Microstructure of Spinel SEN Used for Casting High-oxygen, Calcium-treated, Free-cutting and High-manganese Steels

摘要

The microstructure of the spinel inner wall and spinel-C submerged part of the SEN after casting high-oxygen steel, calcium-treated steel, free-cutting steel and high-manganese steel were investigated. It was observed that the structure of the hot face became denser than that before use and spinel showed almost no reaction with these steels.