The erosion resistance properties of O'-Sialon-BN in molten steel are investigated in this work. According to experimental results and theoretical analysis, BN in O'-Sialon-BN plays an important role in the molten steel erosion resistance. And the erosion kinetics of the O'-Sialon-BN composites in molten steel is controlled by two stages: the first one is controlled by the chemical reaction taking place on the interface; the second one is controlled by diffusion. The erosion surface of materials is also investigated with fractal theory. The results show that the fractal dimensions of the erosion surface vary with the erosion time from a linear way to a parabolic way, which is related to the erosion mechanism change from interface chemical reaction to diffusion.
Q. Zhen, W.Z. Ding and W.C. Li (Shanghai Enhanced Laboratory of Ferrometallurgy, Shanghai University, Shanghai 200072, China) (University of Science and Technology Beijing, Beijing 100083, China)
