China Centrifugal Casting Service & Factories

Centrifugal casting applies rotational speeds that generate up to 100G of force on molten metal during solidification. This force drives denser liquid metal outward while forcing lighter impurities, gas pockets, and slag inward to the inner diameter (ID). The resulting part exhibits near-zero porosity, superior mechanical properties, and higher density compared to static sand casting.

Horizontal centrifugal casting machines typically accommodate outside diameters (OD) from 50 mm up to 1,500 mm with continuous lengths reaching up to 6,000 mm (6 meters). Vertical centrifugal machines can produce large-diameter rings, flanges, and gear blanks with ODs up to 3,000 mm and heights up to 1,200 mm.

Because impurities gather along the inner bore during rotation, a standard machining allowance of 3 mm to 10 mm is added to the ID depending on wall thickness and alloy type. Precision CNC boring cleanly removes this layer, leaving pure, defect-free metal.

While centrifugal casting is optimized for symmetric cylinders and rings, specialized vertical molds can feature external ribs, flanges, or steps on the OD. However, internal bore geometries (ID) will always naturally solidify into a true cylinder due to rotational physics.

Standard shipments include EN 10204 3.1 Material Test Reports (MTR) covering chemical composition (OES spectrometer analysis), mechanical tensile/yield/elongation data, hardness tests, and non-destructive examination (UT/RT/PT) reports. Independent third-party inspection (SGS, TUV, Bureau Veritas) is also available upon request.

Bi-metallic casting pours the second metal alloy into the spinning mold while the first alloy is still within its liquidus-solidus temperature window. This precise thermal timing creates a true metallurgical atomic bond between the two layers, preventing delamination even under high thermal shock and mechanical strain.

For existing mold sleeves, prototype samples can be poured and rough-machined in 2 to 3 weeks. Custom metal die creation typically takes 3 to 4 weeks. Full production runs are generally completed within 4 to 6 weeks, depending on order volume and NDT testing requirements.

Leading suppliers enforce strict IP protection policies, including signing enforceable Non-Disclosure Agreements (NDAs), maintaining secure offline CAD servers, and restricting file access exclusively to assigned project engineers.