Compared with low-pressure casting, gravity casting has the following advantages: production equipment and mold investment costs are lower; products with more complex product structures are easier to use gravity casting than low-pressure casting in terms of process control. Due to product order issues, considering production costs, Some products with small orders need to be produced by gravity casting. Today I will introduce aluminum alloyhubGravity casting process.
to meltAluminum alloy wheelsThe specific steps for raw materials are: put the aluminum alloy melt into the melting chamber of the furnace for melting to form aluminum alloy liquid, and when the temperature of the aluminum liquid reaches 730°C-750°C, stir it with a slag spoon for 2-3 minutes.
The specific steps for refining and degassing the molten aluminum alloy raw materials are: blowing the refining agent into the melting chamber with nitrogen for refining, removing the gas and non-metallic inclusions in the aluminum alloy melt, adding aluminum-strontium master alloy, Mix rare earth and aluminum-zirconium master alloy in the tempering chamber to carry out compound modification and refinement treatment on the aluminum alloy melt entering the tempering chamber, and blow nitrogen into the tempering chamber to treat the aluminum alloy, and de-melt the melt twice. gas treatment.
Pour the molten liquid in the use chamber into the mold through an iron spoon and cast it. For products with thinner spokes and not easy to increase cooling air, the wall thickness of the side mold corresponding to the thickness of the hot section increases, which increases the heat absorption of the mold, so that the The location can accelerate solidification, and under the same conditions, the feed channel can play a greater role.