Molten Aluminum Casting Purification Technology
Release time:
2024-02-13
Casting aluminum alloy is an aluminum alloy that is filled with molten metal to obtain various shapes of parts. It has the advantages of low density, high specific strength, good corrosion resistance and casting process, and small restrictions on part structure design. Divided into Al-Si and Al-Si-Mg-Cu-based medium-strength alloys; Al-Cu-based high-strength alloys; Al-Mg-based corrosion-resistant alloys; Al-Re-based hot-strong alloys. Most of the need for heat treatment to strengthen the alloy, eliminate the stress in the casting, stable organization and part size and so on. Used in the manufacture of beams, gas turbine blades, pump bodies, hangers, hubs, intake lips and engine casings. It is also used in the manufacture of automobile cylinder heads, gearboxes and pistons, instrument housings and supercharger pump bodies and other parts.
The aluminum alloy used to directly obtain the required parts by the casting process. It is required to have ideal casting properties: good fluidity, small shrinkage, hot and cold cracking tendency, small segregation and suction. The element content of cast aluminum alloy is generally higher than that of the corresponding deformed aluminum alloy, and most alloys are close to eutectic composition.
Cast aluminum alloy has good casting performance and can be made into parts with complex shapes; it does not require huge additional equipment; it has the advantages of saving metal, reducing costs, and reducing working hours, and is widely used in the aviation industry and civil industry. Used in the manufacture of beams, gas turbine blades, pump bodies, hangers, hubs, intake lips and engine casings. It is also used in the manufacture of automobile cylinder heads, gearboxes and pistons, instrument housings and supercharger pump bodies and other parts.
Modern casting aluminum alloy can be divided into 4 series according to the main elements, namely: aluminum silicon system, aluminum copper system, aluminum magnesium system and aluminum zinc system. For these 4 series, each country has the corresponding alloy and alloy grade mark. China adopts ZL 3-digit marking method. The first digit indicates the alloy system, of which: 1 indicates the aluminum-silicon alloy system, 2 indicates the aluminum-copper alloy system, 3 indicates the aluminum-magnesium alloy system, 4 indicates the aluminum-zinc alloy system, and the second and third digits indicate the alloy serial number. Several typical cast aluminum alloys in China are shown in the table. According to the use characteristics of the alloy, they can be divided into: heat-resistant cast aluminum alloy, airtight cast aluminum alloy, corrosion-resistant cast aluminum alloy and weldable cast aluminum alloy
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