100kW卧式中频机的φ740水冷套铸件,其圆内表面上可看到光亮圆滑的气泡及缩孔状气孔,其产生位置是靠近在水套芯和砂芯组成的铸型凹角处,在内表面并具有氧化色,它们既不象气孔内壁是平的,又不象缩孔的内壁呈枝状结晶的末稍状,故称此缺陷为缩孔状气孔。其特征在断面边缘轮滑廓由许多略呈圆形的弧线构成及可见的圆滑气泡轮 100kW horizontal MF machine φ740 water-cooled sleeve castings, the round surface can be seen bright and smooth bubbles and shrinkage-like pores, the production position is close to the core in the water core and sand core mold corner at, within The surface and has an oxidation color, they are not as flat as the inner wall of the stomatal pores, but not like the inner wall of the shrinkage of the crystal shape of the terminal slightly shaped, so that the defect is shrinkage-like pores. Characterized by the edge of the section of the slip profile by a number of slightly circular arc and visible smooth bubble wheel