Laser polishing of tool steel with CO2 laser and high-power diode laser

Ukar, Eneko; Lamíkiz, Aitzol; Lacalle, Luís Norberto López de; Pozo, D. del; Arana, J.L.

doi:10.1016/j.ijmachtools.2009.09.003

Cited by 141 publications

(67 citation statements)

References 10 publications

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“…Electro chemical polishing and electropolishing have been reviewed by some researchers to improve the surface finish of SLM parts, but were found to have environmental issues [9]. Recently, laser polishing [6,10] has gained interest as it has shown potential for selective polishing of metals and alloys. Laser polishing involves melting a thin layer of the substrate, with surface tension causing the material to flow from peaks to valleys.…”

Section: Introductionmentioning

confidence: 99%

Laser polishing of selective laser melted components

Marimuthu

Triantaphyllou

Antar

et al. 2015

International Journal of Machine Tools and Manufacture

239

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Citation: MARIMUTHU, S. et al., 2015 AbstractThe shape complexities of aerospace components are continuously increasing, which encourages industries to refine their manufacturing processes. Among such processes, the selective laser melting (SLM) process is becoming an economical and energy efficient alternative to conventional manufacturing processes. However, dependent on the component shape, the high surface roughness observed with SLM parts can affect the surface integrity and geometric tolerances of the manufactured components. To account for this, laser polishing of SLM components is emerging as a viable process to achieve high-quality surfaces. This report details an investigation carried out to understand the basic fundamentals of continuous wave laser polishing of SLM samples. A numerical model, based on a computational fluid dynamic formulation, was used to assist the understanding of melt pool dynamics, which significantly controls the final surface roughness. The investigation identified the input thermal energy as the key parameter that significantly affect the melt pool convection, and essentially controls the surface quality. Minimum meltpool velocity is essential to achieve wider laser polished track width with good surface finish. Experimental results showed a reduction of surface roughness from 10.2μm to 2.4μm after laser polishing with optimised parameters. Strategies to control the surface topology during laser polishing of SLM components are discussed.

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Section: Introductionmentioning

confidence: 99%

Laser polishing of selective laser melted components

Marimuthu

Triantaphyllou

Antar

et al. 2015

International Journal of Machine Tools and Manufacture

239

View full text Add to dashboard Cite

show abstract

“…Figure 7 shows the initial roughness profile and polished profile for both materials In laser polishing, when surface asperities progressively melt, the roughness reduction reached will increase with the energy density up to a limit point. From that point, as energy density increases, the roughness reduction will decrease [Ukar, 2010].…”

Section: Bagging Algorithm (For Regression)mentioning

confidence: 97%

Modelling of process parameters in laser polishing of steel components using ensembles of regression trees

Bustillo

Ukar

Rodrı́guez

et al. 2011

International Journal of Computer Integrated Manufacturing

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“…Hafiz et al [2] have conducted laser polishing tests on H13 tool steel with different overlap percentages and improved the surface roughness by 87% through the reduction of S a from 1.35 m to 0.18 m using laser polishing. Ukar et al [14] have also obtained up to 92% reduction of average surface roughness by reducing R a from 4.40 m to 0.36 m on the milled and EDMed surface of DIN 1.2379 tool steel using a CO 2 laser and a high-power diode laser.…”

Section: Introductionmentioning

confidence: 95%