摘要
The precipitates and hydrogen permeation behavior in three kinds of hot rolled low carbon heavy plate steels for enameling were analyzed; then, both sides of the steels were enameled. The experimental results show that a large amount of coarse Ti4 Cz $2 and fine Ti（C, N） particles exist in the optimized Ti-bearing steel, quite a lot of fine Ti（C,N） particles exist in the optimized carbon steel, but only a little bit fine Ti（C,N） particles exist in the carbon steel. The fishscaling resistance of the steels can be correlated to the effective hydrogen diffusion coefficient, and a model of correlation between the effective hydrogen diffusion coefficient and the volume fraction of the precipitates was established and verified. The effective hydrogen diffusion coefficient should be lower than 3.96×10-6 cm2/s to avoid fishscaling in heavy plate steels.
The precipitates and hydrogen permeation behavior in three kinds of hot rolled low carbon heavy plate steels for enameling were analyzed; then, both sides of the steels were enameled. The experimental results show that a large amount of coarse Ti4 Cz $2 and fine Ti（C, N） particles exist in the optimized Ti-bearing steel, quite a lot of fine Ti（C,N） particles exist in the optimized carbon steel, but only a little bit fine Ti（C,N） particles exist in the carbon steel. The fishscaling resistance of the steels can be correlated to the effective hydrogen diffusion coefficient, and a model of correlation between the effective hydrogen diffusion coefficient and the volume fraction of the precipitates was established and verified. The effective hydrogen diffusion coefficient should be lower than 3.96×10-6 cm2/s to avoid fishscaling in heavy plate steels.
