Investigation on band segregate formation during the electroslag remelting of H13 die steel

Investigation on band segregate formation during the electroslag remelting of H13 die steel

Kim, K.H. (TU Delft (OLD) MSE-3; Wuhan University of Science and Technology)
Wang, X. J. (Wuhan University of Science and Technology)
Li, G. Q. (Wuhan University of Science and Technology)
Liu, Y. (Wuhan University of Science and Technology)

2019

Band segregation has been found in the H13 die steel produced by the electroslag remelting (ESR) technology. Chemical and metallographic studies have been carried out on a one ton ESR ingot of H13 die steel, so as to understand the formation mechanism of the band segregation. The results indicate that the T.O content and S content decreased because of cleanliness improvement of ESR process. Transverse macrosegregation of S content decreased after ESR. The overall removal ratio of the inclusion is around 65.8%. The original complex inclusions would be modified to the CaO•Al₂O₃ inclusions. Al₂O₃ and MnS inclusions can be found after ESR. Both of Al₂O₃ and MnS inclusions were found to be the core of primary carbides. The net like structure in ESR ingot and banded structure in the forged steel were observed. V, Mo, Cr and S are rich in the segregation areas of ESR ingot. Besides, black and white segregation bands can be observed on the forged steel samples after etching. Uneven distribution of carbides rich in V, Mo and Cr was observed in banded structure.

http://resolver.tudelft.nl/uuid:a99cc4d6-1594-46b6-9afb-282e5f022f00

https://doi.org/10.1088/1757-899X/529/1/012064

1757-8981

IOP Conference Series: Materials Science and Engineering, 529 (1)

Joint 5th International Conference on Advances in Solidification Processes, ICASP 2019 and 5th International Symposium on Cutting Edge of Computer Simulation of Solidification, Casting and Refining, CSSCR 2019, 2019-06-17 → 2019-06-21, Salzburg, Austria

Institutional Repository

journal article

© 2019 K.H. Kim, X. J. Wang, G. Q. Li, Y. Liu