CAJ | 학술논문

以Ti+Ni+B4C粉末混合物为原料,利用激光熔覆技术在TA15钛合金基材表面制得TiB-TiC共同增强TiNi-Ti2Ni金属间化合物复合涂层.采用OM、SEM、XRD、EDS及AFM等手段分析激光熔覆涂层的显微组织及磨损表面,测试涂层的室温干滑动磨损性能.结果表明,激光熔覆TiB-TiC增强TiNi-Ti2Ni金属间化合物复合涂层熔覆具有独特的显微组织,菊花状的TiB-TiC共晶均匀分布在TiNi-Ti2Ni双相金属间化合物基体中.由于高硬、高耐磨TiB-TiC陶瓷相与高韧性TiNi-Ti2Ni双相金属间化合物基体的共同配合,激光熔覆涂层表现出优异的耐磨性.
이Ti+Ni+B4C분말혼합물위원료,이용격광용복기술재TA15태합금기재표면제득TiB-TiC공동증강TiNi-Ti2Ni금속간화합물복합도층.채용OM、SEM、XRD、EDS급AFM등수단분석격광용복도층적현미조직급마손표면,측시도층적실온간활동마손성능.결과표명,격광용복TiB-TiC증강TiNi-Ti2Ni금속간화합물복합도층용복구유독특적현미조직,국화상적TiB-TiC공정균균분포재TiNi-Ti2Ni쌍상금속간화합물기체중.유우고경、고내마TiB-TiC도자상여고인성TiNi-Ti2Ni쌍상금속간화합물기체적공동배합,격광용복도층표현출우이적내마성.
A wear resistant TiB-TiC reinforced TiNi-Ti2Ni intermetallic matrix composite coating (TiB-TiC/TiNi-Ti2Ni) was prepared on Ti-6.5Al-2Zr-1Mo-1V titanium alloy by the laser cladding process using Ti+Ni+B4C powder blends as the precursor materials.Microstructure and worn surface morphologies of the coating were characterized by optical microscopy (OM),scan electron microscopy (SEM),X-ray diffraction (XRD),energy dispersive X-ray analysis (EDS) and atomic force microscopy (AFM).Wear resistance of the coating was evaluated under dry sliding wear test condition at room temperature.The results indicate that the laser clad coating has a unique microstmcture composed of flower-like TiB-TiC eutectic ceramics uniformly distributed in the TiNi-Ti2Ni dual-phase intermetallic matrix.The coating exhibits an excellent wear resistance because of combined action of hard TiB-TiC eutectic ceramic reinforcements and ductile TiNi-Ti2Ni dual-phase intermetallic matrix.