Effects of Basicity and B2O3 on the Crystallization and Heat Transfer Behaviors of Low Fluorine Mold Flux for Casting Medium Carbon Steels
Abstract
An investigation was carried out to study the effects of basicity (CaO/Si2O) and B2O3 on the crystallization and heat transfer behaviors of low fluorine mold flux for casting medium carbon steels. The double hot thermocouple technique (DHTT) was employed to study the crystallization behavior of mold flux with a different basicity and B2O3 content, under the simulated thermal gradient as in a real caster. The infrared emitter technique (IET) was also applied for the study of heat transfer behavior of the above mold fluxes. By combining the results of IET and DHTT, this article indicated that the increase of basicity would decrease the general heat transfer rate of mold flux, as it tends to promote crystallization of mold flux apparently, while B2O3 has the opposite function. The combined effects of basicity and B2O3 could be used to adjust the general crystallization and heat transfer properties of low fluorine mold flux for casting medium carbon steels, which would provide an instructive way for the design of Fluorine free mold flux for casting medium carbon steels.
- Publication:
-
Metallurgical and Materials Transactions B
- Pub Date:
- April 2013
- DOI:
- 10.1007/s11663-012-9784-6
- Bibcode:
- 2013MMTB...44..365L