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Laser surface hardening (LSH) is an effective process to produce hard andwear resistant steel surfaces. This work produced hardened surfaces using afiber laser in a bare (B. uncoated) and carbon-coated (C) conditions. Theobtained hardness and microstructure were compatible to martensite (B) andcementite (C) major constituents. A low coefficient of friction was obtainedusing C-condition. The treated surface also presented little damage during areciprocating wear against a hard metal sphere.

Effect of laser surface hardening on a low carbon steel substrate wear and hardness