High-Temperature Sliding Wear Testing of Cathodic Arc Physical Vapor Deposition AlTiN- and AlTiON-Coated Hot Work Tool Steels

Birol, Yücel; İsler, Duygu; Ürgen, Mustafa

doi:10.1007/s11661-010-0474-1

Cited by 6 publications

(4 citation statements)

References 57 publications

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“…Aşınma sırasında oluşan oksitlerin bir yağlayıcı görev üstlendiği ve sürtünme katsayısını azalttığı daha önce birçok çalışmada vurgulanmıştır [10,11] olası bir nedeni olarak hematit (Fe2O3) fazının katı bir yağlayıcı gibi davranan manyetit (Fe3O4) fazına dönüşümü olarak ileri sürülmektedir [12]. Ancak sıcaklığın 600℃'ye yükselmesiyle RAH değerinin artması işlem görmemiş AISI 1020 çeliğinin yumuşaması, yüzeyde oluşan Fe3O4 veya Fe2O3 oksitlerin zayıf yapışması ve düşük sünekliği [13] ile açıklanabilir.…”

Section: Sonuçlar Ve Tartışmalar (Results and Discussion)unclassified

Elektrokimyasal olarak borlanan düşük karbonlu çeliğin yüksek sıcaklık aşınma ve oksidasyon davranışı

Mindivan

2022

Gazi Üniversitesi Mühendislik Mimarlık Fakültesi Dergisi

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Bu çalışma kapsamında yüksek sertlik ve aşınma direncine sahip kaplama çeşidi olan tek fazlı Fe2B tabaka AISI 1020 çelik yüzeyinde, elektrokimyasal borlama faz homojenizasyon (PHEB) yöntemiyle oluşturulmuştur. Metalografik çalışmalar ve XRD analizleri, düşük karbonlu çelik yüzeyinde tek fazlı Fe2B tabakasının oluştuğunu ortaya çıkarmıştır. 950 °C'de 60 dakikalık işlemden (15 dakika elektrokimyasal borlama ve 45 dakika faz homojenizasyon) sonra yüzeyde 1450±50 HV0.05 yüzey sertliğinde 57 µm kalınlığında Fe2B tabakasının çeliğe mükemmel yapışma ile büyütülebildiği belirlenmiştir. Oksidasyon ve yüksek sıcaklık aşınma deney sonuçları birlikte değerlendirildiğinde; 400 °C’ de yapılan oksidasyon deneylerinde benzer oksitlenme eğilimi gösteren AISI 1020 çelik ve tek fazlı bor kaplamanın aşınma davranışı benzer iken, 600 °C’de gerçekleştirilen oksidasyon deneylerinde en az ağırlık kazancı gösteren tek fazlı bor kaplama AISI 1020 çeliğine göre % 55,4 oranında daha az aşındığı tespit edilmiştir.

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Section: Sonuçlar Ve Tartışmalar (Results and Discussion)unclassified

Elektrokimyasal olarak borlanan düşük karbonlu çeliğin yüksek sıcaklık aşınma ve oksidasyon davranışı

Mindivan

2022

Gazi Üniversitesi Mühendislik Mimarlık Fakültesi Dergisi

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“…The lowest oxidation was observed at the tip of the duplex-TiN-TiAlN pin. This was because of the formation of Al 2 O 3 oxide on the surface of the duplex-TiN-TiAlN pin [29,30]. Due to the contact of brittle Al 2 O 3 with hard Fig.…”

Section: At 700°cmentioning

confidence: 99%

“…12 Quantified values of R a , R sk , and R ku in the sliding direction (A direction in Fig. 1a) of wear tracks at a 25°C, b 250°C, and c 700°C counterface (Sapphire at 600°C [29] or 440C stainless steel at 700°C [30]), hard abrasive particles were formed. The particles created triple tribo-system and increased the coefficient of friction.…”

Section: At 700°cmentioning

confidence: 99%

A comparative study of surface deformation and quality of brass workpiece in contact with coated dies by pin-on-disc testing

Ebrahimzadeh

Ashrafizadeh

2014

Int J Adv Manuf Technol

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Manufacturing technology must ensure the production of parts with required characteristics: dimensional accuracy, overall strength, and surface quality. The surface layers in metal forming generally remain at the surface. The quality of the deformed surface is therefore determined by the initial surface and the history of the various forming processes undergone. Surface roughness influences surface quality and wear of metal forming products. Pin-on-disc tests at a range of temperatures were employed to study the influence of die coatings on the surface quality of a two-phase brass alloy during forging operation. The pins were made in H13 hot work tool steel and given duplex surface treatments including plasma nitriding and physical vapor deposition (PVD) coatings. The discs were machined from CuZn38Pb2 forging brass. Mechanical properties, surface roughness, and compositional properties of pins were determined by nanoindentaion, two-dimensional profilometer, and scanning electron microscopy equipped with energy-dispersive X-ray detector, respectively. At 25°C, wear track parameters were more affected by the changes in Young's modulus and the surface roughness of the pins. At 250°C, the highest tendency to adhesion was observed in H13 steel pin. At 700°C, oxidation of the pins influenced the wear track parameters on the discs. R a parameters inside the wear tracks were constant at 25 and 250°C, but R ku parameters were maximum for the wear tracks of disc in contact with plasma nitriding and H13 pins at 25 and 250°C, respectively. At 700°C, the lowest surface quality was for the disc in contact with H13 steel pin. It was concluded that in forging process of brass alloys, the surface quality and deformation behavior of workpiece were improved by applied PVD coating on the surface of the die.

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“…Such coatings must offer thermal and chemical stability as well as adequate resistance to thermal fatigue, oxidation and abrasion by the slurries. There have been several attempts to explore the potential of PVD coatings in thixoforming tools [14,[16][17][18][19]. There have been several attempts to explore the potential of PVD coatings in thixoforming tools [14,[16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Thermal Fatigue Testing of Duplex-Coated Hot Work Tool Steels at Elevated Temperatures

Birol¹

2011

AIP Conference Proceedings

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Thermal fatigue is one of the principal failure mechanisms in thixoforming dies. PVD coatings provide adequate protection against oxidation of hot work tool steels but fail to improve thermal fatigue resistance. The extensive softening of the tool steel substrate and the thermal expansion mismatch between the hot work tool steel and the PVD coatings are held responsible. Hot work tool steel samples were plasma nitrided before coating with CrN/AlTiN using the Cathodic Arc Physical Vapour Deposition process. The duplex-coated samples thus obtained were submitted to thermal cycling under conditions which approximate thixoforming of steels. Plasma nitriding before PVD provides the much needed substrate support and has a very favourable impact on the thermal fatigue performance of the tool steel. The results from the thermal fatigue tests of the duplex-coated tool steel samples will be discussed and compared with tool steel samples coated via PVD alone.

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High-Temperature Sliding Wear Testing of Cathodic Arc Physical Vapor Deposition AlTiN- and AlTiON-Coated Hot Work Tool Steels

Cited by 6 publications

References 57 publications

Elektrokimyasal olarak borlanan düşük karbonlu çeliğin yüksek sıcaklık aşınma ve oksidasyon davranışı

Elektrokimyasal olarak borlanan düşük karbonlu çeliğin yüksek sıcaklık aşınma ve oksidasyon davranışı

A comparative study of surface deformation and quality of brass workpiece in contact with coated dies by pin-on-disc testing

Thermal Fatigue Testing of Duplex-Coated Hot Work Tool Steels at Elevated Temperatures

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