(1) Type of alloy used
Aluminum alloy, nodular cast iron, gray cast iron, special cast iron, low carbon steel, ordinary carbon steel, special cast steel and stainless steel are the main alloys used in lost foam casting production in China. From the production practice, gray iron castings with high melting point are poured with lost foam casting technology, which not only rarely has sand sticking, but also has no burr and flash on the surface, which makes the surface quality of lost foam castings better than that of sand castings.
(2) Typical castings with successful application
In lost foam casting technology, the size of castings is controlled by the size of sandbox. Sandboxes with different sizes can be placed on the same shaking table. Therefore, in theory, lost foam casting technology can be used to pour castings with different sizes. However, in the process of vibrating compacted dry sand, the foam shape will be deformed. This is due to the low strength of the foam pattern, which leads to the casting of the larger profile casting. Therefore, lost foam casting is more suitable for castings with wall thickness greater than 4mm and weight less than 2T.
The types of castings successfully cast by lost foam casting technology include: support series, such as elevator and syringe support; Shell parts, such as gearbox shell; pipe fitting; Exhaust and intake pipes;; Rear axle casting; Aluminum alloy motor cover; Engine crankshaft and other crankshaft parts.