High-Temperature Alloy Casting Turbine Parts Treatment Factory

Core Heat Treatment Capabilities for Equiaxed Castings

Our thermal cycles are engineered to meet turbine OEM and aerospace standards for grain control, residual stress management, and mechanical property optimization.

• Solution treatment for gamma prime phase uniformity

• Aging treatment to increase yield strength and creep resistance

• Stress-relief annealing post-casting or machining to eliminate internal residual stress

• Controlled ramp rates and inert atmosphere for oxidation-sensitive parts

All heat treatments conform to AMS 2774, AMS 5662/3, and customer-specific turbine alloy protocols.

Superalloys Commonly Heat Treated

These alloys benefit from phase strengthening and microstructure densification via tightly controlled temperature-time profiles.

Case Study: Heat Treatment of Equiaxed Rene 77 Vane Ring Segments

Project Background

An aerospace customer submitted a batch of equiaxed Rene 77 cast vane segments requiring full-cycle thermal processing. The cycle included solution treatment at 1160°C, aging at 845°C for 24 hours, and final stress relief at 870°C. All parts met OEM microstructure and hardness requirements.

Typical Heat Treated Component Models and Applications

All components are validated for grain size, phase structure, and hardness consistency post-treatment.

Heat Treatment Challenges for Equiaxed Superalloy Castings

1. Uniform temperature distribution is critical to prevent grain boundary liquation and deformation

2. Controlled ramp rates ≤ 10°C/min reduce thermal shock and structural distortion

3. Atmospheric control (vacuum or argon) needed to suppress oxidation on critical surfaces

4. Repeatability of microstructure across thick and thin cast cross-sections

5. Residual stress relief required before CNC finishing or coating application

Certified Heat Treatment Solutions

• Multi-zone furnaces with ±2°C thermal uniformity across load volume

• Vacuum or argon purged chambers for reactive alloys like Rene and Hastelloy

• Cycle programming with real-time data logging for full traceability

• **Integrated post-treatment cleaning and passivation

• HIP available as a combined service to eliminate porosity

Results and Verification

Thermal Process Execution

All cycles followed material-specific solution and aging protocols with soak times validated by thermocouple mapping. Castings were fixtured to minimize deformation during high-temperature exposure.

Post-Treatment Finishing

After treatment, parts underwent CNC machining or EDM. Surfaces were cleaned and passivated per AMS2700 for oxidation protection.

Inspection and Testing

SEM analysis confirmed phase formation and grain refinement. Hardness testing validated mechanical targets. X-ray inspection confirmed structural soundness post-treatment.

FAQs

1. What heat treatment cycles are used for equiaxed turbine components?

2. Can Inconel and Rene alloys be treated together in one furnace batch?

3. How is oxidation prevented during high-temperature solution treatment?

4. What inspection methods verify phase transformation and hardness?

5. Do you offer HIP and CNC machining after heat treatment?