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Our work entitled improvement of the mechanical properties of a Z80WCV 18-04-01 high-speed steel grooving cutter (three sizes) by heat treatment, the latter can play an essential role in improving the mechanical and structural properties of grooving mills. The results obtained showed that the heat treatments allow to obtain a favorable microstructure, with a martensitic phase formation and a homogeneous distribution of carbides. These structural changes have led to an increase in the hardness, strength and durability of the milling cutters to be grooved in addition, it has been observed that the application of cumulative revenues has a significant impact on the mechanical and structural properties. The successive revenues favored the transformation of quenching martensite into tempering martensite and the elimination of residual austenite, leading to a gradual increase in hardness and wear resistance. [ABSTRACT FROM AUTHOR]