How to identify the good or bad castings
Casting production, the quality of the casting to control and inspection. First of all to develop from the raw materials, auxiliary materials to each specific product control and inspection of the code and technical conditions. For each process are strictly in accordance with the code of practice and technical conditions for control and testing. Finally, the finished product for quality inspection. To be equipped with a reasonable detection method and the appropriate detection staff. Generally, the appearance quality of the castings can be used to determine the surface roughness of the castings. The fine cracks on the surface can be checked by the coloring method and the magnetic powder method. The internal quality of the castings can be checked and judged by methods such as audio, ultrasound, eddy currents, X-rays and gamma rays.
Sand casting casting defects are: cold, pouring enough, pores, sticky sand, sand, sand eyes, sand and so on.