Prediction and Control of Heat Treat Distortion of Helicopter Gears.
Final rept. un 92-May 95,
LITTLE (ARTHUR D) INC CAMBRIDGE MA
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A helicopter gear heat treatment distortion modelling approach was developed using a commercially available finite element program. The model. predicts distortion and residual stresses resulting from carburization, hardenquench and temper processes performed on gears fabricated from 9310 steel. Accurate prediction of heat treatment distortion could aid in the design of gears, heat treatment processes and quench dies to reduce distortion. This would result in a significant reduction in scrap and rework for new gear designs. The model development included the development of constitutive equations, gathering of materials property data and determination of heat transfer coefficients. The model was demonstrated on a simple flat disk geometry and a rimwebaccessory gear blank. Model results are compared to experimental heat treatments of these configurations.
- Computer Programming and Software
- Machinery and Tools