Research on investment casting of TiAl alloy agitator treated by HIP and HT

因为它的低密度，高提高的温度力量，和反氧化能力，用 TiAl，代替 superalloy 的合金是在飞机引擎工业的一个热话题。在这研究， Ti-47.5AL-2Cr-2Nb-0.2B 合金被用作测试材料。由使用做的陶器的壳模子和核心的一个联合过程，融化的真空弧并且离心的流，和热均衡说的紧迫(臀部) 并且热处理(HT ) 等等，为飞机引擎扔的 TiAl 旋涡煽动者成功地被做。，在与投资扔做 TiAl 旋涡煽动者的介绍关键技术处理的这篇论文包括机械性质和 machinability 的一些试验性的结果，和能影响 TiAl 铸造物的应用的解释一些担心。

Using TiAl alloy to substitute superalloy is a hot topic in aeroengine industry because of its low density, high elevated temperature strength, and anti-oxidization ability. In this research, Ti-47.5AL-2Cr-2Nb-0.2B alloy was used as the test material. By applying a combination process of ceramic shell mold and core making, vacuum arc melting and centrifugal pouring, and heat isostatic pressing （HIP） and heat treatment （HT） etc., the TiAl vortex agitator casting for aeroengine was successfully made. This paper introduced key techniques in making the TiAl vortex agitator with investment casting process, provided some experimental results including mechanical properties and machinability, and explained some concerns that could affect applications of TiAl castings.