TiC瓷金主要由高硬度、高耐磨的碳化物以及提供適當韌性的金屬膠結相所組成，在工業上被廣泛運用在模具、車刀與耐磨工件上；雷射積層製造透過高能量雷射束將粉末熔融焊合，並且經由一層一層的堆疊，進而直接完成複雜形狀的立體工件。與傳統液相燒結相比，以雷射積層生產高品質的瓷金工件能夠節省大量的時間與後續加工成本，是近年來廣泛受到大家研究的題目。
本實驗主要使用成分TiC + Cr-Ni-Ti [1]，經由噴霧造粒法 (spray drying granulation) 自行製作符合雷射機台使用的碳化鈦瓷金粉末，在雷射機台上則是使用工研院研發的粉床式雷射機台來進行碳化鈦瓷金的雷射積層，經由相關雷射參數的調控製作出高品質的碳化鈦瓷金。期望透過雷射製程中快速冷卻的特性來減少晶粒成長的發生，進一步改善試片的微結構及機械性質並探討其雷射參數的影響；此外，本研究也會與傳統液相燒結試片做比較，觀察微結構以及機械性質上的差異，研究兩者不同製程上的各項優劣。

TiC cermets which composed of carbides and metals, are widely used as cutting tools in industry. Additive manufacturing uses high intensity laser beam to fuse material layer by layer. Thus, the complex 3D structure could be directly built. Comparing with the traditional liquid phase sintering, laser additive manufacturing has great potential to produce cermets since it could save time and reduce costs.
In this work, TiC cermets are made with spray drying granulation and selective laser melting. The study of granulation method and laser parameter are mainly to produce high quality cermets. The microstructure and the mechanical properties are also investigated. By the way, the 3D printing specimens are compared with those fabricated by liquid phase sintering for further discussion.

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