BAF 燒鈍의 傳熱特性과 冷延鋼板의 表面淸淨度에 관한 硏究 = A Study on the Surface Cleanness of Cold Rolled Steel Sheet and Characteristics of Heat Transfer in the Batch Annealing

다국어 초록 (Multilingual Abstract)

A cold spot temperature control system for the BAF(batch annealing furnace) has been established in order to reduce energy consumption to improve productivity and stabilize the properties of products. Therefore we confirmed for the improving of material quality (eq. even and consistent tempering, high surface cleanliness, reduced carbon depositing etc.), increasing of output, comparison of annealing cycle time, reducing of annealing cost and distribution of cold spot temperature according toe BAF type.
The use of hydrogen instead of nitrogen as the protective gas, combined with high convection in batch annealing furnaces, has shown that considerable increases in furnace output and material quality are attainable. Owing to the low density, high diffusion and reducing character of hydrogen, a better transfer resulting in uniform material temperatures and improved coil surfaces can be achieved.