Prediction Model for Degree of Solid-shell Unevenness during Initial Solidification in the Mold
SCIE
SCOPUS
- Title
- Prediction Model for Degree of Solid-shell Unevenness during Initial Solidification in the Mold
- Authors
- Kwon, Sang-Hum; Won, Young-Mok; Back, Gu Seul; Kim, Hyeju; Lee, Jae Sang; Kim, Dong-Gyu; HEO, YOON UK; Yim, Chang Hee
- Date Issued
- 2021-10
- Publisher
- Nippon Tekko Kyokai/Iron and Steel Institute of Japan
- Abstract
- The unevenness of the solid-shell and heat flux (Phi(q)) during solidification were measured for various steel grades with casting apparatus. Then the data were used to develop a model to predict the degree of solid-shell unevenness according to the steel composition. The surface of the solid-shell was the least uniform when the steel composition was near the peritectic point, at which Phi(q) was the lowest. A model to calculate an index of solid-shell unevenness was developed under the following conditions. Solid-shell unevenness is formed at the initial solidification under the constant cooling rate, which occurs only where solid fraction (fs) is from 0.9 to 1.0. In addition, solid-shell unevenness is proportional to the amount of phase transformation and inversely proportional to the temperature range of Delta T-PT; between the temperature of fs = 0.9 and the solidus temperature. This model shows about 87% of the prediction accuracy in the experimental results of this study and also gives reasonable explanations of solid-shell unevenness observed in previous researches on steels.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/107667
- DOI
- 10.2355/isijinternational.isijint-2021-155
- ISSN
- 0915-1559
- Article Type
- Article
- Citation
- ISIJ International, vol. 61, no. 10, page. 2534 - 2539, 2021-10
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- There are no files associated with this item.
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