Method for manufacturing compressed aluminum alloy housing sample

Abstract

The invention relates to a method for manufacturing a compressed aluminum alloy housing sample. The method comprises the following steps of 1, process designing, 2, mold manufacture, 3, mold core manufacture, 4, melting refining, 5, mold assembling and pouring, 6, shakeout cleaning, 7, X-ray flaw detection, 8, heat treatment, 9, mechanical processing and 10, a bursting test. AlSi7Mg0.3, and an aluminum-strontium alloy or / and an aluminum-titanium alloy as refiners are adopted in the melting refining (4). A body performance test (11), oxidizing slag content analysis (12), body microstructure compactness analysis (13), body microstructure pinhole degree analysis (14), a revision process design (15) and an alloy composition determination and refining process (16) are carried out after the bursting test (10). Through the above processes, the compressed aluminum alloy housing sample is obtained. The method has a reasonable process flow and realizes a larger pressure-bearing capacity of a compressed aluminum alloy housing product.

Description

Technical field [0001] The invention relates to a method for pouring and manufacturing a pressurized aluminum alloy shell of aluminum alloy sand mold gravity casting, in particular to a method for manufacturing a pressurized aluminum alloy shell sample. The products of the present invention are mainly used in high-voltage and ultra-high-voltage transmission and distribution power systems, and belong to the fields of new energy, electronic and electrical equipment safety and the like. Background technique [0002] At present, most of the aluminum alloy shell products used in high-voltage and ultra-high-voltage transmission and distribution power systems in China are castings. The traditional method of aluminum alloy shell casting is to complete the sand mold low-pressure casting process. This casting process is due to low-pressure casting. For a long time, there are defects such as low production efficiency and coarse grains of the casting body. Although the products produced by ...

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Problems solved by technology

[0002] At present, the blanks of aluminum alloy shell products used in high-voltage and ultra-high-voltage transmission and distribution power systems in China are mostly castings. The traditional method of casting aluminum alloy shells is to use sand mold low-pressure casting technology. For a long time, there are defects such as low production efficiency and coarse grains of the casting body. Although the minimum pressure of the products produced by the sand low-pressure casting process can reach 0.4-0.5 MPa in the blasting test, it has reached the qualified standard. Because the aluminum alloy shell The strength of the pressure-bearing capacity of the body product is related to the safety of the entire grid operation of the high-voltage and ultra-high-voltage transmission and distribution power system. The pressure capacity of alloy shell products is very difficult to use the sand mold low pressure casting process

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