抄録
In order to obtain informations on the change of oxide inclusions in steels by annealing at high temperatures, synthetic oxide slags were embeded into various alloys. After annealing at high temperature, the size and shape of precipitates were observed microscopically and changes of both compositions were analysed by EPMA. Results obtained here are as follows:(1) Oxide particles precipitated in a layer around the embeded oxide. The thickness of the precipitation layer broadened with increases of time, temperature and FeO content in oxide, and shortened with decrease of initial concentration of alloying element in the alloy.(2) The precipitates had various shapes including sphere, and the size increased with time and temperature. FeO content in precipitates decreased as the precipitate departed from the oxide/alloy interface, and concentration of alloying element in the alloy near the precipitates became far lower than the initial concentration.(3) FeO content in the embeded oxide decreased. Besides, it was observed that silicon transfered from the oxide into alloy.
