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首页> 外文会议>Pacific Rim International Congress on Advanced Materials and Processing >PREDICTION OF MICROPOROSITY IN COMPLEX THIN-WALL CASTINGS WITH THE DIMENSIONLESS NIYAMA CRITERION
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PREDICTION OF MICROPOROSITY IN COMPLEX THIN-WALL CASTINGS WITH THE DIMENSIONLESS NIYAMA CRITERION

机译：用无量纲尼山标准预测复杂薄壁铸件中的微孔率

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摘要

Microporosity prediction is very important for the production of complex-shaped superalloy investment castings in the aviation industry. In this study, the dimensionless Niyama criterion developed by Kent D.Carlson was used for microporosity prediction in nickel-based superalloy investment casting. The solid fraction-temperature curve and the total solidification shrinkage of the alloy were calculated using JMatPro software. Relationship between the volume percentage of microporosity and the dimensionless Niyama values were constructed. At the same time, Quantitative Metallographic measurements of the microporosity of the practical thin-wall casting were carried out. The results showed that the prediction agreed well with the experiment in general, except for some thick-wall sites in the casting.
机译：微孔径预测对于航空工业中复杂的超合金投资铸件的生产非常重要。在这项研究中，肯特D.Carlson开发的无量纲Niyama标准用于基于镍的超合金投资铸造的微孔预测。使用JMATPRO软件计算固体级分温度曲线和合金的总凝固收缩。构建了微孔率和无量纲脊柱值之间的体积百分比与无量纲百分比之间的关系。同时，进行实际薄壁铸件的微孔的定量金相测量。结果表明，除了铸造中的一些厚壁部位外，预测与实验相一致。

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