Solution to discoloration and spots of die-casting aluminum alloy

Release time:

2024-02-29

Features:

Different colors and spots appear on the surface of the casting.

Cause:

① inappropriate release agent; ② release agent dosage is too much, local accumulation; ③ containing graphite in the lubricant into the casting surface; ④ mold temperature is too low, the metal liquid temperature is too low caused by irregular solidification.

Processing method:

① Replace high-quality mold release agent; ② Strict spraying amount and spraying operation; ③ Control mold temperature and maintain heat balance; ④ Control metal liquid temperature.

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