Wear and blanking performance of AlCrN PVD-coated punches

Çöl, Mustafa; Kır, Durmuş; Erişir, Ersoy

doi:10.1007/s11003-013-9532-3

Cited by 20 publications

(9 citation statements)

References 11 publications

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“…However, the wear behaviour of these layers, in particular for hot forming tools, has not been sufficiently investigated. According to Çöl et al [24] coated punches with AlCrN for sheet blanking have a higher wear resistance than uncoated surfaces [24]. In their study they were able to proof, that the predominant wear mechanisms are adhesion and abrasion, which is similar to the wear behaviour in hot stamping.…”

Section: Critical Wear Limit 3 X S Amentioning

confidence: 83%

Tribological and Thermal Investigation of Modified Hot Stamping Tools

Neubauer¹,

Merklein²

2019

Tribol. Ind.

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Direct hot stamping is an established manufacturing process to produce safety-relevant car body components, while t-he hot blank is formed and quenched simultaneously in a water cooled press. In order to protect the semi-finished parts against oxidation the surfaces are coated with aluminum silicon. As a side effect this coating system leads to adhesive wear on the tool surface, which reduces the tool life. Due to the high temperatures it is not possible to use lubricants as wear protection. For this reason a suitable surface modification for hot stamping tools is required to increase the wear resistance. In the scope of this study the tribological behavior of different modificatiosn is investigated. The main purpose of these wear protective layers is to decrease the adhesive wear on the tool surface. The wear characterization is carried out with a modified pin-on-disc test. During the experiments the pin is guided over the blank with a robot system. In addition, the contact area is cooled after each wear track to simulate the thermal alternating stresses of the hot stamping process. For the evaluation of the wear behavior a new developed analysis method is used, which enables the calculation of the adhesive and abrasive wear volume.

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Section: Critical Wear Limit 3 X S Amentioning

confidence: 83%

Tribological and Thermal Investigation of Modified Hot Stamping Tools

Neubauer¹,

Merklein²

2019

Tribol. Ind.

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“…After 800 strokes, tool wear for the untreated punch is more severe, with edge rounding due to wear (Figure 4(c)). Edge rounding increases the tool radius affecting the working capability of the punch [20] and could produce the formation of burr height in the blanked sheet [21]. Burr length is generally an important criterion in the industry to evaluate part quality [22] and the apparition of burr is the most incapacitating in the use of the blanking piece.…”

Section: Blanking Punch Testmentioning

confidence: 99%

Properties and in-service performance of components reated with thermo reactive deposition/diffusion

Marulanda

Toro

Castillejo

et al. 2018

Ingeniare. Rev. chil. ing.

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Properties and in-service performance of components reated with thermo reactive deposition/diffusionPropiedades y desempeño en servicio de componentes tratados con deposición/difusión termorreactiva ABSTRACT Machine components and tools subjected to aggressive environments and strong wear conditions need surfaces with good mechanical properties. The thermo-reactive deposition/diffusion (TRD) process is one of the methods used for improving the mechanical properties of these components and tools, mainly because of its low cost and good performance of the coatings deposited. Although the TRD process is widely used for coating dies, extrusion tools and punches among others, the in-service performance of cutting tools coated using the TRD process has not been extensively studied. In this study, niobium carbide coatings were deposited on cutting punches and screw taps using the TRD technique. Phase formation and micro-hardness of the coatings were studied using X-ray diffraction and Vickers measurements respectively, and the in-service performance of the coated and uncoated tools was studied through field tests conducted at different numbers of cuts. The results show that the coating significantly improves the wear resistance and the cutting performance of the tools, especially at higher numbers of cuts. RESUMENLos componentes de maquinaria y las herramientas sujetas a ambientes agresivos y fuertes condiciones de desgaste necesitan superficies con buenas propiedades mecánicas. El proceso de deposición/difusión termorreactiva (TRD) es uno de los métodos usados para mejorar las propiedades mecánicas de estos componentes y herramientas, principalmente por su bajo costo y buen desempeño de los recubrimientos depositados. Aunque el proceso TRD es ampliamente usado para recubrir moldes, herramientas de extrusión y punzones entre otros, el desempeño en servicio de herramientas de corte recubiertas usando el proceso TRD no ha sido estudiado extensamente. En este estudio se depositaron recubrimientos de carburo de niobio sobre punzones de corte y machos de roscado usando la técnica TRD. La formación de fases y la microdureza de los recubrimientos se estudió usando difracción de rayos X y dureza Vickers

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“…48,54 In the case of hard ceramic coatings, high friction leads to the adhesion of the work material to the tool surface and consequently for up to three times higher extraction forces and even up to ten times higher punching forces, which then lead to coating cracking and flaking (Figure 14). On the other hand, for DLC coatings, although initially reducing the punching forces, a high coating-wear rate in just a few strokes leads to failure of the cutting elements.…”

Section: Punching and Fine Blankingmentioning

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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Wear and blanking performance of AlCrN PVD-coated punches

Cited by 20 publications

References 11 publications

Tribological and Thermal Investigation of Modified Hot Stamping Tools

Tribological and Thermal Investigation of Modified Hot Stamping Tools

Properties and in-service performance of components reated with thermo reactive deposition/diffusion

Wear mechanisms and surface engineering of forming tools

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