Abstract：Abstract: For the Cr18Mn6Ni4N austenitic stainless steel, the surface crack problem is easy to occur in the actual continuous casting production. In this study, the 20mm of the continuous casting blank was sampled, and the variation law of section shrinkage at different temperatures was measured by Gleeble3500. The results show that when the temperature range is 900-1250°C, the area shrinkage is higher, all are above 50%. When the temperature is lower than 900°C, the reduction in area is remarkably lowered. The equilibrium phase of Cr18Mn6Ni4N at different temperatures was calculated by Thermo-Calc software and the results of electron microscopy showed that the equilibrium phase M23C6 and Cr2(C,N) precipitated a lot when the temperature was lower than 900°C, which reduced the high temperature mechanical properties of Cr18Mn6Ni4N. This study is of great significance for understanding the high temperature characteristics of this steel grade and for developing a reasonable continuous casting process.
2019, Vol. 38 