铸坯星状裂纹（Star-shaped cracks in castings）是指在铸件表面出现的形状类似星星的裂纹。
这种裂纹的来源通常是由于铸件内部存在应力集中，导致表面受到拉应力而产生裂纹。这种应力集中可能是由于铸件内部结构不均匀、内部气孔或气泡、内部残留应力或者外部温度变化引起的。
下面是一些关于铸坯星状裂纹的英文例句及其中文翻译：
The casting was rejected due to the presence of star-shaped cracks on the surface. （由于表面出现了星状裂纹，铸件被拒收了。）
The foundry identified the cause of the star-shaped cracks as improper gating and runners design. （铸造厂认定星状裂纹的原因是门槽和浇口设计不当。）
The casting was reworked to remove the star-shaped cracks before it was shipped to the customer. （在运送到客户之前，铸件经过了修复以消除星状裂纹。）
这种裂纹的来源通常是由于铸件内部存在应力集中，导致表面受到拉应力而产生裂纹。这种应力集中可能是由于铸件内部结构不均匀、内部气孔或气泡、内部残留应力或者外部温度变化引起的。
下面是一些关于铸坯星状裂纹的英文例句及其中文翻译：
The casting was rejected due to the presence of star-shaped cracks on the surface. （由于表面出现了星状裂纹，铸件被拒收了。）
The foundry identified the cause of the star-shaped cracks as improper gating and runners design. （铸造厂认定星状裂纹的原因是门槽和浇口设计不当。）
The casting was reworked to remove the star-shaped cracks before it was shipped to the customer. （在运送到客户之前，铸件经过了修复以消除星状裂纹。）