摘要
采用BMO-25型电子束冷床炉(EB炉)熔炼TC18钛合金铸锭,利用Langmuir定律建立了熔炼过程中各组元饱和蒸气压及挥发规律的数学模型,并根据实测挥发率对TC18钛合金各组元的活度系数进行验证性分析。结果表明:通过数学模型获得的活度系数及挥发率能够较好地匹配实际熔炼过程,理论挥发率与实测挥发率吻合度较高。EB炉熔炼TC18钛合金过程中,Al、Cr元素挥发明显,实测挥发率分别为12.06%~18.27%和30.77%~37.16%。将Al、Mo、Cr补加率分别设为15.6%、4.25%、30%,并通过控制熔炼电流使熔炼速度稳定在178 kg/h左右,由此所获得的TC18钛合金铸锭化学成分均匀性良好,符合GB/T 3620.1—2016要求。
The TC18 titanium alloy ingots were prepared by BMO-25 electron beam cold hearth melting(EB).The mathematical model of vapor pressure and volatilization rule of each component during smelting process was established by Langmuir’s law.And the activity coefficients of each component of TC18 titanium alloy were verified according to the measured volatilization rate.The results show that the activity coefficients and volatilization rate obtained by mathematical model can better match the actual smelting process,and the theoretical volatilization rate is in good agreement with the measured volatilization rate.The elements of Al and Cr volatilize obviously during the process of TC18 titanium alloy EB furnace smelting,the measured volatilization rates are 12.06%~18.27%and 30.77%~37.16%,respectively.The addition rates of Al,Mo and Cr are set to 15.6%,4.25%and 30%,respectively,and the smelting speed is about 178 kg/h by controlling the smelting current.The chemical composition uniformity of the obtained TC18 titanium alloy ingot is good,which can meet the requirement of GB/T 3620.1—2016.
作者
杜彬
曹寿林
王龙
马小艳
王倩
张炜华
Du Bin;Cao Shoulin;Wang Long;Ma Xiaoyan;Wang Qian;Zhang Weihua(Qinghai Supower Titanium Co.,Ltd.,Xining 810007,China;Titanium and Titanium Alloys Engineering Research Center of Qinghai Province,Xining 810007,China)
出处
《钛工业进展》
CAS
2022年第2期1-6,共6页
Titanium Industry Progress
基金
国家工业强基工程项目(TC150B5C0)
青海省重点研发与转化计划项目(2020-GX-105)。
关键词
TC18钛合金
电子束冷床炉熔炼
挥发率
成分均匀性
TC18 titanium alloy
electron beam cold hearth melting
volatilization rate
composition uniformity
