- 期刊
高磁通密度50A600電磁鋼片的開發
Development of 50A600 Grade Non-Oriented Electrical Steels with High Flux Density
摘要
電磁鋼片是製造馬達與變壓器鐵芯的材料，品質目標是本研究經由探討熱軋製程參數對電磁鋼片的集合組織與磁性的影響，開發兼具高磁通與低鐵損的50A600電磁鋼片。結果顯示：熱軋板累積的塑性應變能對熱軋板盤捲階段再結晶機構有顯著的影響，低應變能時由應變引發的晶界移動主導再結晶過程，可形成粗大的晶粒與很強的｛100｝〈110〉集合組織。熱軋板晶粒徑愈大，冷軋退火時再結晶成核密度愈低，但是｛110｝〈001〉與｛100｝〈uvw〉晶粒的成核機率卻愈高，可以得到高磁通密度與低鐵損的產品。經由實際生產證實，採用最適化熱軋製程產出的50A600電磁鋼片，與一般相同鐵損值的電磁鋼片相較，磁通密度提高了0.02～0.03tesla。中鋼每年生產八萬噸的50CS600電磁鋼片。下游客戶使用中鋼電磁鋼片，可以達成降低銅損、節約能源的目標。
並列摘要
50A600 grade non-oriented electrical steels having high magnetic flux density have been developed in China Steel. The developing strategy is to optimize hot rolling practice. Experimental results indicated that strain-induced boundary migration, SIBM, was the main mechanism corresponding to the recrystallization process for hot bands with low stored energy of deformation. Hot bands in which SIBM was the dominant mechanism of recrystallization possessed the largest grain size, and strongest textures with a major component of {100} ＜110＞. Large grain size of hot bands promotes the nucleation of {110} ＜001＞ and {100} ＜uvw＞ grains in annealing after cold rolling, which result s in electricaI steels having a B50 value as high as 1.73 tesla while that of the ordinary one is only about 1.70 telsa.