The green body of WC-Co cemented carbides containing polymeric binders such as paraffin, polyethylene glycol (PEG), and polyvinyl acetate (PVA) are prepared. The green density of the WC-Co cemented carbides increases with the addition of binders, with the exception of PVA, which is known to be a polar polymeric substance. The green strength of the WC-Co cemented carbides improves with the addition of paraffin and a mixture of PEG400 and PEG4000. In contrast, the green strength of the WC-Co does not increase when PEG400 and PEG4000 is added individually. The compressive strength of the green body increases to 14 MPa, and the machinability of the green body improves when more than 4–6 wt% paraffin and a mixture of PEG400 and PEG4000 is used. Simultaneously, the sintered density of WC-Co is as high as 99% relative density, similar to a low binder addition of 1–2 wt%.

Abstract
1. 서 론
2. 실험방법
3. 결과 및 고찰
4. 결 론
감사의 글
References

• 임영수(국립안동대학교 신소재공학부) | Young-Soo Lim (School of Advanced Materials Engineering, Industrial Technology Center for Environment-friendly Materials, Andong National University)
• 안선용(한국야금) | Sun-Yong Ahn (KORLOY, 55)
• 임재석(국립안동대학교 신소재공학부, 친환경신소재산업지원센터) | Jae-Suk Lim (School of Advanced Materials Engineering, Industrial Technology Center for Environment-friendly Materials, Andong National University)
• 백용균(국립안동대학교 신소재공학부, 친환경신소재산업지원센터) | Yeong-Kyeun Paek (School of Advanced Materials Engineering, Industrial Technology Center for Environment-friendly Materials, Andong National University)
• 정태주(국립안동대학교 신소재공학부, 친환경신소재산업지원센터) | Tai-Joo Chung (School of Advanced Materials Engineering, Industrial Technology Center for Environment-friendly Materials, Andong National University) Corresponding author