摘要
利用半导体激光器在TC4钛合金表面激光熔覆Ni60＋Ti3Si C2混合粉末,成功制备了Ni基自润滑复合涂层。利用OM、SEM、XRD、EDS等分析了涂层的微观组织及物相组成,利用显微硬度计和摩擦磨损试验机测试了涂层的显微硬度和摩擦磨损性能。结果表明：不同Ti3Si C2含量的涂层主要由TiC、TiB2、Ti5Si3、Ti3SiC2、γ-Ni基体等物相组成,涂层组织分布致密均匀;涂层的显微硬度显著提高主要归功于TiC、TiB2硬质相的存在,当Ti3SiC2含量为7.5%时显微硬度最高,为1150 HV0.2;当Ti3SiC2含量为10%时,摩擦因数稳定在0.26~0.30,磨损量最小为1.2 mg。
Ni60-based self-lubricating composite coating was successfully prepared by laser cladding Ni60＋Ti3SiC2powder on TC4 titanium alloy surface by a diode laser.The microstructure and phase composition of the coating were analyzed by means of OM,SEM,XRD and EDS.The microhardness and tribological wear properties of the coating were tested by microhardness tester and wear tester.The results show that,the coating with different Ti3SiC2contents is mainly composed of TiC,TiB2,Ti5Si3,Ti3SiC2,γ-Ni phases and so on,and the coating microstructure is dense and uniform.Due to the existence of TiC,TiB2hard phases,the hardness of the coating is greatly increased,and when the Ti3SiC2content is 7.5%,the microhardness is the highest as 1150 HV0.2.When the Ti3Si C2content is 10%,the friction coefficient is stable at 0.26-0.30,and the minimum wear mass loss is 1.2 mg.
作者
李眉葭
孙荣禄
牛伟
周丹丹
Li Meijia;Sun Ronglu;Niu Wei;Zhou Dandan(School of Mechanical Engineering,Tianjin Polytechnic University,Tianjin 300387,China;Tianjin Area Major Laboratory of Advanced Mechatronics Equipment Technology,Tianjin 300387,China)
出处
《金属热处理》
CAS
CSCD
北大核心
2018年第10期179-184,共6页
Heat Treatment of Metals
基金
国家自然科学基金(51371125)
