고온압연공정에서 강종 및 감면율 변화에 따른 마찰계수 변화 분석Analysis of Friction Coefficient Dependent on Variation of Steel Grade and Reduction Ratio in High Temperature Rolling Process
- Authors
- 허종욱; 이형직; 나두현; 이영석
- Issue Date
- 2009
- Publisher
- 한국소성가공학회
- Keywords
- High Temperature Rolling; Finite Element Analysis; Friction Coefficient; Width Spread; Reduction Ratio
- Citation
- 소성가공, v.18, no.5, pp 410 - 415
- Pages
- 6
- Journal Title
- 소성가공
- Volume
- 18
- Number
- 5
- Start Page
- 410
- End Page
- 415
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/32922
- ISSN
- 1225-696X
2287-6359
- Abstract
- Experimental and numerical studies were performed to examine the effect of material temperature and reduction ratio on friction coefficient during hot flat rolling. We carried out a single pass pilot hot flat rolling test at the temperatures range of 900~1200℃ and measured the spread of deformed material while reduction ratio varied from 20% to 40%. Materials used in this study were a high carbon steel and two alloy steels. The dimension of specimen used in hot rolling experiment was 50mm×50mm×300mm. We performed a series of finite element simulation of the hot rolling process to compute the friction coefficient change in terms of steel grade and reduction ratio. Results showed that temperature dependency of friction coefficient is not noteworthy but the effect of reduction ratio on friction coefficient is quite large. For high carbon steel, friction coefficient at reduction ratio of 30% is lower than that at that of 20%. Meanwhile friction coefficient at reduction ratio of 40% was one and half times large compared with that at that of 20%. The effect of steel grade on friction coefficient was significant when reduction ration was large, e.g., 40%
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Collections - College of Engineering > School of Mechanical Engineering > 1. Journal Articles
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