Experimental Research on the Absorption of Fluorine in Gamma‐TiAl during Electroslag Remelting

Experimental Research on the Absorption of Fluorine in Gamma‐TiAl during Electroslag Remelting
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电渣重熔过程中GammaâTiAl吸氟实验研究

DOI:
10.1007/978-3-319-48102-9_9
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发表时间:
2013
期刊:
影响因子:
--
通讯作者:
Bernd Friedrich
Bernd Friedrich
中科院分区:
--
文献类型:
--
作者:
Peter Spiess;Bernd Friedrich

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文献报道,所谓的“卤素效应”显著提高了γ - tial的抗氧化性。这种效应是基于气态卤化铝的形成,这些卤化铝在表面氧化成al2o3,形成保护性氧化铝层。为了研究γ - tial在电渣重熔过程中对氟的吸收情况,并提高经体氟化法制备的合金的抗氧化性,在IME进行了一系列试验。在400 kW的实验室炉中,用活性ca - caf2渣重熔了多个Ti-45Al电极。熔速、渣中钙含量等参数系统变化。采用GDOS和EPMA对铸锭进行了剖分和表征,研究了熔炼参数对氟化效率的影响,以及对凝固组织的影响,特别是氟的分布。
In literature, it has been reported that the so called “halogen effect” significantly improves the oxidation resistance of gamma-TiAl. This effect is based on the formation of gaseous Al-halides which are oxidized to Al2O3on the surface resulting in a protective alumina layer. To investigate the absorption of fluorine in gamma-TiAl during electroslag remelting and to enhance the oxidation resistance of the produced alloy by bulk-fluoridation, a series of tests was performed at IME. In a 400 kW lab scale furnace multiple electrodes of Ti-45Al were remelted using an active Ca-CaF2slag. Parameters like melt rate and Ca content in the slag were systematically varied. The ingots were sectioned and characterized by GDOS and EPMA to demonstrate the influence of the melting parameters on the efficiency of fluoridation as well as their impact on solidification structure with special regard to the distribution of fluorine.
合金钢及合金的电渣重熔
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