| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
Segregation in Steels
|
| Presentation Title |
F-2: Study on Formation Mechanism and Control of Freckle in Electroslag Remelting Process of Low Alloy and High Strength Steel |
| Author(s) |
Yang Wang, Lang Shui, Xianghua Luo, Yi He, Huasong Liu, Kailun Zhang |
| On-Site Speaker (Planned) |
Yang Wang |
| Abstract Scope |
Freckle is a type of channel macro-segregation that is a common solidification defect in electroslag remelted ingots. Currently, the freckle has emerged as a key quality issue limiting the production of large and ultra-large electroslag remelted ingots. Apart from the large difference in the casting processes, most of the existing macro-segregation theories for the freckle are not suitable to the electroslag remelting process. In order to reduce the detection rate of freckle in the process of producing low-alloy high-strength steel in a steel mill somewhere, thermodynamic calculation and dynamic model were carried out, and the formation mechanism of freckle in low-alloy high-strength steel was studied combined with industrial tests. By reducing the melting rate, enhancing the cooling intensity, and improving the performance of the slag system, the formation of spots was controlled, the detection rate of spots was effectively reduced, and the surface quality was finally excellent. |