How to quickly cool lost wax castings?

When making the grinding ball, by increasing the chromium content, on the one hand, the number of carbides can be increased, and on the other hand, chromium-containing carbides can be produced, thereby significantly improving the strength of the grinding ball; at the same time, increasing the copper content in the composition strengthens the conventional fine grains and optimizes the crystals, thereby significantly improving the impact value. In addition, adding elements such as Ca, which have a solubility close to zero in carbides, to the mold modifier, bioaccumulates at the forefront of the carbides, inhibiting the growth of carbides, and adding Re elements to the surface of the carbides also inhibits the growth of carbides. In addition, adding M0 and V as carbide crystal cores optimizes the crystals. Comprehensive measures make the grinding balls made of lost foam aluminum die castings not tempered HRC.

1. The use of chilled molding materials can accelerate the cooling rate of lost foam castings

Since the recycling rate of old sand for vacuum pump lost foam aluminum die castings is about 98%, although the one-time investment of using special sand is increased, the economic benefits of improving casting quality cannot be ignored. The cooling rate of using chilled sand and quartz sand can be increased by 1-4 times, significantly exceeding traditional sand casting. The cooling effect is from high purity graphite sand to steel ball to chromite sand and zircon sand.

2. By adjusting the casting composition and improving the quality treatment, the adverse effects caused by slow cooling and condensation can be offset.