MICROSTRUCTURAL AND TRIBOLOGICAL PROPERTIES OF NICKEL-BASED HARDFACING COATINGS APPLIED ON NITRIDING STEELS BY PLASMA TRANSFERRED ARC WELDING

Gökçe Mehmet Ay; Fatih Hayati Çakır; Abdullah Sert

Makale detayları

MICROSTRUCTURAL AND TRIBOLOGICAL PROPERTIES OF NICKEL-BASED HARDFACING COATINGS APPLIED ON NITRIDING STEELS BY PLASMA TRANSFERRED ARC WELDING

Yazarlar:

Gökçe Mehmet Ay | Fatih Hayati Çakır | Abdullah Sert

Yayıncı:

Eskişehir Osmangazi University

Ana Başlıklar:

Malzeme Tasarım ve Davranışları

Dergi:

Eskişehir Osmangazi Üniversitesi Mühendislik ve Mimarlık Fakültesi Dergisi Vol.33 Issue 2, pp.1809-1818

Belge Tipi:

Makale

Yayın Tarihi:

8/2025

Belge Dili:

İngilizce

Document ID (Org No.):

2001356295

pISSN:

2630-5712

Anahtar kelimeler:

Özet:

 Plasma Transferred Arc PTA coatings are widely used for the surface modification of metals due to their ability to achieve high coating thickness, low thermal stress, and high energy density. This technique is commonly applied to glass and ceramic molds, automotive valves, petrochemical vanes, lamination cylinders, as well as plastic extrusion molds and screws. In plastic injection machine screws, high hardness and wear resistance are essential for durability. To achieve these properties, the steels used in plastic injection screws are first hardfaced on the thread crests using the PTA coating method and then nitrided. In this study, 1.8550 and 1.8519 steels, commonly used in plastic injection screw manufacturing, were coated with two different powders: FeCrBSi with a nickel Ni balance, either with or without tungsten W addition. The tribological properties of the coated samples were evaluated through ball-on-disc wear tests. The samples were characterized using X-ray diffraction XRD, scanning electron microscopy SEM, energy-dispersive spectroscopy EDS, and optical microscopy. The depth and width of wear tracks were measured using a profilometer. Results indicated that increasing W content leads to a higher coefficient of friction, but the best wear performance was observed with W-containing coatings. The optimal combination was found to be the 1.8550 steel substrate paired with the FeCrBSi-W coating, which demonstrated a 5 higher coefficient of friction but a 47 lower specific wear rate compared to the non-W coating.

 Plasma Transferred Arc PTA coatings are widely used for the surface modification of metals due to their ability to achieve high coating thickness, low thermal stress, and high energy density. This technique is commonly applied to glass and ceramic molds, automotive valves, petrochemical vanes, lamination cylinders, as well as plastic extrusion molds and screws. In plastic injection machine screws, high hardness and wear resistance are essential for durability. To achieve these properties, the steels used in plastic injection screws are first hardfaced on the thread crests using the PTA coating method and then nitrided. In this study, 1.8550 and 1.8519 steels, commonly used in plastic injection screw manufacturing, were coated with two different powders: FeCrBSi with a nickel Ni balance, either with or without tungsten W addition. The tribological properties of the coated samples were evaluated through ball-on-disc wear tests. The samples were characterized using X-ray diffraction XRD, scanning electron microscopy SEM, energy-dispersive spectroscopy EDS, and optical microscopy. The depth and width of wear tracks were measured using a profilometer. Results indicated that increasing W content leads to a higher coefficient of friction, but the best wear performance was observed with W-containing coatings. The optimal combination was found to be the 1.8550 steel substrate paired with the FeCrBSi-W coating, which demonstrated a 5 higher coefficient of friction but a 47 lower specific wear rate compared to the non-W coating.

 Plasma Transferred Arc PTA coatings are widely used for the surface modification of metals due to their ability to achieve high coating thickness, low thermal stress, and high energy density. This technique is commonly applied to glass and ceramic molds, automotive valves, petrochemical vanes, lamination cylinders, as well as plastic extrusion molds and screws. In plastic injection machine screws, high hardness and wear resistance are essential for durability. To achieve these properties, the steels used in plastic injection screws are first hardfaced on the thread crests using the PTA coating method and then nitrided. In this study, 1.8550 and 1.8519 steels, commonly used in plastic injection screw manufacturing, were coated with two different powders: FeCrBSi with a nickel Ni balance, either with or without tungsten W addition. The tribological properties of the coated samples were evaluated through ball-on-disc wear tests. The samples were characterized using X-ray diffraction XRD, scanning electron microscopy SEM, energy-dispersive spectroscopy EDS, and optical microscopy. The depth and width of wear tracks were measured using a profilometer. Results indicated that increasing W content leads to a higher coefficient of friction, but the best wear performance was observed with W-containing coatings. The optimal combination was found to be the 1.8550 steel substrate paired with the FeCrBSi-W coating, which demonstrated a 5 higher coefficient of friction but a 47 lower specific wear rate compared to the non-W coating.

