Abstract: The side dam technology of the twin-roll strip casting is discussed. The cause of the abrade wear and crack of the side dam are analyzed, and two type structure of side dam such as integral type and combined type were taken into experience. The results showed that the combined type of side dam is good to improve the process stability and prolong the op-erating life. The corrosion of the side dam in difference steel grade is investigated, and difference kinds of refractory are checked in the experience, in conclude, the zirconium oxide side dam is the best material in combination property to fit for the strip casting compared with the different refractory. Using the ANSYS finite element analysis software, thermal analysis and thermal stress analysis of side dam in the strip casting process are carried out to explain the cause of side dam cracking.

Key words: Cracking, FEM, Side dam technology Refractory, Thermal stress, Twin-roll strip casting steel