| Title |
Research Paper - Welding & Joining - : Densification of WC - TiC Compound with Ni as Binding Metal |
| Authors |
공명호(Myeong Ho Kong); 황선근(Sun Keun Hwang); 박원구(Won Koo Park); 이억섭(Ouk Sub Lee); 김병기(Byung Kee Kim) |
| Abstract |
Complex tungsten carbides of fine grain sire and Ni as a binding metal were developed with TiC and SiC as additives. The process to produce cemented carbides based on (W-Si-Ti)C-10wt.%Ni consisted of mixing W and TiC powders with liquid glass(SiO₂) and carbon powder and carburizing at 1500∼1550℃ to form SiC coating, adding 10wt.% of Ni powders and sintering. As a result, we obtained a fine grain size in the range of 0.4∼1.0 ㎛, a high micro-Vickers hardness of 1830 ㎏/㎟ and a relative density higher than 97%. TiC appeared to retard grain growth and enhance hardness by forming (W, Ti)C and Ni₃Ti. This was evidenced by the morphological features of (W, Ti)C and WC phases as well as the distribution characteristics of the elements observed by electron microscopy. |