利用电子束冷床炉熔炼大规格纯镍扁锭(6600 mm×1050 mm×210 mm),研究了熔炼工艺参数(电子枪功率与拉锭速度的配合)对镍扁锭中碳(C)元素偏析的影响及机理。结果表明:电子枪功率与拉锭速度配合不当会导致镍扁锭中C元素出现不同程度的偏析;协调各区域的电子枪功率和选择适当的拉锭速度可以使镍扁锭中C元素分布更为均匀;当冷床熔炼区域、溢流区域、结晶器区域的电子枪总功率分别为720、150、360 kW,拉锭速度为5 mm/min时,镍扁锭中C元素偏析程度最小,轧制成镍带卷后力学性能均衡性最好。 The large size pure nickel slab (6600 mm × 1050 mm × 210 mm) was smelted by electron beam cooling bed furnace. The effects of smelting process parameters (electron gun power and pulling speed) on the carbon (C) segregation in nickel slab The impact and mechanism. The results show that the mismatch between the electron gun power and the pulling speed leads to different degree of segregation of C elements in the nickel slab. The coordination of the electron gun power in all regions and the proper pulling speed can make the distribution of C element in the nickel slab more uniform ; When the total power of the electron gun in the cooling bed melting zone, the overflow zone and the mold zone were 720,150 and 360 kW, respectively, and the pulling speed was 5 mm / min, the segregation degree of C element in nickel slab was the smallest, Nickel tape after the best balance of mechanical properties.