Molten Aluminum Filter Aramit Group is mainly used for aluminum alloy filtration in foundries and foundries. It can effectively remove inclusions in molten aluminum, reduce residual impurities, improve the quality of aluminum wheel castings, avoid defects such as slag inclusion and pores, and increase ductility.
The slag mixed into the ingot or other non-metallic impurities falling into the ingot are called non-metallic inclusions. The fracture features are black strips or flakes, and the microstructure features are mostly black linear, massive, flocculent, and irregular organization, with obvious color difference from the substrate.
In the production process of cast aluminum alloy ingots, if the control is not strict, various product defects, especially aluminum-silicon alloys, will often appear.
Non-metallic inclusions are an important cause of delamination and many surface defects in aluminum processed products. During the heat treatment and heating process, the presence of non-metallic inclusions will promote the formation of secondary pores and bubbles.
In terms of mechanical properties, non-metallic inclusions are places where stress is concentrated, which reduces the strength and elongation limits of the alloy.
In particular, the reduction in transverse elongation and dynamic mechanical properties (impact toughness, fatigue strength and fracture toughness) is more serious.
In addition, non-metallic inclusions will also reduce the stress corrosion resistance of the alloy.
Non-metallic inclusions (slag inclusions) are the most common waste products in aluminum alloy ingots.
According to statistics, in terms of quality, aluminum ingots are thrown away because the incoming slag accounts for 10% to 25% of the total waste.
Slag inclusion is usually caused by molten slag, layered fragments and large oxides falling into the ingot along with the molten metal during the casting process.
Molten Aluminum Filter Aramit Group is used to filter molten aluminum and non-ferrous alloys. In addition to the use of alumina foam ceramic filters, it is also necessary to pay attention to the casting process of aluminum alloy.
1. Shorten the distance of the Launder system as much as possible, create good transport conditions, and prevent fluctuations in the metal level. It is best to use the same casting grade as much as possible.
2. Thoroughly bake the conveyor, increase the casting temperature appropriately, carefully remove the slag during the casting process, and carefully clean the furnace, flow plate and other tools after casting.