Principles and characteristics of aluminum alloy heat treatment

The heat treatment of aluminum alloy castings is to select a heat treatment specification, and the heating rate is controlled to rise to a certain temperature for a certain period of time to cool at a certain speed, and the microstructure of the alloy is changed. The main purpose is to improve the mechanical properties of the alloy and enhance corrosion resistance. Performance, improved processing ability, and dimensional stability.

2, aluminum alloy heat treatment characteristics

It is well known that for steels with a high carbon content, high hardness is obtained immediately after quenching, and plasticity is low. However, the aluminum alloy is not. After the quenching of the aluminum alloy, the strength and hardness do not immediately increase. As for the plasticity, the plasticity has not decreased, but has increased. However, after the quenched alloy is placed for a period of time (for example, after 4 to 6 days and nights), the strength and hardness are remarkably improved, and the plasticity is remarkably lowered. After the quenching, the strength and hardness of the aluminum alloy increase remarkably with time, which is called aging. The aging can occur at room temperature, called natural aging, or it can occur in a certain temperature range above room temperature (such as 100 ~ 200 ° C), called artificial aging.

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Label: Principles and Features Aluminum Alloy Heat Treatment HC Hardening

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