Tribological effects of the geometrical properties of plasma spray coatings partially melted by laser

Garcı́a, Agustı́n Costa; Cadenas, M.; Fernández, Marianela; Noriega, Á.

doi:10.1016/j.wear.2013.05.004

Cited by 30 publications

(7 citation statements)

References 23 publications

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“…El uso de paredes más gruesas y aceros de alta aleación para prolonga la vida útil de los componentes, es una alternativa muy costosa. Una solución es cubrir por rociado tér-mico los aceros de baja aleación con un material resistente a la erosión-corrosión como las aleaciones de tipo WC-Co, WC-Co-Ni, WC-Co-Cr, Ni-Cr-B-Si, entre otras [42,43]. En la industria siderúrgica hay fuertes desgastes por fricción del tipo metal-metal, en donde las piezas como las bobinadoras de trefilado se desgastan rápidamente.…”

Section: Ventajas Del Rociado Térmicounclassified

La tecnología de recuperación y protección contra el desgaste está en el rociado térmico.

Arévalo

2014

prospect

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La tecnología de recuperación y protección contra el desgaste está en el rociado térmico La tecnología de recuperación y protección contra el desgaste está en el rociado térmicoThe technology against the wearing is the thermal spray RESUMENLos recubrimientos por rociado térmico están ayudando a controlar y disminuir los problemas superficiales que implican desgaste y corrosión. Los recubrimientos por rociado térmico sirven para mejorar características mecá-nicas, físicas y químicas, dando calidades superiores de funcionamiento a la superficie. La variedad de productos y capas que se pueden obtener por rociado térmico, son virtualmente ilimitadas. Las técnicas de rociado térmico son sistemas de combustión por llama, oxi-combustible de alta velocidad, detonación; sistemas de arco eléctrico, plasma con arco transferido y no transferido. Estos procesos son usados con éxito en el mundo desarrollado y vienen incrementando las inversiones industriales en este campo, y también es usado por instituciones de investigación para el desarrollo de nuevas aplicaciones y la evaluación de las propiedades físicas, químicas y mecánicas de estas capas protectoras. La protección y modificación de la superficie y sus propiedades, son una herramienta potente en la ingeniería moderna, en donde las nuevas aplicaciones de la tecnología de rociado térmico son una alternativa técnica, económica y competitiva para la industria. También, permite mejorar la productividad de los procesos, contribuyendo a aumentar la funcionalidad de partes que trabajan bajo condiciones severas de desgaste.Palabras clave: Rociado térmico, Recubrimientos, Desgaste, Corrosión, Ingeniería de superficies. ABSTRACTThermal spray coatings are helping to control and reduce superficial problems involving wear and corrosion. Thermal spray coatings are profitable and serve to improve mechanical, physical and chemical performance giving superior qualities to the surface. The variety of products and layers that can be obtained by thermal spraying is virtually limitless. The techniques of thermal spraying are combustion systems by flame spray, high velocity Oxi-fuel, detonation and electric arc systems, plasma spray with transferred and not transferred arc. These processes are used successfully in the developed world and are increasing industrial investment in this field, and are also used by research institutes to develop new applications and to evaluate the physical, chemical and mechanical properties of protective coatings. The protection and surface modification and their properties, are a powerful tool of modern engineering, where, new applications of thermal spray technology is an alternative technical, economic and competitive in industry, Also, it can improve processes productivity, helping to increase the functionality of parts working under severe conditions of wear.

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Section: Ventajas Del Rociado Térmicounclassified

La tecnología de recuperación y protección contra el desgaste está en el rociado térmico.

