Cost and performance evaluation of different surface treated dies for hot forging process

Bayramoğlu, Melih; Polat, Haydar; Geren, Necdet

doi:10.1016/j.jmatprotec.2007.11.256

Cited by 50 publications

(30 citation statements)

References 21 publications

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“…31,46 Traditionally, forging dies are subjected to different thermo-chemical treatments, mostly to nitriding in order to improve their wear resistance and lifetime. 55 However, due to the very high contact temperatures, all these treatments have only a limited effect. 46 On the other hand, investigations with hard coatings, including TiN, TiCN, CrN, TiB 2 , etc., show very promising results.…”

Section: Hot Forgingmentioning

confidence: 99%

Wear mechanisms and surface engineering of forming tools

Podgornik¹,

Leskovšek²

2015

Mater. Tehnol.

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The manufacturing of parts is faced with ever-increasing demands for higher strength (hardness) and toughness of the work material, as well as higher productivity and environmental concerns. At the same time, the quality requirements are high and will continue to grow in the future. This leads to restrictions in terms of the type and use of lubricants and especially to increased requirements relating to the wear and fatigue resistance of tools. The main focus on improving the wear resistance and tribological properties of forming tools has mainly been on developing tool steels with an improved fracture toughness and then modifying the lubricants for better retention and permeability at the tool/work-piece contact area. Nevertheless, the wear resistance of forming tools can also be successfully improved by surface-engineering techniques. In recent years, hard coatings in particular have shown enormous potential for improving the tribological properties of contact surfaces. This paper reviews the wear mechanisms encountered in forming processes, as well as various surface-engineering techniques designed to improve the wear resistance and the anti-sticking properties of forming tools. The possible benefits and restrictions of different surface-engineering techniques are presented for the example of sheet-metal forming, fine blanking and forging. Keywords: surface engineering, forming, hard coatings, topography, friction, wear Preoblikovalna industrija se spopada z nenehno nara{~ajo~imi zahtevami po vi{ji trdnosti (trdoti) in`ilavosti preoblikovanih materialov, kakor tudi ve~ji produktivnosti in skrbi za okolje. Isto~asno se pove~ujejo zahteve po kvaliteti izdelkov, kjer predvsem kvaliteta povr{ine postaja vedno bolj pomembna. To pomeni omejitve pri uporabi maziv ter seveda ve~je zahteve po obrabni odpornosti in vzdr`ljivosti preoblikovalnih orodij. Do nedavnega je izbolj{evanje obrabne obstojnosti in tribolo{kih lastnosti preoblikovalnih orodij temeljilo predvsem na razvoju bolj`ilavih in~istej{ih orodnih jekel ter modifikaciji maziv z bolj{imi mazalnimi lastnostmi. V zadnjih letih pa tudi na podro~ju preoblikovalnih orodij tehnike in`eniringa povr{in, {e posebej nanos trdih za{~itnih prevlek, omogo~ajo nadaljnje izbolj{anje tribolo{kih lastnosti kontaktnih povr{in. V prispevku so tako predstavljeni obrabni mehanizmi, ki so jim izpostavljena preoblikovalna orodja, kakor tudi razli~ne tehnike in`eniringa povr{ine, namenjene izbolj{anju obrabne obstojnosti in tornih lastnosti preoblikovalnih orodij. Problemi in prednosti uporabe in`eniringa povr{ine so poudarjene na primeru hladnega preoblikovanja plo~evine, {tancanja in kovanja.

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Section: Hot Forgingmentioning

confidence: 99%

Wear mechanisms and surface engineering of forming tools

Podgornik¹,

Leskovšek²

2015

Mater. Tehnol.

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“…Surface engineering techniques have been used to extend die life, such as nitrocarburizing, ion nitriding, surfacing welding, PVD, CVD, and so on (Lin, 2006). Bayramoglu al-so studied different surface coating techniques, such as nitriding, single layer AlTiN surface coating, multilayer TOKTEK surface coating and weld overlay surface coating, and found out that weld overlay coated die possessed the highest service life (Bayramoglu, 2008). The selection of surfacing electrode has a great influence on weld overlay coating.…”

Section: Introductionmentioning

confidence: 99%

A Kind of 6542 Surfacing Electrode for Hot Forging Die

P'an¹,

Xiao²,

Zhou³

et al. 2017

dtmse

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“…Meanwhile, damaged die is complex and difficult to analyse because of the mutual interactions between the factors involved in the mechanism of hot forming [2]. Bayramoglu et al [3] have investigated the effect of die coating on die life. The performance of dies has been evaluated on the basis of the ratio of expenses on dies over the number of the products that can be produced in a real production line.…”

Section: Introductionmentioning

confidence: 99%

Contribution in the evaluation of a performance index of hot forging dies

Bendjoudi

Becker

Bigot

et al. 2016

Int J Adv Manuf Technol

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The present paper focuses on a new concept of evaluation of a performance index of hot forging dies through the combination of a process behaviour model and a reliability approach analysis of the forging process. The process behaviour is modelled and simulated using the computer-aided engineering FORGE® tool that allowed optimizing the forging parameters and determining the stresses and strains together with temperatures during the forging process and also identifying the factors affecting the die life. The respective reliability mechanical model is developed and reliability simulations have been conducted using PHIMECASoft tool in order to evaluate the reliability index β and determine the sensitivity of the variations in the random values of the input parameters of the forging process. The concept of this contribution has been applied to real industrial dies used to forge automotive steering levers produced in the forging workshop of the Ferrovial Company of Annaba in Algeria. The performance index is given by the number of forged parts corresponding to the reliability index of the dies before failure occurs.

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Cost and performance evaluation of different surface treated dies for hot forging process

Cited by 50 publications

References 21 publications

Wear mechanisms and surface engineering of forming tools

Wear mechanisms and surface engineering of forming tools

A Kind of 6542 Surfacing Electrode for Hot Forging Die

Contribution in the evaluation of a performance index of hot forging dies

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