气孔是铸铁件中常见的缺陷,它可分成“析出气孔”和“侵入气孔”,大多出现在铸型上箱表面、拐角处或凸出的台肩等部位,有列在垂直面上也可见。薄壁处比厚壁处严重,远离内浇口端比近浇口端严重,同包铁水后浇铸件比先浇铸件严重,球墨铸铁件比灰铸铁件容易产生气孔。一般为多个成 Stomatal is a common defect in cast iron, which can be divided into “stomatal hole” and “invasion stomatal hole”, mostly appear in the surface of the mold box, corner or protruding shoulder and other parts, columns are also seen in the vertical plane . Severe than the thick wall at the thin wall at the end away from the gate closer than the end near the gate with hot metal castings than the first casting serious ductile iron castings than gray parts prone to stomatal. Generally more than into