How important is temperature when you are Die Casting
Author: SAIVS Date Published: Sep 04,2023
Temperature control is a critical factor in Die Casting.
The mechanical properties of the alloy, such as tensile and
yield strengths, are negatively affected by increased temperatures.
On the other hand, ductility generally increases with higher temperatures,
although this can vary depending on the specific alloy being cast.
Achieving the appropriate temperature is vital for both the die and the molten metal.
The molten metal must be heated properly to ensure smooth flow and complete filling of the mold.
If the metal is too hot for the mold, it can cause damage to the mold itself.
Conversely, if the mold is too cold, the rapid cooling of
the molten metal during casting can result in defects in the final product.
What is the proper die temperature?
The die temperature will depend on what alloy you intend to cast.
You want to avoid putting excess strain on your die,
stressing the die will lower the life expectancy of the die itself.
It is best to pour your alloy into your die when it is approximately 50°
to 70° degrees higher than the crystallization temperature of the alloy.
The die needs to be maintained at approximately a third of the alloy’s temperature.
What is the proper die casting chamber/machine temperature?
The temperature required for the die casting machine is a complex calculation
that includes things such as the alloy type, die type, size of the part to cast, and more.
The chamber temperature needs to be determined by an experienced die caster.
What is the proper alloy temperature?
The proper alloy temperature in die casting can vary depending on the specific alloy being used.
Different alloys have different melting points, solidus/liquidus ranges,
and optimal processing temperatures. Here are a few examples of commonly
used die casting alloys and their approximate recommended temperature ranges:
have a melting range between 600°C (1112°F) and 700°C (1292°F).
The specific temperature within this range depends on
the alloy composition and desired flow characteristics.
Zinc Alloys: Zinc-based alloys commonly used in die casting
have lower melting points compared to aluminum.
The typical temperature range for zinc alloys is around 380°C (716°F) to 420°C (788°F).
Magnesium Alloys: Magnesium alloys used in die casting typically have
a higher melting point compared to aluminum but lower than zinc.
The recommended temperature range for magnesium
alloys is approximately 650°C (1202°F) to 700°C (1292°F).
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