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Aluminum alloy die-casting products are mainly used in electronics, automobiles, motors, home appliances and some communication industries. Some high-quality aluminum alloy products with high performance, high precision and high toughness are also used in industries with high requirements such as large aircraft and ships. The main use is still in the parts of some instruments. Sand holes and other defects sometimes appear in the production process, so how to avoid sand holes in aluminum alloy die casting?
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The reason of shrinkage and shrinkage defects in Dalian aluminum die casting processing is that the liquid shrinkage and solidification shrinkage of metal are larger than the solid shrinkage. When performing sequential solidification, the liquid metal cannot be replenished in the solidified area, and holes will be formed. Large and concentrated holes are called shrinkage holes, and small and dispersed holes are called shrinkage holes. Prevention methods are:
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The reason of shrinkage and shrinkage defects in Dalian aluminum die casting processing is that the liquid shrinkage and solidification shrinkage of metal are larger than the solid shrinkage. When performing sequential solidification, the liquid metal cannot be replenished in the solidified area, and holes will be formed. Large and concentrated holes are called shrinkage holes, and small and dispersed holes are called shrinkage holes. Prevention methods are:
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Dalian aluminum die-casting products are many, and they are often seen in daily life. The cars running on the road, the street lamps and the mobile phones held by pedestrians are all aluminum die-cast products.
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Introduction of processing types of aluminum die castings in Dalian1) Dalian Aluminum die-casting pressure casting has three casting methods: low pressure (pressure no more than 20MPa), medium pressure (pressure no more than 300MPa) and high pressure (pressure more than 3000MPa).
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What surface treatment is required for aluminum alloy die casting?1. Aluminum phosphatingThe effects of accelerant, fluoride, Mn2+, Ni2+, Zn2+, PO4 and Fe2+on the phosphating process of aluminum were studied in detail by means of SEM, XRD, potential time curve and film weight change.
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