1. Optimization Based on Orthogonal Experiment Design and Numerical Simulation for Carburizing Quenching Process of Helical Gear
- Author
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Dong-Ying Ju, Shan Miao, Yong Chen, and Yi-qi Liu
- Subjects
Quenching ,Materials science ,Polymers and Plastics ,Computer simulation ,Design of experiments ,Metals and Alloys ,Process (computing) ,Mechanical engineering ,Carburizing ,Mechanics of Materials ,Distortion ,Ceramics and Composites ,Combination method ,Holding time - Abstract
Predictions of distortion and hardness after heat treatment by numerical simulation are very useful for determining the optimum condition and for controlling the distortion of machinery parts. In this article, the combination method of orthogonal experiment and numerical simulation is used to optimize the standard heat treatment condition by reducing the distortion after carburizing quenching. A helical gear made of carburizing steel 20MnCrS5 is simulated using three-dimensional coupled analysis that is based on thermo-mechanical theory. The good agreement between the experiment and simulation is verified by the comparison between the experimental data and the simulated data. Firstly, the influencing factors of distortion after carburizing quenching are investigated and discussed. Four influence factors of heat treatment are selected as follows: carburizing time, the cooling time before 860°C, the holding time at 860°C, and the gear orientation during quenching. Next, selection of the optimal case is then determined by comparing the distortions. Finally, a new optimization method of minimum distortion after carburizing quenching is provided.
- Published
- 2018
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