**6. Concluding Remarks**

This review highlights the evolution of the characterization of the surface thermal treatment by laser in different iron castings, divided by the main constituents and structure of their matrix. Based on what is presented in this article, LST holds numerous advantages over conventional heat treatments, as it is a precise and highly localized process for which a harder and more wear-resistant microstructure is obtained without generating a significant distortion of the workpiece. The following main conclusions can be stated:


**Author Contributions:** Conceptualization, E.R.-M., A.B. and D.C.; methodology, N.C., E.R.-M. and D.C.; investigation, N.C.; writing–original draft preparation, N.C.; writing–review and editing, E.R.-M., A.B. and D.C.; visualization, E.R.-M.; supervision, E.R.-M. and D.C.; project administration, E.R.-M. and D.C.; funding acquisition, E.R.-M., A.B. and D.C. All authors have read and agreed to the published version of the manuscript.

**Funding:** A. Boccardo thanks the financial support received by a research gran<sup>t</sup> from Science Foundation Ireland (SFI) under gran<sup>t</sup> number 16/RC/3872. E. Ramos-Moore thanks FONDECYT-ANID project 1180564, and D. Celentano thanks FONDECYT-ANID project 1180591.

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

**Informed Consent Statement:** Not applicable.

**Data Availability Statement:** Any requirement about the data of the reviewed articles must be consulted directly to the corresponding authors.

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