1. Aluminum bronze has casting properties such as strong air absorption, easy oxidation and slag generation, large solidification shrinkage, poor thermal conductivity and other casting properties, and poor casting performance;
2. Before casting, use certain alkaline earth metal compounds, such as a mixture of Na3AlF6 and NaF, as a slag cleaning agent to purify the copper liquid, which is effective in improving the pure liquid metal and the crystal structure of the ingot;
3. The pouring temperature of aluminum bronze is generally 1120~1180℃, and the pouring temperature of large-size ingots is generally slightly lower. The casting speed of aluminum bronze is relatively low. For example, a factory produces Ф200mm ingots with a casting speed of 4.0~4.5m/h; produces Ф400mm ingots with a casting speed of 2.4~2.6m/h;
4. When casting aluminum bronze round ingots, the metal liquid level in the mold can be cast in open flow without any protection;
5. The melt needs to enter the crystallizer through the hole at the bottom of the funnel. The design of the funnel aperture must meet two conditions at the same time: one must ensure the flow rate that matches the casting speed; the second must ensure that a certain height of liquid level is always maintained in the funnel, so that the scum on the liquid surface cannot flow into the mold from the funnel hole;
6. Aluminum bronze ingots are prone to pores and concentrated shrinkage holes. At the end of pouring, they must be carefully repaired to avoid concentrated shrinkage holes in the ingot.
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