The aim of this experimental study is to improve hardness layer thickness and wear resistance through laser quenching. Laser quenching treatment is used as a part of duplex treatments to improve the thickness and hardness of surface layers of steels. This duplex treatment allow to reach a very high hardening depth, improving wear resistance and load bearing capacity. In present study the surface properties of a low carbon steel treated by low-pressure carburizing prior to a laser quenching process are investigated. Results demonstrate that laser quenching is an effective means of improving wear resistance of low-pressure carburized layer and the improvement is significantly affected by increase of hardened layer thickness.

This research paper focuses on a novel duplex treatment combining low-pressure carburizing and laser quenching to reach high surface hardness and hardening depth, improving wear resistance and mechanical properties. Results of microstructural analysis, micro- and nanohardness, wear and x-ray diffraction tests, carried out on laser-treated, carburized and duplex-treated C20 low-alloy steel, demonstrate that the novel duplex treatment developed greatly enhances wear resistance of the material.

A Novel Duplex Treatment of C20 Steel Combining Low-Pressure Carburizing and Laser Quenching / Sola, R.; Veronesi, P.; Giovanardi, R.; Parigi, G.. - In: JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE. - ISSN 1059-9495. - 26:11(2017), pp. 5396-5403. [10.1007/s11665-017-2965-3]

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