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Dongguan aoko precision die casting co. LTD

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    Introduction to die casting aluminum alloy

    Date of issue:2019-02-27 Source:http://www.aoprecision.com/news/3.html

    Die-casting anode manufacturers to tell you about the introduction of die-casting aluminum alloy:

    1. Good product quality: high casting dimensional accuracy, generally equivalent to grade 6~7, even up to grade 4; Good surface finish, generally equivalent to 5~8 level; The strength and hardness are higher, the strength is generally 25~30% higher than sand casting, but the elongation is about 70% lower. Stable size and good interchangeability; Die-castable aluminum thin - walled complex castings. For example, the minimum wall thickness of current zinc alloy die-cast aluminum can be up to 0.3mm; Aluminum alloy casting up to 0.5mm; The minimum casting aperture is 0.7mm; The minimum pitch is 0.75mm.

    2, high production efficiency, the machine productivity high, such as domestic J Ⅲ type 3 horizontal cold empty aluminum die casting machine die casting aluminum 600 ~ 700 times on average eight hours, small hot chamber die casting machine for aluminum every eight hours can die casting aluminum 3000 ~ 7000 times; Die casting aluminum long life, a set of die casting aluminum, die casting aluminum bell alloy, life can be up to hundreds of thousands of times, or even millions of times; Easy to realize mechanization and automation.

    After anodizing the surface of metal materials or products, their corrosion resistance, hardness, abrasion resistance, insulation and heat resistance are greatly improved. The most frequently anodized metal is aluminum. Anodic oxidation of aluminum is usually carried out in an acidic electrolyte with aluminum as the anode. In the electrolysis process, oxygen anions interact with aluminum to produce an oxide film. This film is not thin enough at the beginning of the formation, although there is a certain resistance, but the negative oxygen ions in the electrolyte can still reach the aluminum surface to continue to form an oxide film. As the film thickness increases, the resistance also increases, and the electrolytic current decreases. At this point, the outer oxide film in contact with the electrolyte is chemically dissolved. When the rate of oxide formation on the surface of aluminum gradually balances with the rate of chemical dissolution, the oxide film can reach the thickness under this electrolytic parameter. Aluminum anodized film layer porous, easy to adsorb dyes and colored substances, and therefore can be dyed to improve its decorative. The corrosion resistance and wear resistance of the oxide film can be further improved after it is sealed with hot water, high temperature steam or nickel salt.


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