钛表面电火花沉积涂层的微观特征及性能  

Microstructure and Properties of Electrodeposited Coatings on Titanium Surface

作　　者：吴公一 于华[1,2] 张占领[1,2] 邱然锋[1,2] 张柯柯[1,2] 

机构地区：[1]河南科技大学材料科学与工程学院,河南洛阳471023 [2]河南科技大学有色金属共性技术河南省协同创新中心,河南洛阳471023

出　　处：《河南科技大学学报（自然科学版）》2017年第5期11-15,共5页Journal of Henan University of Science And Technology:Natural Science

基　　金：国家自然科学基金项目(U1294520);河南省杰出青年科学基金项目(074100510011)

摘　　要：在TA2基体表面电火花沉积制备WC涂层和CoCr/WC涂层,对比研究两种涂层的形貌、表面粗糙度、厚度、物相组成、显微硬度以及相对耐磨性。研究结果表明:CoCr/WC涂层比WC涂层缺陷少,界面结合较好。WC涂层和CoCr/WC涂层表面粗糙度分别约为7.887μm和7.445μm。WC涂层和CoCr/WC涂层厚度分别约为20μm和40μm。WC涂层表面主要由W_2C、TiC和W等物相组成,CoCr/WC涂层表面主要由W_2C、Co_3W_3C和W等物相组成。WC涂层表面和CoCr/WC涂层表面显微硬度值最大分别达970HV和1040HV。WC涂层和CoCr/WC涂层的相对耐磨性分别为2.5和3.2。制备WC涂层和CoCr/WC涂层使基体表面性能发生改变,CoCr/WC涂层的综合性能优于WC涂层。WC coating and CoCr/WC coating were prepared on the surface of TA2 basis material by electro spark deposition. The morphology,surface roughness,thickness,phase composition,microhardness and relative wear resistance of the two coatings were compared. The results show that the CoCr/WC coating has fewer defects and better interfacial bonding than WC coating. The surface roughness of WC coating and CoCr/WC coating is about 7. 887 μm and 7. 445 μm,respectively. The thickness of WC coating and CoCr/WC coating is about 20 μm and 40 μm respectively. The surface of WC coating is mainly composed of W_2C,TiC and W. The CoCr/WC coating is mainly composed of W_2C,Co_3W_3C and W. The highest microhardness of WC coating surface is 970 HV,and the highest microhardness of CoCr/WC coating is 1 040 HV. The relative wear resistance of WC coating and CoCr/WC coating is respectively 2. 5 and 3. 2. WC coating and CoCr/WC coating make the surface properties of the substrate change,and the comprehensive performance of CoCr/WC coating is better than that of WC coating.

关 键 词：TA2 WC COCR 电火花沉积 复合涂层 界面行为 性能 

分 类 号：TG455[金属学及工艺—焊接]