fig9
![Machine learning based optimization method for vacuum carburizing process and its application](https://image.oaes.cc/62e52074-b9b8-4bc6-8d74-a3eeb4013765/5557.fig.9.jpg)
Figure 9. A: Selection of surface hardness; B: surface carbon; C: Martensitic phase transition.
Figure 9. A: Selection of surface hardness; B: surface carbon; C: Martensitic phase transition.
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