摘要
以钛粉、铝粉和碳化硼粉末为原料,采用同步同轴激光熔覆系统在Ti6Al4V钛合金表面制备含原位自生TiC、TiB以及TiAl金属间化合物增强钛基的Ti-C-B-Al复合涂层,研究了复合涂层的显微组织、物相构成、显微硬度和微纳米力学性能。结果表明,三种粉末在高能激光束的作用下充分反应并生成了TiC、TiB以及TiAl金属间化合物增强相。复合涂层表面光滑,涂层内部无气孔及裂纹,与基体间形成了良好的冶金结合,增强相在涂层内分布均匀,相比于基体,熔覆涂层具有较优的力学性能。涂层硬度在460HV_(0.3)~510HV_(0.3)之间,同时涂层的纳米力学性能与显微硬度具有较好的对应关系,其中当m(Ti)∶m(Al)∶m(B_(4)C)=84∶12∶4时,制得的涂层具有较优的力学性能。
The Ti-C-B-Al composite coatings containing in-situ autogenous TiC,TiB,and TiAl intermetallic compounds reinforced with titanium base were prepared on the surface of Ti6Al4V substrate using titanium powder,aluminum powder,and boron carbide powder as raw materials,and the microstructure,phase composition,microhardness and nanoindentation properties of the composite coatings were investigated using scanning electron microscopy,X-ray diffractometer,microhardness tester,and nanoindentation tester.The results showed that the three powders reacted adequately with the high-energy laser beam to produce TiC,TiB,and TiAl intermetallic compound reinforced phases.The surface of the compo-site coating is smooth,with no pores or cracks inside the coating,forming an excellent metallurgical bond with the substrate,the reinforcement phase is evenly distributed in the coating,and the cladding coating has better mechanical properties than the matrix.The hardness of the coating ranged from 460HV_(0.3) to 510HV_(0.3).At the same time,there is a good relationship between the nano-mechanical properties and microhardness.When the m(Ti)∶m(Al)∶m(B_(4)C)=84∶12∶4,the prepared coating has better mechanical properties.
作者
舒林森
张粲东
于鹤龙
张朝铭
SHU Linsen;ZHANG Candong;YU Helong;ZHANG Chaoming(School of Mechanical Engineering,Shaanxi University of Technology,Hanzhong 723001,Shaanxi,China;Shaanxi Key Laboratory of Industrial Automation,Hanzhong 723001,Shaanxi,China;School of Modern Technology,Mianyang City College,Mianyang 621000,Sichuan,China;National Key Laboratory for Remanufacturing,Army Academy of Armored Forces,Beijing 100072,China)
出处
《材料导报》
EI
CSCD
北大核心
2024年第2期173-177,共5页
Materials Reports
基金
国家自然科学基金(52075544)
陕西省教育厅专项科研计划项目(21JK0562)
陕西省工业自动化重点实验室开放课题研究基金(SLG-PT2019KF01-16)
国防科技重点实验室基金(JCKY61420052022)。
关键词
支撑膜原位合成
钛基复合涂层
激光熔覆
力学性能
support membrane in-situ synthesis
titanium-based composite coating
laser melting
mechanical property
