为满足我国航空发动机对高温钛合金的需求，开展了TC8-1钛合金铸锭及其大规格棒材的研制。结果表明，研制的φ820 mm TC8-1钛合金大型铸锭成分均匀、冶金质量良好。制备的φ130～φ200 mm 大规格棒材的室温及高温力学性能、热稳定性能、持久性能、蠕变性能和显微组织均符合技术标准要求，能够满足某型号发动机用材需求，填补了国内空白。同时测定了TC8-1钛合金的线膨胀系数、热导率等物理性能数据，为该合金的应用提供参考。
In order to meet the need for high temperature titanium alloy used in aero-engine, the research on TC8-1 titanium alloy ingot and its large-sized bars had been carried out.The results show that the ingredients of large ingot are uniform and the ingot has good metallurgic quality.The properties of large-sized bars, such as room and high tem-perature mechanical properties, thermal stability, stress rupture properties, creep properties and microstructure can meet the requirements of technical standards and material need for engine.This investigation fills up the blank in China.Meanwhile, in order to provide a reference for the application of this alloy, the data of physical performance of TC8-1 titanium alloy, such as the coefficient of linear expansion, thermal conductivity and so on are also provided.
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