论文部分内容阅读
孕育铸铁件在湿砂型中浇注时,也经常会发现铸件的皮下气孔缺陷。我厂生产的一种端盖加工面与断面上,气孔集中于边缘薄壁部分的中下部,中心厚壁部分较少。气孔具有明显的向内向上浮迹象,即具有拖尾的图形。上表面孔近似圆形。空孔颜色均为浅灰色带有光泽,气孔宽2—4毫米,长5—12毫米,圆孔φ2—4。我车间端盖铸件中皮下气孔缺陷极为严重。最高时废品率曾达19.9％。
Casting iron castings in the wet sand type, it is often found that the casting subcutaneous porosity defects. I plant a kind of end cap processing surface and the cross section, the pores concentrated in the middle and lower part of the edge of the thin-walled part of the central part of the thick-walled less. Stomata have obvious inward-upward floating signs, that is, with a tailing pattern. The upper surface of the hole is approximately circular. The color of the holes are light gray with a glossy, stomatal width of 2-4 mm, 5-12 mm long, round hole φ2-4. I have a very serious subcutaneous hypodermic defect in the end cap casting. The highest rejection rate of 19.9%.