“…Important scientific contribution in this field and an insight into metallurgy, microstructure evolution, and mechanical properties of laser melted tool steels represent early works of Strutt et al [1,2], Mazumder [3] and Molian and Rajasekhara [4]. It was shown later by Vilar and Colaç o et al [5,6,[8][9][10], and Kusinski et al [7,11] that welldefined laser surface melting, controlled solidification as well as tempering are crucial for microstructure morphology and the proportions between martensite, retained austenite and carbides. Consequently, the mechanical properties of tool steels may be controlled.…”