Die-casting aluminum alloy cold isolation solution


Features:

The surface of the die casting has obvious, irregular, sunken linear lines (penetrating and non-penetrating). The shape is small and narrow, and some of the transition edges are smooth, which may develop under the action of external force.

Cause:

① The two metal flows are butted with each other, but they are not completely fused and there is no inclusion between them, and the bonding force of the two metals is very weak; ② The pouring temperature or die-casting mold temperature is low; ③ Improper alloy selection, poor fluidity; ④ The runner is not positioned correctly or the flow path is long; ⑤ The filling speed is low, and the injection ratio is low.

Processing method:

① Increase the pouring temperature and mold temperature appropriately; ② Increase the injection pressure to shorten the filling time; ③ Increase the injection speed and increase the cross-sectional area of the inner gate at the same time; ④ Improve the exhaust and filling conditions; ⑤ Correct selection of alloys to improve alloy fluidity.

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