摘要
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-sized flat nickel ingot （6600 mm×1050 mm×210 mm） were melted by electron beam cold hearth furnace. The effects and mechanism of melting parameters including electron gun powers and pulling rate on C segregation in flat nickel ingot were investigated. The results show that the mismatch between the electron gun powers and pulling rate can lead to different degree of C segregation. Adjusting the electron gun powers of each region and selecting proper pulling rate can make the distribution of C element more uniform in the fiat nickel ingot. When the total power of electron gun in the regions of cold hearth, overflow and crystallizer are 720, 150, 360 kW respectively, and the pulling rate is 5 mm/min, C segregation of the fiat nickel ingot is minimum and the mechanical properties of rolled coils are the best.
出处
《热加工工艺》
CSCD
北大核心
2017年第5期86-89,共4页
Hot Working Technology
基金
云南省应用基础研究重大项目(2003FC001)
国家国际科技合作专项项目(2014DFR70810)
关键词
电子束冷床炉
大规格镍扁锭
电子枪功率
拉锭速度
C元素偏析
electron beam cold hearth furnace
large-sized nickel ingot
electron gun power
pulling rate
C segregation