Arévalo

2014

prospect

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“…Garcia et al [ 31 ] showed that partially laser remelted surfaces of plasma spray coatings reduce wear only under certain pressures and sliding velocities. Moreover, they observed that higher percentage of the remelted surface may cause inadequate lubrication conditions and increase the wear of elements [ 31 , 32 ]. Most friction pairs require lubrication, it is important to determine the influence of laser remelting for tribological processes under limited lubrication conditions.…”

Section: Introductionmentioning

confidence: 99%

“…Although real components usually work in a mixed lubrication mode [30], most publications limit the scope of their research to abrasive wear [15,19,21,22]. Garcia et al [31] showed that partially laser remelted surfaces of plasma spray coatings reduce wear only under certain pressures and sliding velocities. Moreover, they observed that higher percentage of the remelted surface may cause inadequate lubrication conditions and increase the wear of elements [31,32].…”

Section: Introductionmentioning

confidence: 99%

Experimental Analysis of Tribological Processes in Friction Pairs with Laser Borided Elements Lubricated with Engine Oils

et al. 2020

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The present study discusses the influence of engine oils on the tribological parameters of sliding couples with laser borided surface layer. The borided layer was formed on specimens made from AISI 5045 steel by laser remelting of a surface layer coated with amorphous boron. The sliding friction and wear process was carried out on the pairs with AISI 5045 steel and SAE-48 bearing alloys which were lubricated with 5W-40 and 15W-40 engine oils. The investigation showed significant differences in the friction coefficient and temperature in the tested pairs with the laser borided surface layer. In the couples lubricated with 5W-40 engine oil, the tested parameter of friction was higher than in the couples lubricated with 15W-40 engine oil. The couples lubricated with 5W-40 engine oil showed more intensive wear of SAE-48 bearing alloy in contact with the laser borided surface layer than the pairs lubricated with 15W-40 engine oil. The laser borided surface layer used in friction pairs leads to the destruction of the lubricating properties of engine oils and reduces its resistance to scuffing.

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“…The results indicated that the coating structure is coarsened with increasing laser power and the WC particles decompose Fe/C compounds, thus reducing the hardness of the coating. García et al [19] studied the effect of laser scanning trajectories and remelted area on the wear resistance of laser-remelted NiCrBSi coatings. They found that the laser scanning trajectory has little effect on the coating wear rate and the coating exhibits the best abrasion resistance when the area of the remelting is 46%.…”

Section: Introductionmentioning

confidence: 99%

Effect of Laser Scanning Speed on the Wear Behavior of Nano-SiC-Modified Fe/WC Composite Coatings by Laser Remelting

Zhao

2018

Coatings

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A supersonic plasma sprayed nano-SiC-modified WC/Fe metal-cermet composite coating was remelted with a fibre-pulsed laser at four different laser scanning speeds (100, 150, 200 and 250 mm·min −1 ) while the other parameters were kept constant. The microstructures, microhardness, and tribological properties of the coatings were analysed by means of SEM (scanning electron microscopy), XRD (X-ray diffractometer), and a friction tester, respectively. The results show that, when the laser scanning speed is 100 mm·min −1 , the remelted coating is most dense with regard to the coverage of the substrate. The coating with nano-particles became more smooth, and elements Si and C in the nano-particles reacted with Fe, Ni, or Cr and formed a hard mesophase that enhanced the strength and hardness of the coating. With the increase of laser scanning speed, the hardness of the four coatings increased first and then decreased, and the nano-SiC-modified remelted coating showed a maximum microhardness of about HV 0.5 1350, and the nano-particles made the coating's micro-structure finer, at a laser scanning speed of 150 mm·min −1 . The friction coefficient and wear rate of the four coatings were 0.58 and 12.01 × 10 −5 mm 3 /(N·m), 0.21 and 8.50 × 10 −5 mm 3 /(N·m), 0.62 and 20.04 × 10 −5 mm 3 /(N·m), and 1.23 and 25.13 × 10 −5 mm 3 /(N·m). The remelted coating at a laser scanning speed of 150 mm·min −1 exhibits the best wear resistance and its wear mechanism is governed by slight adhesion wear and plastic deformation.

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Tribological effects of the geometrical properties of plasma spray coatings partially melted by laser

Cited by 30 publications

References 23 publications

La tecnología de recuperación y protección contra el desgaste está en el rociado térmico.

La tecnología de recuperación y protección contra el desgaste está en el rociado térmico.

Experimental Analysis of Tribological Processes in Friction Pairs with Laser Borided Elements Lubricated with Engine Oils

Effect of Laser Scanning Speed on the Wear Behavior of Nano-SiC-Modified Fe/WC Composite Coatings by Laser Remelting

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