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1. Control of alloy composition Starting from the purchase of alloy ingots, the alloy ingots must be based on ultra-high purity zinc, together with alloy ingots made of ultra-high purity aluminum, magnesium and copper. The supplier has strict composition standards. High-quality zinc alloy material guarantees the production of high-quality castings.
2. To ensure that there is a clean, dry stacking area for the purchased alloy ingots, in order to avoid prolonged exposure to moisture and white rust, or to be contaminated by factory contaminants to increase slag production and increase metal loss. The clean factory environment is very effective in controlling the composition of the alloy.
3. The ratio of recycled materials such as new materials and outlets should not exceed 50% of the returned material. Generally new material: old material = 70:30. Aluminum and magnesium gradually decrease in continuous remelting alloys.
4. When the outlet material is remelted, the remelting temperature must be strictly controlled not to exceed 420°C to avoid the loss of aluminum and magnesium.
5. The conditional die-casting plant preferably adopts a centralized melting furnace to melt the zinc alloy, so that the alloy ingot can be evenly proportioned with the returned charge, and the flux can be used more effectively, so that the alloy composition and temperature can be maintained evenly and stably. Plating waste, fines should be furnace alone.
Problems to be Noted in the Production of Zinc Alloy
In the process of producing zinc alloys, attention should be paid to the following five aspects: