(1. 青海聚能鈦業(yè)股份有限公司，西寧 810000；
2. 青海省鈦及鈦合金工程技術(shù)研究中心，西寧 810000)
摘 要: 采用數(shù)值模擬(Langmuir定律)研究了工業(yè)化條件下電子束冷床爐(EB爐)一次熔煉制備TC4合金鑄錠的工藝，對熔煉工藝參數(shù)與鑄錠化學成分均勻性之間的關(guān)系進行了分析，并對熔煉過程中Al元素的揮發(fā)規(guī)律做了簡要的理論計算分析。結(jié)果表明：EB爐熔煉過程中Al元素揮發(fā)嚴重，實際揮發(fā)率達16.9%，高于理論值11.8%；熔煉電流、真空度及各工藝參數(shù)之間的匹配性是影響Al元素揮發(fā)的關(guān)鍵因素；通過合理的工藝參數(shù)制備的鑄錠整體化學成分均勻性良好，徑向成分均勻性優(yōu)于軸向的，V元素分布均勻性優(yōu)于Al元素的，Al元素標準偏差在0.25%以內(nèi)，V元素標準偏差在0.10%以內(nèi)，其成分精度和均勻性完全符合國家標準要求。
關(guān)鍵字: TC4合金；電子束冷床熔煉；Al元素揮發(fā)
（1. Qinghai Supower Titanium Co., Ltd., Xining 810000, China;
2. Titanium and Titanium Alloys Engineering Research Center of Qinghai Province, Xining 810000, China）
Abstract:The technology of preparing TC4 alloy ingot by electron beam cold hearth melting furnace (EBCHM) in industrialized conditions process was studied. The relationship between the smelting process parameters and the homogeneity of the chemical composition of ingot was analyzed, and a brief theoretical calculation and analysis of the volatilization of Al element was studied. The results show that the volatilization of Al in EB melting process is serious and the actual volatilization rate is 16.9%, which is higher than the theoretical value of 11.8%. The melting current, vacuum degree and the matching of process parameters is the key factor to affect Al element volatilization. The chemical composition of ingot prepared by reasonable process parameters has good uniformity, the radial component uniformity is superior to the axial direction, the distribution of V elements is better than that of Al, the standard deviation of Al is within 0.25% and the standard deviation of V is less than 0.10%. And the composition accuracy and uniformity are in full compliance with the requirements of national standards.
Key words: TC4 titanium alloy; electron beam cold hearth melting; Al element evaporation
