forging press manufacturers Explain the causes of cracks in castings
There are two main reasons: First, usually due to the solidification of the metal too fast, resulting in casting defects (seams); the second is due to high temperature cracking.
1, for the metal solidification too fast, the resulting casting seams, can be controlled by the casting time and solidification time to solve. Casting time related factors: the shape of the wax shape. Casting the thickness of the amount of casting pressure (casting machine) Permeability of the embedding material Correlation factors for setting time: Shape of the wax shape. Maximum firing temperature of the ring. Type of embedding material. Type of metal. Temperature of the casting.
2, due to high temperature cracking, and the metal and the mechanical properties of the embedded material related to the following conditions prone to cracking: casting temperature is high prone to cracking; high strength embedding material prone to cracking; small extension The nickel-based alloy and cobalt alloy easy to produce cracks
forging press manufacturers Tell you what to do:
Use low strength embedding material; Minimize metal casting temperature; Do not use less ductile. Brittle alloy.
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