Squeeze Casting, also known as Liquid Metal Forging, is sometimes referred to as low-speed high-pressure casting or liquid metal stamping. It is a cast-forging hybrid process: liquid metal is formed and undergoes slight plastic deformation under high machine pressure. This effectively reduces shrinkage defects, enhances workpiece microstructure density, and significantly improves mechanical properties via heat treatment.
Unlike traditional die casting (which uses high-speed filling), squeeze casting employs slow filling to minimize air entrapment and porosity. This facilitates subsequent T6 heat treatment—generally, die castings have more porosity and cannot withstand heat treatment.
Squeeze casting typically operates at 80–100 MPa. Prolonged high pressure refines grains and densifies the microstructure, delivering stronger mechanical properties than die casting. Overall, its mechanical performance approaches that of forging.
Squeeze casting uses both horizontal and vertical die casting machines. While their mold-clamping methods differ, both employ vertical injection to reduce air entrapment, lower gas content in castings, improve quality, and enable easier heat treatment.
Ideal for thick-walled castings (3–400 mm); unsuitable for thin sections.
It aligns with the automotive lightweighting trend of “aluminum-for-steel” and “casting-for-forging”, combining casting’s high efficiency/low cost with forging’s superior mechanical properties.
Products match forged parts’ performance—ideal for high-strength, high-toughness structural or safety-critical components (e.g., automotive chassis, steering knuckles).
Vertical injection and slow filling drastically reduce air entrapment and porosity, enhancing gas tightness.
Castings have a clean surface, require minimal secondary machining, and offer high dimensional accuracy—boosting efficiency.
Supports mass automated production. Efficiency surpasses forging and is comparable to die casting.
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