Enhanced hardness and friction behaviour of 40Cr steel by laser surface texturing after ultrasonic surface rolling Online publication date: Fri, 15-Oct-2021
by Zhou Yang; Genshang Wu; Jinggan Shao
International Journal of Surface Science and Engineering (IJSURFSE), Vol. 15, No. 3, 2021
Abstract: This paper constructs a new type of wear-resistant layer on material surface by laser surface texturing and ultrasonic surface rolling. Different from the traditional anti-wear layer, there is no obvious mechanical property difference between the anti-wear layer and material matrix, which can effectively prevent the anti-wear layer falling off and improve fatigue life of material. Meanwhile, the anti-wear layer can also collect wear debris. A hardening layer is formed on the material surface by ultrasonic rolling, and then the surface texturing is machined on the hardening layer by laser. The friction behaviour of anti-wear layer is studied by friction and wears experiment. The experimental results show that the new anti-wear layer has low friction coefficient and surface roughness. The specimen with laser surface texturing (LST) and ultrasonic surface treatment (USR) has more smaller wear depth under the same conditions.
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