ã€China Aluminum Industry Network】 1. Heat Treatment of Aluminum Alloys The heat treatment of aluminum alloy castings is based on the selection of a certain heat treatment specification. The heating rate is controlled to rise at a certain temperature for a certain period of time at a certain speed to cool it at a certain rate, changing its alloy structure. The main purpose is to improve the mechanical properties of the alloy, enhance the corrosion resistance, improve the processing energy, and obtain the dimensional stability.
2, aluminum alloy heat treatment characteristics As we all know, for the high carbon content of steel, immediately after quenching to obtain high hardness, and plasticity is very low. However, it is not true for aluminum alloys. After the aluminum alloy has just quenched, the strength and hardness do not increase immediately. As for the plasticity, it has not decreased but has increased. However, after the quenched alloy is left for a period of time (for example, after 4 to 6 days and nights), the strength and hardness are significantly increased, while the plasticity is significantly reduced. The phenomenon that the strength and hardness of the aluminum alloy after quenching increases significantly over time is called aging. Aging can occur at room temperature, called natural aging, and can also occur within a certain temperature range above room temperature (such as 100 ~ 200 °C), said artificial aging.
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