钛合金表面激光熔覆钴基复合涂层的组织和性能  

Microstructure and Properties of Co-Based Alloy Laser Clad Layer on Titanium Alloy Surface

作　　者：马海波 张维平 

机构地区：[1]Dalian Univ Technol, Sch Mat Sci & Engn, Dalian 116024, Peoples R China

出　　处：《稀有金属材料与工程》2010年第12期2189-2192,共4页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(50704009)

摘　　要：利用横流CO2激光器在钛合金表面制备出原位自生TiB体系陶瓷颗粒增强Co基复合材料涂层,以改善常规材料表面综合使用性能。采用XRD、SEM、EPMA等手段对复合涂层进行研究。结果表明:涂层中原位合成的TiB2和TiB陶瓷相均匀分布在γ-Co基合金涂层中。涂层内枝晶组织细小均匀,枝晶内和枝晶间存在明显的组织和成分差异。涂层显微硬度比基体显著提高,约为基体的3倍,同时耐磨性也得到显著改善。In-situ synthesized TiB system ceramic particle reinforced Co-based composite coating was prepared on titanium alloy surface by transverse flow CO(2) laser to improve the surface service performance of materials. The composite coating was studied by XRD, SEM and EPMA. Results show that in-situ synthesized TiB(2) and TiB major ceramic phases are dispersed homogeneously in the gamma-Co based alloy coating; they are very thin and uniform; there is obvious difference between the dendrites and the intergranular on the microstructure and composition. The microhardness of the coating is increased prominently, whose average value is about three times higher than that of the titanium alloy substrate. Wear resistance of the composite coating is significant improved.

关 键 词：钛合金 表面激光熔覆 钴基 复合涂层 组织细小 使用性能 Titanium Alloy Clad Layer 枝晶 复合材料涂层 CO2激光器 原位自生 原位合成 陶瓷相 颗粒增强 均匀分布 基体 合金涂层 成分差异 常规材料 

分 类 号：TG174.44[金属学及工艺—金属表面处理]