オーステナイト系ステンレスクラッド鋼板の界面近傍の炭素分布

抄録

The distribution of carbon in austenite stainless clad steel sheets which consist of austenite stainless steel (SUS304L) as a cladding steel and 0.01%C steel as a base steel was investigated by means of a computer aided electron probe micro analysis, chemical analysis and emission spectrophotometry. A peak of carbon content near the interface between base steel and cladding steel was observed after hot-rolling and after annealing subsequent to hot-and cold-rolling. A coarse grain region was observed in base steel near the interface. These results were compared to the results calculated by diffusion equations where the carbon diffusion through the interface was considered by a chemical potential gradient of carbon. The calculated results showed the existence of the carbon peak in cladding steel near the interface and a carbon decrease in base steel near the interface, and agreed with results observed. By the comparison between results calculated and observed, the calculation method was confirmed to be applicable to predicting carbon distribution in an austenite stainless clad steel sheet.