(1. 青海聚能鈦業(yè)股份有限公司 技術(shù)研發(fā)部，西寧 810007；
2. 青海省鈦及鈦合金工程技術(shù)研究中心，西寧 810007)
摘 要: 在工業(yè)化條件下，利用電子束冷床熔煉爐(EB爐)一次熔煉制備TA15鈦合金鑄錠，對熔煉工藝參數(shù)與鑄錠化學(xué)成分均勻性之間的關(guān)系進行分析，采用赫茲-克努森-朗繆爾定律對熔煉過程中Al、Zr元素的揮發(fā)規(guī)律做簡要的數(shù)值分析，并與實際揮發(fā)規(guī)律進行比較分析。結(jié)果表明：在EB爐熔煉過程中，Al、Zr元素的揮發(fā)規(guī)律符合朗繆爾定律；其中，Al元素揮發(fā)嚴重，理論揮發(fā)率為18.69%，實際揮發(fā)率為15.33%；Zr元素揮發(fā)率相對較低，理論揮發(fā)率為2.80%，實際揮發(fā)率達到3.33%；Ti基體的理論揮發(fā)率為2.86%。EB爐熔煉功率、真空度及各工藝參數(shù)之間的匹配性是影響Al、Zr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(xué)成分均勻性良好。
關(guān)鍵字: TA15鈦合金；電子束冷床熔煉；Al元素揮發(fā)；成分均勻性
（1. Technology R&D Department, Qinghai Supower Titanium Co., Ltd., Xi′ning 810007, China;
2. Titanium and Titanium Alloys Engineering Research Center of Qinghai Province, Xi′ning 810007, China）
Abstract:Under industrialization conditions, the TA15 titanium alloy ingot was prepared by one-time smelting using an electron beam cold-bed melting furnace (EB furnace). The relationship between the smelting process parameters and the homogeneity of the chemical composition of alloy ingot was analyzed. A brief numerical analysis of the volatilization law of Al and Zr element was studied by Hertz-Knudsen-Langmuir''''s law, and it was compared with the actual volatility law. The results show that the volatilization law of Al and Zr elements during EB melting process complies with Langmuir’s law. Among them, the Al element volatilization is serious, the theoretical volatilization rate is 18.69%, and the actual volatilization rate is 15.33%. The Zr element volatilization rate is relatively lower, the theoretical volatilization rate is 2.80%, the actual volatilization rate is 3.33%; the theoretical volatilization rate of the Ti matrix is 2.86%. The EB furnace melting power, vacuum degree and the matching between various process parameters are the key factors which affecting the volatilization of Al and Zr elements. The chemical composition of alloy ingot prepared by reasonable process parameters has good uniformity.
Key words: TA15 titanium alloy; electron beam cold hearth melting; Al element evaporation; composition uniformity
