Improvement of tool life in cold forging by locally optimized surfaces

Wagner, K.; Putz, A.; Engel, Ulf

doi:10.1016/j.jmatprotec.2006.03.229

Cited by 21 publications

(8 citation statements)

References 2 publications

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“…At the same time it has to retain enough lubricant to enable the formation of hydrostatic and hydrodynamic lubrication effects which allow the lubricant to flow into the contact zone of tool and workpiece. Another task of the surface is to store particles of wear (Wagner et al, 2006). Extremely smooth surfaces as often used for cold forging tool neither support the transportation, storage and distribution of lubricant nor the transportation of wear particles.…”

Section: Laser Surface Texturingmentioning

confidence: 99%

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Tool life enhancement in cold forging by locally optimized surfaces

Wagner

Völkl

Engel

2008

Journal of Materials Processing Technology

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Section: Laser Surface Texturingmentioning

confidence: 99%

“…In this context, an ideal surface must feature small valleys with a suitable micro geometry in which lubricant can be trapped. That leads to a delivery of lubricant during deformation, hence acting as lubricant pockets (Wagner et al, 2006).…”

Section: Laser Surface Texturingmentioning

confidence: 99%

Tool life enhancement in cold forging by locally optimized surfaces

Wagner

Völkl

Engel

2008

Journal of Materials Processing Technology

Self Cite

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“…In metal forming, the tools are exposed to extremely high loads, and the failure mechanism is mostly initiated on the tool surface. Surface texture has been proven already in some industrial application to increase tool life [70][71][72]. In the macro industry, some samples have successfully realized reductions in friction coefficient from 0.12 to 0.10 compared to a lapped smooth surface without texturing [73][74][75][76].…”

Section: Micro Structured Surfacementioning

confidence: 99%

Friction related size-effect in microforming – a review

2014

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This paper presents a thorough literature review of the size effects of friction in microforming. During miniaturization, the size effects of friction occur clearly. The paper first introduces experimental research progress on size effects of friction in both micro bulk and sheet forming. The effects of several parameters are discussed. Based on the experimental results, several approaches have been performed to develop a model or functions to analyse the mechanism of size effects of friction, and simulate the micro deep drawing process by integrating them into an FE program. Following this, surface modification, e.g. a DLC film and a micro structure/textured surface, as a method to reduce friction are presented. Finally, the outlook for the size effect of friction in the future is assessed, based on the understanding of the current research progress.

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“…[1][2] . This affects its durability, making necessary its replacement in shorter operating periods.…”

Section: Introductionmentioning

confidence: 99%

Deposition of Multicomponent Chromium Carbide Coatings Using a Non-Conventional Source of Chromium and Silicon with Micro-Additions of Boron

et al. 2017

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The chromium carbide coatings are widely used in the mechanical industry due to its corrosion resistance and mechanical properties. In this work, we evaluated a new source of chromium and silicon with micro-additions of boron on the deposition of multi-component coatings of chromium carbides in W108 steel. The coatings were obtained by the pack cementation method, using a simultaneous deposition at 1000 o C for 4h. The coatings were analyzed by X-ray diffraction, X-ray energy dispersive spectroscopy, optical microscopy, microhardness test method and pin-on-disc wear test. It was found that the coatings formed on W108 steel were mainly constituted by (Cr,Fe) 23 C 6 , (Cr,Fe) 7 C 3 , Cr 5-x Si 3-x C x+z , Cr 3 B 0,44 C 1,4 and (or) Cr 7 BC 4 . The carbide layers showed thicknesses between 14 and 15 µm and maximum values of microhardness between 15.8 and 18.8 GPa. Also, the micro-additions of boron to the mixtures showed statistically significant influence on the thickness, microhardness and abrasive wear resistance of the carbide coatings.

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Improvement of tool life in cold forging by locally optimized surfaces

Cited by 21 publications

References 2 publications

Tool life enhancement in cold forging by locally optimized surfaces

Tool life enhancement in cold forging by locally optimized surfaces

Friction related size-effect in microforming – a review

Deposition of Multicomponent Chromium Carbide Coatings Using a Non-Conventional Source of Chromium and Silicon with Micro-Additions of Boron

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