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30卷    第11期    总第260期    2020年11月

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文章编号:1004-0609(2020)-11-2706-08
电子束冷床炉熔炼TA15钛合金的工艺技术
杜 彬1, 2,张志斌1,雷云清1,钱光凝1, 2,孙宁宁1,王 倩1

(1. 青海聚能钛业股份有限公司 技术研发部,西宁 810007;
2. 青海省钛及钛合金工程技术研究中心,西宁 810007
)

摘 要: 在工业化条件下,利用电子束冷床熔炼炉(EB炉)一次熔炼制备TA15钛合金铸锭,对熔炼工艺参数与铸锭化学成分均匀性之间的关系进行分析,采用赫兹-克努森-朗缪尔定律对熔炼过程中Al、Zr元素的挥发规律做简要的数值分析,并与实际挥发规律进行比较分析。结果表明:在EB炉熔炼过程中,Al、Zr元素的挥发规律符合朗缪尔定律;其中,Al元素挥发严重,理论挥发率为18.69%,实际挥发率为15.33%;Zr元素挥发率相对较低,理论挥发率为2.80%,实际挥发率达到3.33%;Ti基体的理论挥发率为2.86%。EB炉熔炼功率、真空度及各工艺参数之间的匹配性是影响Al、Zr元素挥发的关键因素;通过合理的工艺参数制备的铸锭整体化学成分均匀性良好。

 

关键字: TA15钛合金;电子束冷床熔炼;Al元素挥发;成分均匀性

Melting technology of electron beam cold hearth melting of TA15 titanium alloy
DU Bin1, 2, ZHANG Zhi-bin1, LEI Yun-qing1, QIAN Guang-ning1, 2, SUN Ning-ning1, WANG Qian1

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

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

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

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