摘要
以Ni79Ti21(wt%)合金粉末为原料,采用同步送粉激光熔敷技术在BT20钛合金表面制备出NiTi/Ni3Ti金属间化合物复合材料涂层,分析了该涂层的显微组织,测试了该涂层的室温干滑动磨损性能。结果表明,激光熔敷涂层组织均匀致密,与基材呈良好的冶金结合,具有优良的抗滑动磨损性能。
Wear-resistant NiTi/Ni_3Ti intermetallic composite coating was fabricated on substrate of a titanium alloy BT20 by laser cladding.Microstructure of the NiTi/Ni_3Ti intermetallic composite coating was characterized and the room-temperature dry sliding wear-resistance was evaluated coupling with hardened bearing steel GCr15.The coating has a homogeneous microstructure and is metallurgically bonded to the titanium alloy substrate.Wear-resistance of the composite coating is superior to BT20 titanium alloy under dry sliding wear test conditions.The excellent wear resistance of the laser clad NiTi/Ni_3Ti intermetallic composite coating is attributed to the combination of high strength and toughness of intermetallics of NiTi and Ni_3Ti.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2006年第5期87-90,共4页
Transactions of Materials and Heat Treatment
基金
国家自然科学基金项目(54071006)
航空基础科学基金项目(05H51009)
