Porosity Defects of Cast Iron Surface Plate

In the cast iron platform rough processing, we generally found no defects, some small black spots are found in the t-slot on the plane until the fine grinding, with a magnifying glass observation, small black spots were irregular crack, the length is 1mm, a few points to dozens of points, the distribution is not regular.

Cast iron platform castings occur defects, initially suspected that the first flow of molten iron did not discharge caused. For the resin from the hard sand process, the treatment of the first flow of molten iron is indeed very important. Road flow of molten iron is pouring into the molten iron, coerced along the dust, gas, pollution, oxidation, if it is not overflow, easily form hole defects in the cast iron surface plate.