Gas turbine disks carry blade centrifugal loads and transmit torque through the rotor. Their bore, web and rim experience different combinations of stress, temperature and cyclic strain. A manufacturing route must produce the specified material structure before machining establishes the final interfaces. ForceBeyond supports custom disk manufacturing and supply enquiries for qualified blanks, finishing or coordinated part delivery. This hub explains the design-to-process relationship and connects buyers to the approved alloy topics.
Discuss a custom rotor disk. Send the disk drawing, material and blank-route specification, required inspection package and quantities. Request a custom quote.
The rim receives the blade load through slots or another attachment system. The web carries that load inward, while the bore or shaft interface locates the disk and transmits rotor forces. Fillets, bolt holes and attachment transitions may be local stress concentrations. Thermal expansion across the disk changes during acceleration, steady operation and shutdown.
Low-cycle fatigue, crack initiation, crack propagation and time at elevated load are related but separate concerns. A drawing and life assessment translate them into material condition, surface integrity and inspection requirements. Balance or overspeed verification, when required, does not replace the acceptance of material and critical dimensions.
| Stage | What it establishes | Typical control to define |
|---|---|---|
| Blank production | Material identity and prescribed structure | Melt/lot pedigree, permitted working route and material tests. |
| Thermal processing | Required condition and structural response | Cycle records, sampling and acceptance specification. |
| Finish machining | Bore, face and attachment geometry | Datum transfer, runout, fillets and surface condition. |
| Release | Conformance of the specified deliverable | Required NDT, dimensional records and any rotor test obligations. |
The table describes planning functions, not a universal inspection procedure. Methods and limits are set by the disk specification.
Special Metals’ alloy 718 bulletin describes an age-hardenable nickel alloy with condition-dependent properties. Powder-metallurgy disk alloys such as René 95 introduce a different material-processing history. Neither a nominal alloy comparison nor a forging capability establishes a qualified route for another disk.
ATI’s Ti-6Al-4V data lists compressor disks among its applications. That is useful context for titanium rotor enquiries, but it does not establish suitability in a hot turbine stage. Actual component location and approved alloy must accompany the drawing.
The 718 disk route starts with an approved wrought product form and controlled aging before final bore, rim and face acceptance. The unchanged René 95 disk page addresses powder-derived material and NASA fatigue/heat-treatment evidence. A blank-only order, rough-machined blank and finished disk transfer different datum and inspection responsibilities. Titanium examples on this site concern documented fan/compressor contexts until a specific turbine-stage design basis is supplied.
A forging drawing and a finished disk drawing serve different purposes. Stock allowance has to support machining of the bore, faces and attachment region while preserving traceability. Fixtures and measurement datums should link intermediate geometry to the finished rotor axis.
ForceBeyond can coordinate the requested blank or machined disk supply scope. Material approval, special processes and capacity are confirmed against the customer program. A quality plan should identify material tests, required NDT, critical measurements, documentation review and release responsibilities.
Identify a blank-only, rough-machined or finished-disk deliverable, then add the exact material specification, product route, drawing revision and inspection clauses. Quantity, tooling status and schedule help separate initial feasibility and first article from repeat production. Rotor testing belongs explicitly in the scope when required.
Blade attachments transfer centrifugal load into the rim, through the web and toward the bore or shaft interface. Local geometry and temperature gradients mean each region can have different material and surface requirements.
Working and thermal processing establish the structure on which material properties depend. Wrought, powder-derived and cast conditions cannot be assumed to have the same fatigue or crack-growth response.
No. Balance addresses mass distribution about the rotation axis. Material pedigree, prescribed structure, dimensions, surface condition and required NDT remain separate acceptance subjects.
A finished-disk scope includes the specified machining, final dimensions and release records. A blank quote stops at an intermediate condition and must define the material pedigree and stock remaining for downstream work.
Send the disk drawing, material and blank-route specification, required inspection package and quantities.
Expand this section to review the external standards, technical organizations, and reference materials used for this page.
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