王彦峰,李争显,杜继红,张长伟.TC4钛合金表面渗碳复合TiN(Ti)膜层的抗冲蚀性能研究[J].稀有金属材料与工程,2019,48(6):1878~1883.[Yanfeng Wang,Zhengxian Li,Jihong Du,Changwei Zhang.Solid particle erosion of composite coating of gradient carburized layer and TiN(Ti) coating synthesized on TC4 alloy[J].Rare Metal Materials and Engineering,2019,48(6):1878~1883.]
TC4钛合金表面渗碳复合TiN(Ti)膜层的抗冲蚀性能研究
投稿时间:2018-07-12  修订日期:2018-08-14
中文关键词:  离子渗碳,Ti/TiN膜层,固体颗粒冲蚀,多层结构,韧性
基金项目:科技部中乌国际合作项目,2014DFR50450
中文摘要:
      硬质膜层能够显著提高飞机发动机钛合金叶片的抗固体颗粒冲蚀性能,现有的软基体/硬膜层体系由于较高的脆性及界面不匹配性很容易被冲蚀,膜基界面极易发生脆性剥落。为了改善硬质膜层的抗冲蚀性能,结合辉光离子扩渗及等离子增强电弧离子镀技术,本文在TC4合金表面制备了具有梯度渗碳及TiN(Ti)膜层的复合渗镀层,并表征了结构对于复合渗镀层性能的影响。结果表明,相对于未强化的TC4基体表面单层TiN及12周期复合Ti/TiN膜层,复合渗镀层的显微硬度及膜基结合强度均同步得到了提高。冲蚀试验结果表明,TC4基体未渗碳前,表面单层TiN膜层呈现出脆性冲蚀开裂机制,12层复合Ti/TiN膜层由于多层复合结构的增韧效应,呈现出层状剥落及“冲蚀窝”损伤形貌。渗碳后,复合渗镀层的抗冲击韧性得到提高,单层TiN膜层在冲蚀条件下的膜基界面脆性开裂明显被抑制。渗碳复合12周期复合Ti/TiN结构的复合渗镀层具有最佳的抗固体颗粒冲蚀性能,表现出明显的韧性损伤机制,冲蚀失重率降低了十余倍。抗冲蚀性能的提高可归结于复合渗镀层较高的表面硬度、界面强度和强韧性匹配。
Solid particle erosion of composite coating of gradient carburized layer and TiN(Ti) coating synthesized on TC4 alloy
英文关键词:plasma  carburization, Ti/TiN  coating, solid  particle erosion, multilayered  structure, toughness
英文摘要:
      Solid particle erosion (SPE) resistance of compressor titanium alloy blade can be enhanced by the hard coatings. But the system of hard coating / soft substrate is easily corrupt by the SPE due to the coatings’ higher brittleness and interface mismatch, so the brittle fracture often occurs at the interface of coating and substrate. In order to improve the hard coatings’ SPE resistance, combining with the plasma ion diffusion and arc ion plating technology, a series of composite coatings with gradient carburized layer and TiN(Ti) coating were synthesized on TC4 alloy. And the influence of structure on composite coating’s properties was studied in detail. The results showed that the hardness and bonding strength of composite coatings were enhanced remarkably, comparing with the monolayer TiN and 12 periods of Ti/TiN hard coatings deposited on TC4 alloy without plasma carburization. The monolayer TiN showed a mechanism of brittle cracking after sand erosion, and the 12 periods of Ti/TiN coating presents morphologies of flaking and erosion pit due to the multilayer toughening effect. After carburization, the coating’s impact toughness was enhanced. The interface fracture of monolayer TiN was restrained. And the composite coating with gradient carburized layer and 12 periods of Ti/TiN coating possessed the best SPE resistance with erosion weight loss rate decreased by more than ten times and showed a mechanism of tough damage, which can be attributed to its higher interface strength and better match of hardness and toughness.
作者单位E-mail
王彦峰 西北有色金属研究院 yfwang420@163.com 
李争显 西北有色金属研究院  
杜继红 西北有色金属研究院  
张长伟 西北有色金属研究院  
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