Samples were taken from the RH refining process,tundish and ingot,the changes in the number,size and type of inclusions were statistically analyzed by using scanning electron microscopy,metallographic microscopy and nitro-gen-oxygen analyzer as well as the T[O]content during the refining of conventional grain-oriented silicon steel.From the entry into the RH station to the formation of the ingot,the T[O]content in the steel gradually decreased to 0.001 5% .The de-oxidation products at the RH station entry were predominantly Al2O3-SiO2.The inclusions in the steel at the RH station exit,within the tundish and in the ingot were primarily composed of Al2O3-SiO2-CaO and Al2O3-SiO2-CaO-MgO.The number of inclusions in the steel progressively reduced from the RH station entry to the ingot.Inclusions larger than 20 μm in size were almost entirely floated out after exiting the RH station.The size of inclusions in the tundish and ingot were found to be pre-dominantly less than 10 μm.
关键词
取向硅钢/钢中全氧/夹杂物
Key words
Oriented silicon steel/Oxygen content in steel/Inclusions
维普
万方数据