gas porosity

During the HPDC process, the filling behavior of liquid metal is very complex, which would cause flow marks, gas porosity, and lack of filling defects. Correspondingly the mold would get thermal fatigue cracks and erosion.

在压铸件成型过程中，金属液流动行为复杂，容易产生流痕、气孔、浇不足等缺陷，同时易于造成模具的热疲劳裂纹、冲蚀等，使模具的使用寿命缩短。

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The gas porosity of section plane was characterized with scanning electron microscopy ( SEM).

用扫描电镜（SEM）表征了材料剖面气孔的形态结构。

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