Wear in cold rolling milling rolls: A methodological approach

Gonçalves, José Lucio; Mello, José Daniel Biasoli de; Costa, H.L.

doi:10.1016/j.wear.2018.12.005

Cited by 26 publications

(13 citation statements)

References 21 publications

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“…Despite the relatively low hardness, the soft DLC resulted in small spallation on a rough surface, and could withstand high contact pressures with adequate tribological performance, paving a possible way for its future use in textured metalforming tools. The results showed that the occurrence of spallation was very small, and the tribological performance was at least comparable (or superior) to results in the literature regarding friction and wear of textured tool materials coated with hard chrome using ball-on-flat tests [8,50].…”

Section: Discussionsupporting

confidence: 70%

“…Such variations can be considered small for dry tests under high contact pressures. Under real rolling conditions, the changes of topographic parameters for a textured roll coated with hard chrome between the new condition and after a rolling campaign were around a 50% reduction of Sq, 50% reduction of Sdq and 60% reduction of Spk [50]. Under lubricated conditions, the changes in topographic parameters (not presented) were not statistically significant.…”

Section: Discussionmentioning

confidence: 85%

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Combined Use of Surface Texturing, Plasma Nitriding and DLC Coating on Tool Steel

et al. 2021

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In cold rolling, a textured roll can be used to imprint a desired surface topography onto the sheet during rolling. This work proposes the use of diamond-like carbon (DLC) coatings to protect the surface topography of the rolls in replacement of the carcinogenic hard chrome. For that, hydrogenated amorphous carbon (a-C:H) was deposited on plasma nitrided tool steel, both for ground and textured specimens. Changes in surface topography due to DLC coating were assessed using a confocal microscope. Coating adhesion was evaluated using the method VDI 3198. The specimens were characterized using X-ray diffraction (XRD), microhardness test and scanning electron microscopy (SEM). The coating was characterized using Raman spectroscopy (RS) and X-ray photoelectron spectroscopy (XPS). The results showed a soft multilayer coating consisting of a plasma nitrided layer for load support, a Si-rich interlayer to improve adhesion and an a-C:H top layer. DLC deposition reduced the roughness of the textured specimens. The coating resulted in relatively stable friction and good durability, with small damage and negligible wear even under dry sliding.

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Section: Discussionsupporting

confidence: 70%

Section: Discussionmentioning

confidence: 85%

Combined Use of Surface Texturing, Plasma Nitriding and DLC Coating on Tool Steel

et al. 2021

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“…A mill roll surface is commonly made of high strength steel and may range from mirror bright to “mill finish” depending on the operation and product to be manufactured [ 35 ]. Certain manufacturing processes, such as laser texturing, may result in a more deterministic pattern, whereas others, such as electrical discharge texturing, result in a random topography [ 36 , 37 , 38 ]. In this work, an artificially created random isotropic surface, which can be generated following, e.g., [ 39 , 40 ], was used as the reference topography to represent a rigid rough tool.…”

Section: Methodsmentioning

confidence: 99%

Influence of the 6061 Aluminium Alloy Thermo-Viscoplastic Behaviour on the Load-Area Relation of a Contact

et al. 2021

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The contact between solids in metal-forming operations often involves temperature-dependent viscoplasticity of the workpiece. In order to estimate the real contact area in such contexts, both the topography and the deformation behaviour should be taken into account. In this work, a deterministic approach is used to represent asperities in appropriately shaped quadratic surfaces. Such geometries are implemented in indentation finite element simulations, in which the indented material has thermo-viscoplastic properties. By creating a database of simulation data, investigations in terms of contact load and area for the specifically shaped asperities allow for an analysis on the influence of the material properties on the load–area relation of the contact. The temperature and viscoplasticity greatly define how much load is supported by a substrate due to an indenting asperity, but the description of the deformation behaviour at small values of strain and strain rate is also relevant. The pile-up and sink-in regions are very dependent on the thermo-viscoplastic conditions and material model, which consequently affect the real contact area calculation. The interplay between carried load and contact area of a full surface analysis indicates the role that different sized asperities play in the contact under different thermomechanical conditions.

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“…In recent decades, nanocomposite lubricants have attracted extensive attention in the industry because of their good physical and chemical properties (Du et al , 2018; Gonçalves et al , 2019; Holmberg et al , 2017). Compared with traditional lubricants, nanocomposite lubricants are a combination of nanoparticles and liquid lubricants, including h-BN (Podgornik et al , 2015), which can meet emission and environmental requirements (Panagopoulos and Georgiou, 2010; Zhang et al , 2014).…”

Section: Introductionmentioning

confidence: 99%

Preparation and tribological properties of SiO₂/WO₃ nanocomposite lubricant

Zhang

Xiong²,

Gao³

et al. 2022

ILT

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Purpose WO3 particles were prepared by the sol-gel method. Tetraethyl silicate (TEOS) was used to obtain a SiO2-coated WO3 nanoparticle. Quantum chemical parameters of oleic acid, triethanolamine, glycerol and methyl pentane as dispersants were theoretically calculated. Tribological properties of SiO2/WO3 nanocomposite lubricant were carried out on an MRS-10A four-ball friction and wear tester. Design/methodology/approach The purpose of this study is to investigate the preparation and tribological properties of SiO2/WO3 nanocomposite lubricant. Findings The obtained SiO2-coated WO3 nanoparticle (nano-SiO2/WO3) with a particle size of about 70 nm. The calculated adsorption energy of triethanolamine on the surface of the steel ball is 554.6 eV, and triethanolamine is selected as the dispersant. The dispersion effect of SiO2/WO3 nanocomposite lubricant is good, which shows that triethanolamine oleate plays a good dispersion role in the preparation of lubricant, which is consistent with the calculation results of the adsorption capacity of dispersant. As a good auxiliary lubricant, SiO2 can improve the tribological properties and wear resistance of WO3. Originality/value Nanocomposite lubricants have been the focus of research in recent years, which could greatly reduce energy consumption. And the SiO2/WO3 exhibited excellent lubrication performance as a lubricant additive. The lubrication mechanism of SiO2/WO3 nanocomposite lubricant is the synergistic lubrication mechanism of friction film lubrication and antifriction bearing. This study could provide a certain reference for the practical application of nanocomposite lubricants.

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Wear in cold rolling milling rolls: A methodological approach

Cited by 26 publications

References 21 publications

Combined Use of Surface Texturing, Plasma Nitriding and DLC Coating on Tool Steel

Combined Use of Surface Texturing, Plasma Nitriding and DLC Coating on Tool Steel

Influence of the 6061 Aluminium Alloy Thermo-Viscoplastic Behaviour on the Load-Area Relation of a Contact

Preparation and tribological properties of SiO₂/WO₃ nanocomposite lubricant

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Wear in cold rolling milling rolls: A methodological approach

Cited by 26 publications

References 21 publications

Combined Use of Surface Texturing, Plasma Nitriding and DLC Coating on Tool Steel

Combined Use of Surface Texturing, Plasma Nitriding and DLC Coating on Tool Steel

Influence of the 6061 Aluminium Alloy Thermo-Viscoplastic Behaviour on the Load-Area Relation of a Contact

Preparation and tribological properties of SiO2/WO3 nanocomposite lubricant

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Preparation and tribological properties of SiO₂/WO₃ nanocomposite lubricant