飞机钛合金运动件表面激光原位合成自润滑耐磨复合涂层的基础研究

项目名称： 飞机钛合金运动件表面激光原位合成自润滑耐磨复合涂层的基础研究

项目编号： No.U1533101

项目类型： 联合基金项目

立项/批准年度： 2016

项目学科： 无线电电子学、电信技术

项目作者： 刘秀波

作者单位： 中南林业科技大学

项目金额： 32万元

中文摘要： 本项目针对飞机钛合金运动部件耐磨性能不足的缺点，拟在钛合金（Ti-6Al-4V）表面制备金属陶瓷自润滑耐磨复合材料涂层并研究其组织结构与摩擦学性能。拟以高温抗氧化性能和强韧性优异的高温合金为基体、高温耐磨性能优异的陶瓷材料为增强相及高温自润滑性能优异的润滑颗粒为自润滑相，引入平顶光束，采用激光熔覆（Laser cladding）技术在钛合金表面制备金属陶瓷自润滑耐磨复合材料涂层，开展相关复合涂层的材料体系设计及其激光制备工艺研究。同时，建立描述激光制备工艺过程中陶瓷相与金属基体相互作用的力学模型，在对复合涂层制备工艺—组织结构—力学性能内在关系进行深入研究的基础上，研究出具有优异高温抗氧化性能、低摩擦系数和优异耐磨性能的复合涂层微结构组成及其激光制备工艺，为拓展钛合金在飞机关键运动部件的商业应用奠定材料和涂层制备技术基础。

中文关键词： 钛合金；激光加工；固体润滑；耐磨复合涂层；数值模拟

英文摘要： Concerning the poor wear resistance of the titanium alloy for aeroplane moving components, the project aims at the development of cermet high temperature self-lubrication anti-wear composite coatings on Ti6Al4V. The superalloy with excellent high temperature oxidation resistance and high strength and toughness will be used as matrix, the ceramic materials with excellent high temperature wear resistance as reinforced phase, and the solid lubricating with superior high temperature self-lubricating property as self-lubricating phase. The high energy laser bean with rectangular shape will be employed to fabricate cermet high temperature self-lubrication anti-wear composite coatings on the surface of titanium alloy by laser cladding and alloying, the corresponding research will be conducted on composite coatingsʼ materials design and the laser fabrication procedure, and the mechanical model describing the interaction between ceramic phase and metal substrate during the fabrication process will be established. On the basic of systematical research on the intrinsic relationship of the materials processing—microstructure—mechanical properties, the constitution of the composite coatings microstructure with excellent high temperature oxidation resistance, low friction coefficients and outstanding wear resistance capabilities as well as their laser fabricating technique, will be developed. Therefore, the foundation of materials and coating fabrication technique to broaden the commercial application of titanium alloys used as aeroplane key moving parts will be established.

英文关键词： Titanium alloy;Laser processing;Solid lubrication;Wear resistant composite coatings;Numerical simulation