具有良好的应用前景.以廉价钛铁和石墨为熔覆粉末,采用横流CO2激光器在低碳钢基体上制备了TiC增强Fe基复合涂层,并对涂层物相组织和TiC增强相的形成机制进行了研究.结果表明,增强相TiC通过原位冶金反应形成,在熔体的冷却过程中析出长大,具有树枝晶和鱼骨状两种形态.树枝晶形态的TiC为熔体先析出相,其生长形态受界面前沿成分过冷和晶体生长习性控制.鱼骨状TiC由δ-Fe和TiC的准共晶反应形成,溶质原子扩散特征和晶面能决定了共晶TiC的最终鱼骨状形貌.均匀弥散分布的TiC增强相有助于提高涂层的耐磨损性能.
参考文献
| [1] | S. Nayak;Narendra B. Dahotre .The Laser-Induced Combustion Synthesis of Iron-Oxide Nanocomposite Coatings on Aluminum[J].JOM,2002(9):39-41. |
| [2] | Pei YT.;Zuo TC. .Gradient microstructure in laser clad TiC-reinforced Ni-alloy composite coating[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,1998(1/2):259-263. |
| [3] | HEUNG-IL PARK;KAZUHIRO NAKATA;SHOGO TOMIDA .In situ formation of TiC particulate composite layer on cast iron by laser alloying of thermal sprayed titanium coating[J].Journal of Materials Science,2000(3):747-755. |
| [4] | 李昂,李安,张凌云,王华明.激光熔化沉积NiTi/Ni3 Ti金属间化合物合金的显微组织和耐磨性[J].中国有色金属学报,2006(05):867-873. |
| [5] | Anoop N. Samant;Baoshuai Du;Narendra B. Dahotre .In-situ surface absorptivity prediction during 1.06 pm wavelength laser low aspect ratio machining of structural ceramics[J].Physica Status Solidi, A. Applied Research,2009(7):1433-1439. |
| [6] | Anoop N. Samant;Baoshuai Du;Sameer R. Paital;S. Kumar;Narendra B. Dahotre .Pulsed laser surface treatment of magnesium alloy: Correlation between thermal model and experimental observations[J].Journal of Materials Processing Technology,2009(11):5060-5067. |
| [7] | 张维平,刘硕.激光熔覆Fe-Ti-B复合材料涂层的组织[J].中国有色金属学报,2005(04):558-564. |
| [8] | 张维平,马海波,陈天运,郎志华.激光熔覆原位生成硬质陶瓷颗粒钴基复合涂层[J].中国激光,2009(12):3277-3281. |
| [9] | 赵高敏,王昆林,刘家浚.La2O3对激光熔覆铁基合金层硬度及其分布的影响[J].金属学报,2004(10):1115-1120. |
| [10] | 王晓荣,王新洪,侍国文,徐晓脍.硼对激光熔覆Fe-Ti-V-C合金系组织和性能的影响[J].中国激光,2010(07):1903-1907. |
| [11] | 吴朝锋,马明星,刘文今,钟敏霖,张伟明,张红军.激光原位制备复合碳化物颗粒增强铁基复合涂层及其耐磨性的研究[J].金属学报,2009(08):1013-1018. |
| [12] | H.C. Man;S. Zhang;F.T. Cheng .MICROSTRUCTURE AND FORMATION MECHANISM OF IN SITU SYNTHESIZED TiC/Ti SURFACE MMC ON Ti-6Al-4V BY LASER CLADDING[J].Scripta materialia,2001(12):2801-2807. |
| [13] | Anshul Singh;Narendra B. Dahotre .Phase Evolution during Laser In-Situ Carbide Coating[J].Metallurgical and Materials Transactions, A. Physical Metallurgy and Materials Science,2005(3a):797-803. |
| [14] | Baoshuai Du;Sameer R. Paital;Narendra B. Dahotre .Phase constituents and microstructure of laser synthesized TiB_2-TiC reinforced composite coating on steel[J].Scripta materialia,2008(10):1147-1150. |
| [15] | 吴朝锋,马明星,吴爱平,刘文今,钟敏霖,张伟明,张红军.激光原位制备颗粒增强铁基复合涂层中碳化物相的形貌分析[J].金属学报,2009(09):1091-1098. |
| [16] | Balluffi R W;Allen S M;Carter W C.Kinetics of Ma-terials[M].New Jersy:John Wiley & Sons,2005 |
| [17] | Chen Y;Wang H M .Growth morphology and mechanism of primary TiC carbide in laser clad TiC/FeAl composite coa-ting[J].Materials Letters,2003,57(5-6):1233. |
| [18] | Scandella F;Scandella R.Development of hardfacing material in Fe-Cr-Nb-C system for use under highly abrasive conditions[J].Materials Science and Technology,2004(20):93. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%