摘要
The low-carbon magnesia-carbon （MgO-C） composites containing 3% （mass fraction, the same below） carbon were prepared by adding various types of carbon black （CB）. The mechanical properties, oxidation resistance at 1 100 ℃ in oxidizing atmosphere, and thermal shock resistance after 5 times dipping in 1 600 ℃molten steel of the low-carbon composite samples were investigated, compared with a commercial high-carbon MgO-C composite contai- ning carbon of 16 %. The results show that the mechanical properties, oxidation resistance and thermal shock resist- ance of the low-carbon samples are improved with the decrease of CB particle size. Thermal shock resistance of the low-carbon sample containing nanometer CB N220 is obviously better than that of other low-carbon samples, and rea- ches the level of the high-carbon samples.
The low-carbon magnesia-carbon （MgO-C） composites containing 3% （mass fraction, the same below） carbon were prepared by adding various types of carbon black （CB）. The mechanical properties, oxidation resistance at 1 100 ℃ in oxidizing atmosphere, and thermal shock resistance after 5 times dipping in 1 600 ℃molten steel of the low-carbon composite samples were investigated, compared with a commercial high-carbon MgO-C composite contai- ning carbon of 16 %. The results show that the mechanical properties, oxidation resistance and thermal shock resist- ance of the low-carbon samples are improved with the decrease of CB particle size. Thermal shock resistance of the low-carbon sample containing nanometer CB N220 is obviously better than that of other low-carbon samples, and rea- ches the level of the high-carbon samples.
基金
Item Sponsored by National Natural Science Foundation of China(50572032)
