Squeeze casting, also known as liquid metal forging, is a combination of casting and forging process by which molten metal solidifies under pressure within closed dies positioned between the plates of a hydraulic press.
The molten metal is poured into the bottom half of the pre-heated die, then the applied pressure and instant contact of the molten metal with the die surface produce an instant heat transfer condition in which coring can be used with this process to form complex geometry. The porosity caused by both gas and shrinkage can be prevented or even eliminated, meanwhile the mechanical properties are also improved, approaching those of a wrought product which reduces the need for surface finish.
The squeeze casting process is easy to realize robotization and produce near-net-to-net shape high-quality components. Both ferrous and non-ferrous materials can be produced using this method.
Casting blanks of squeeze casting and die casting are extremely similar especially after machining process. How to distinguish casting blank of the two casting processes? Let’s find the six main differences between squeeze casting and die casting below now :
|Item||Squeeze Casting||Die Casting|
|Manufactured Part Application||functional parts, such as engine cylinder block, wheel hub, piston, connecting rod, brake shoes, pneumatic or hydraulic valve body,etc.||structural parts, such as vehicle door frame, instrument panel, engine housing,etc|
|Raw Material||Most of metal alloys||Only casting alloys|
|Surface Finish & Heat Treatment||Much wider surface finish applications like anodizing and heat treatment methods like solid-melt strengthening||limited surface finish like power coating. Not able to apply anodizing.|
|Metallographic Structure||Typical crushing-grain texture as forging condition||Typical dendrite-shape texture as cast condition|
|Surface Smoothness||Extremely smooth surface like machining parts||Microscopic pores on surface, so called “water streak texture”|
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