논문 국내 국내일반학술지 냉간단조용 WC-Co 금형의 수명에 미치는 WC 분말의 미세구조 및 Co 부피 분율의 분석
- 학술지 구분 국내일반학술지
- 게재년월 2023-10
- 저자명 오정석*·박지니*·이상엽*·정중희*·최정묵**,† ·박준식* ,† *한밭대학교 신소재공학과, **㈜ 진합
- 학술지명 J. of the Korean Society for Heat Treatment.
- 발행처명 The Korean Society for Heat Treatment
- 발행국가 국내
- 논문언어 한국어
- 전체저자수 6
홈페이지첨부 파일
논문 초록 (Abstract)
In this study, we analyzed two types of cold forging dies commonly used for manufacturing general nuts and screws to investigate the differences in WC powder according to the lifespan. For both Type I and Type II dies, it was observed that as the lifespan of the molds increases, the area fraction of Co becomes larger and the size of the powder becomes smaller. Moreover, there is a trend where the strength also increases as the lifespan gets longer. Actually, the hardness value of the sample with the longest lifespan is ~ 131 HV higher than the specimen of the shortest lifespan, It is noted that the reduction in toughness of the WC-Co mold is caused by insufficient Co and the decrease in contact surface area of WC-Co results in a reduced bonding surface area. The lifespan of cold-working WC molds increases when the W content and the volume fraction of WC are high, and the size of the WC powder is small. The results can significantly enhance producing high-quality molds with an extended lifespan using WC powder for cold forging.