Inconel 718 Turbine Wheel

An age-hardened wheel must preserve hub, airfoil and shaft geometry

An Inconel 718 turbine wheel integrates airfoils and a hub in a rotating component defined by its equipment design. Product form and age-hardening condition establish the material basis; passage shape, hub transitions and the shaft interface establish the finishing problem. ForceBeyond supports custom 718 wheel manufacturing and supply enquiries for a loose wheel or a specified wheel-shaft package. Actual thermal service, source qualification and assembly operations require program-specific evaluation.

The material route is more specific than the 718 name

Special Metals’ 718 bulletin describes precipitation hardening and product-condition-dependent properties. A wheel made from a wrought blank and one supplied to a cast-product specification cannot be treated as equivalent merely because both use the 718 designation. The approved route and thermal state belong in the component definition.

Material and assembly states to keep distinct

The table defines supply boundaries; it does not assert that a joining or rotor-test source is already approved.

Airfoil-to-hub transitions carry the integral rotor load

The wheel transfers gas loading through integral airfoils to the hub and shaft. Thin edges, passage surfaces and local fillets have different machining access from the bore or pilot. Their final geometry must be related to a consistent rotor axis and surface state.

Thermal treatment, stock removal and assembly can change that relationship. The approved sequence should identify the dimensional state at each acceptance stage rather than assume an upstream wheel report also accepts a finished wheel-shaft rotor.

Finishing and joining need separate process definitions

For the approved blank, machining establishes accessible passages, hub features and shaft interfaces. Required surface condition and permitted balance-correction regions must follow the drawing. If the scope includes joining, its method, qualification and post-join inspection are separate obligations.

Material traceability, required NDT, profile dimensions and interface runout must remain linked to the delivered item. Balance describes mass distribution and is not proof of casting soundness, joint integrity or geometric conformance. Rotor testing should be priced only with defined methods and acceptance criteria.

Establish the bore or pilot axis on the accepted blank, then machine accessible airfoil passages and hub transitions while preserving fillet and edge requirements. Inspect profile, hub faces and shaft-interface runout in the released fixture state; after any approved wheel-shaft joining, repeat the applicable axis and joint checks on the assembly. The page image is illustrative and does not verify the depicted component's alloy, thermal condition or delivered configuration.

718 versus 713C is a route and service comparison

IN 713C producer data describe a cast nickel airfoil alloy with another chemistry. The 713C wheel page concentrates on near-net casting and hub/airfoil soundness. It is not an automatic replacement for a 718 wheel with a specified wrought or cast condition. Component loading, thermal cycle and approved life data decide the choice.

Custom 718 wheel manufacturing and supply

ForceBeyond can coordinate a defined blank, finishing or assembly proposal subject to source-specific capability and approval confirmation. The RFQ should identify product form, thermal condition, rotor geometry, critical surfaces, joining and balance/test obligations, inspection records, quantities and schedule. Wheel-only and verified-assembly pricing should state their different deliverables.