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在铸件生产过程中,我们发现许多铸件缺陷与铸铁的熔炼和浇注有直接关系,现仅从铸铁熔练浇注的角度,就几种常见缺陷(“三孔”:气孔、缩孔、渣孔;“两松”:缩松、疏松;“两裂”:热裂、冷裂)的特征、成因及防止措施谈谈粗浅的认识。一、“三孔”缺陷在所有铸件缺陷中,气孔、缩孔、渣孔是最常见的,危害也最大。 1.气孔(又称气眼、气泡等) 特征:产生在铸件的内部或表面,多呈圆形、梨形,也有呈长形及不规则形状的。多数内壁光滑,内表面多呈白色或氧化色。有时气孔中伴有渣子,称渣气孔;有
In the production of castings, we found that many defects in castings are directly related to the melting and pouring of cast iron. Several common defects (“three holes” “Two loose”: loose, loose; “split”: hot cracking, cold cracking) characteristics, causes and preventative measures to talk about superficial understanding. First, the “three holes” defects In all castings defects, pores, shrinkage, slag hole is the most common, the most dangerous. 1. Stomata (also known as the eye, bubble, etc.) Features: Occurred in the casting’s internal or surface, mostly round, pear-shaped, also showed a long and irregular shape. Most interior walls are smooth, the inner surface mostly white or oxidized color. Stomata sometimes accompanied by slag, said slag hole;