Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第20卷    第z1期    总第1期    2010年10月

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文章编号:1004-0609(2010)S1-s0419-06
电子束冷床熔炼工艺参数对TC4钛合金
Al元素挥发的影响
毛小南,罗  雷,于兰兰,雷文光

(西北有色金属研究院 钛合金研究所,西安 710016)

摘 要: 研究不同熔炼工艺参数对电子束冷床熔炼TC4钛合金过程中Al元素挥发的影响规律。结果表明:原料为真空自耗电弧(VAR)一次锭时,二次铸锭经电子束冷床熔炼获得;在轴向上,从铸锭的顶部至底部,Al元素的含量呈下降的趋势,并且随着熔炼速度的降低,其下降趋势更为明显;在径向上,铸锭的元素分布均匀。熔速为100 kg/h时,铸锭成分控制效果最佳,最接近TC4合金的名义成分。初始原料为电极块(添加单质Al)时,Al元素在原料熔化阶段发生较严重的挥发,且挥发量随着原料中单质Al含量的增加而增加。研究凝壳发现,从原料熔化侧至钛液流出侧,凝壳中Al元素的含量逐渐减少。

 

关键字: 电子束冷床;TC4钛合金;熔炼工艺参数;Al元素挥发

Effects of melting process parameters of electron beam cold hearth on
Al element evaporation in TC4 titanium alloy
MAO Xiao-nan, LUO Lei, YU Lan-lan, LEI Wen-guang

Titanium Alloy Research Center, Northwest Institute for Nonferrous Metal Research, Xi’an 710016, China

Abstract:The effects of different melting process parameters of electron beam cold hearth on the Al element evaporation in TC4 alloy was studied. The results show that when the raw material is the VAR ingot, the secondary ingot is got by EBCHM. In the axial direction of the ingot from the top to the bottom, the Al content presents a decrease trend, and as the melting rate decreases, the decrease trend is more evident. In the radial direction of the ingot, the alloy element distribution is very uniform. When the melting speed is 100 kg/h, the ingot composition control is the best, and the composition is the closest to the name components of TC4 alloy. When the raw material is the simple substance Al, the element evaporation loss increases in the melting stage, and it increases with the Al content increasing. Research of the skull founds that, from the raw materials melting side to the titanium liquid outflow side, the Al content decreases.

 

Key words: electron beam cold hearth; TC4 titanium alloy; melting process parameters; Al element evaporation

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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