|About this Abstract
||2020 TMS Annual Meeting & Exhibition
||Characterization of Minerals, Metals and Materials
||K-66: Effect of Antioxidant on Resistance to Ammonia Erosion of Carbon Sleeve in Continuous Annealing Furnace for Low Temperature Grain-oriented Silicon Steel Production
||He Mingsheng, Jing Zhang, Xuecheng Gong, Yong Lei, Shengjin Li
|On-Site Speaker (Planned)
Due to low heating temperature and low production cost, the low temperature grain-oriented silicon steel has been paid more and more attention. After low temperature heating, hot rolling, and cold rolling, the steel strip must be treated by continuous decarbonization annealing and nitriding in an atmosphere with NH3. Carbon sleeve is used as the best hearth rolls to support and convey steel strip. However, the carbon sleeve in nitriding zone is seriously corroded after a period of time, the surface roughness increases and the edge wears, which seriously affects the surface quality of products. Based on the working conditions, the causes and mechanism of corrosion on carbon sleeve by ammonia, and effects of antioxidants on surface quality of grain-oriented silicon steel are discussed. In terms of the resistance to ammonia, phosphate is not a good antioxidant for carbon sleeve in continuous annealing furnace for low temperature grain-oriented silicon steel production.