**4. Conclusions**


the laser center is not so great. The laser power is proportional to the temperature of cladding, the maximum temperature increases with the laser power. The scanning speed is inversely proportional to the maximum temperature during cladding, and the maximum temperature decreases with the increase of scanning speed. The laser power and scanning speed are proportional to the thermal stress at the sample point and the thermal stress increases with the increase of laser power and scanning speed. For the von Mises thermal stress cycle curve, the thermal stress curve of most samples has two peaks. This is mainly due to the solid-liquid phase transition process in laser cladding, but when the sample point is outside the molten pool, because the material at the sample point is not melted, then the corresponding peak value of the von Mises thermal stress curve is not obvious. Based on this feature, the depth of the molten pool can be predicted.


**Author Contributions:** Conceptualization, F.Y.; methodology, F.Y.; software, F.Y.; validation, L.F.; formal analysis, F.Y.; investigation, F.Y.; data curation, F.Y.; writing—original draft preparation, F.Y.; writing—review and editing, F.Y.; visualization, F.Y., L.F. All authors have read and agreed to the published version of the manuscript.

**Funding:** This research received no external funding.

**Institutional Review Board Statement:** Not applicable.

**Informed Consent Statement:** Not applicable.

**Conflicts of Interest:** The authors declare no conflict of interest.
