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COST-AFFORDABLE TiAl ALLOYS CASTINGS FOR AUTOMOTIVE PARTS

机译：用于汽车零件的经济型Tial合金铸件

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The aim of this study is to optimize the economic net-shape forming of TiAl alloys for thernautomotive parts. Alpha-case reaction between investment mold and TiAl alloys were evaluatedrnwith mold preheating temperatures. In the case of TiAl alloys and Al2O3 mold system, there werernno a-case formation reactions. There were neither interstitial nor substitutional a-case formationsrnsince TiAl alloys have both negligible solubility of oxygen and low activity in molten states. Thernfluidity of TiAl alloys is increased with mold preheating temperature since they have a peritecticrnreaction that appears in the form of envelopment, surrounding each particles of the primaryrnconstituent. The thermo-physical variables estimated by casting process were applied to thernmodeling of TiAl alloy automotive parts casting using the Magmasoft ? . The results of therninvestment casting and modeling of TiAl alloys confirm that the casting route can be an effectivernapproach for the economic net-shape forming of TiAl alloys.
机译：这项研究的目的是优化用于汽车零件的TiAl合金的经济净成形。利用模具预热温度对熔模与TiAl合金之间的α-壳反应进行了评估。在TiAl合金和Al2O3模具系统的情况下，没有α-壳形成反应。由于TiAl合金的氧溶解度可忽略不计且在熔融状态下的活度较低，因此既没有间隙生成也没有替代性的a态形成。 TiAl合金的流动性随模具预热温度的增加而增加，因为它们的包晶反应以包封的形式出现，并包围着主要成分的每个颗粒。将通过铸造工艺估算的热物理变量应用于使用Magmasoft®TiAl合金汽车零件铸造的建模。 。 TiAl合金的精铸铸造和建模结果证实，铸造路线可以作为TiAl合金经济净成形的有效方法。

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