Surface cleaning of 34CrMo4 steel pipes by using pulsed fibre laser

Genna, Silvio; Leone, Claudio; Mingione, Emanuele

doi:10.1007/s00170-022-10648-8

Cited by 4 publications

(1 citation statement)

References 37 publications

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“…By changing the pulse frequency and the scanning speed, it is possible to change the pulse overlap, i.e., the distance between two consecutive laser footprints. The laser parameters were selected based on previous experience [51,52]. The values for the two laser treatments performed-laser cleaning (LC) and laser dots (LD)-are shown in Table 3.…”

Section: Methodsmentioning

confidence: 99%

Laser Texturing to Increase the Wear Resistance of an Electrophoretic Graphene Coating on Copper Substrates

Baiocco,

Genna,

Salvi

et al. 2023

Materials

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In the present paper, different surface preparations are investigated with the aim of increasing the wear behaviour of an electrophoretic graphene coating on a copper plate. The study was divided into two steps: In the first step (pre-tests), to detect the most promising pretreatment technology, five different surface preparations were investigated (electropolishing, sandblasting, degreasing and pickling, laser cleaning and laser dots).In the second step, on the basis of the results of the first step, a 32 full factorial plan was developed and tested; three treatment types (pickled and degreased, laser-cleaned, and laser dots) and three different voltages (30, 45 and 60 V) were adopted. Analysis of variance (ANOVA) was used to evaluate their influence on wear resistance; in particular, the maximum depth and width of the wear tracks and the coating break distance were investigated. The results of this study show that, in optimal conditions, laser treatment (particularly laser dots) canlead to as high as a four-fold increase in wear resistance.

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Section: Methodsmentioning

confidence: 99%