铸造工艺及壳型浇道尺寸对K418C高温合金性能的影响

Effects of Casting Process and Feeding Mould on Mechanical Properties of K418C Superalloy

研究了壳型及铸造工艺对K418C合金凝固过程中显微疏松和合金组织的影响。实验结果表明:浇注温度适当提高时可以得到比较细的晶粒从而提高拉伸性能,使用改进后的壳型可以使冷却速率降低进而使显微疏松形成的倾向性降低,提高试样检测合格率。

The effects of shell mould and casting process on the microstructures and micro-shrinkage of K418C alloy during solidification were studied. The results show that when the pouring temperature is properly increased, relatively fine grains can be obtained to improve the tensile properties. The use of improved shell mould can reduce the cooling rate and thus reduce the tendency of the formation of micro-shrinkage to improve detection pass rate of the samples.