 Plazma Transfer Ark PTA kaplamaları, yüksek kaplama kalınlığı, düşük termal gerilim ve yüksek enerji yoğunluğu sağladıkları için metallerin yüzey modifikasyonunda yaygın olarak kullanılmaktadır. Bu teknik, cam ve seramik kalıplar, otomotiv valfleri, petrokimyasal kanatlar, lamine silindirler ve plastik ekstrüzyon kalıpları ve vidalarına uygulanmaktadır. Plastik enjeksiyon makinesi vidalarında yüksek sertlik ve aşınma direnci, dayanıklılık için kritik öneme sahiptir. Bu özelliklerin elde edilmesi için plastik enjeksiyon vidalarında kullanılan çeliklerin diş tepeleri önce PTA yöntemiyle sert dolgu kaplama ile kaplanır, ardından nitrürleme işlemi uygulanır. Bu çalışmada, plastik enjeksiyon vidaları üretiminde kullanılan 1.8550 ve 1.8519 çelikleri, nikel Ni esaslı ve tungsten W katkılı veya katkısız FeCrBSi tozları ile kaplanmıştır. Kaplanmış numunelerin tribolojik özellikleri bilye-disk aşınma testleriyle değerlendirilmiştir. Numuneler, X-ışını difraksiyonu XRD, taramalı elektron mikroskobu SEM, enerji dağılımlı spektroskopi EDS ve optik mikroskop analizleri ile karakterize edilmiştir. Aşınma izlerinin derinliği ve genişliği bir profilometre kullanılarak ölçülmüştür.Sonuçlar, artan W içeriğinin sürtünme katsayısını artırdığını, ancak en iyi aşınma performansının W içeren kaplamalarla elde edildiğini göstermiştir. En uygun kombinasyon, 5 daha yüksek sürtünme katsayısına rağmen 47 daha düşük spesifik aşınma oranı gösteren FeCrBSi-W kaplamalı 1.8550 çelik altlık olmuştur.

Makale detayları

MICROSTRUCTURAL AND TRIBOLOGICAL PROPERTIES OF NICKEL-BASED HARDFACING COATINGS APPLIED ON NITRIDING STEELS BY PLASMA TRANSFERRED ARC WELDING

Yazarlar:

Gökçe Mehmet Ay | Fatih Hayati Çakır | Abdullah Sert

Yayıncı:

Eskişehir Osmangazi University

Ana Başlıklar:

Malzeme Tasarım ve Davranışları

Dergi:

Eskişehir Osmangazi Üniversitesi Mühendislik ve Mimarlık Fakültesi Dergisi Vol.33 Issue 2, pp.1809-1818

Belge Tipi:

Makale

Yayın Tarihi:

8/2025

Belge Dili:

İngilizce

Document ID (Org No.):

2001356295

pISSN:

2630-5712

Surface Modification

Plasma Transferred Arc

Boron CarbideYüzey geliştirme

Plazma transfer ark

Bor karbür

Sayı

Makale detayları

MICROSTRUCTURAL AND TRIBOLOGICAL PROPERTIES OF NICKEL-BASED HARDFACING COATINGS APPLIED ON NITRIDING STEELS BY PLASMA TRANSFERRED ARC WELDING

Yazarlar: Gökçe Mehmet Ay | Fatih Hayati Çakır | Abdullah Sert

Yayıncı: Eskişehir Osmangazi University

Ana Başlıklar: Malzeme Tasarım ve Davranışları

Dergi: Eskişehir Osmangazi Üniversitesi Mühendislik ve Mimarlık Fakültesi Dergisi Vol.33 Issue 2, pp.1809-1818

Belge Tipi: Makale

Yayın Tarihi: 8/2025

Belge Dili: İngilizce

Document ID (Org No.): 2001356295

pISSN: 2630-5712

Surface Modification

Plasma Transferred Arc

Boron CarbideYüzey geliştirme

Plazma transfer ark

Bor karbür

Sayı

Yazarlar:

Gökçe Mehmet Ay | Fatih Hayati Çakır | Abdullah Sert

Yayıncı:

Eskişehir Osmangazi University

Ana Başlıklar:

Malzeme Tasarım ve Davranışları

Dergi:

Eskişehir Osmangazi Üniversitesi Mühendislik ve Mimarlık Fakültesi Dergisi Vol.33 Issue 2, pp.1809-1818

Belge Tipi:

Makale

Yayın Tarihi:

8/2025

Belge Dili:

İngilizce

Document ID (Org No.):

2001356295

pISSN:

2630-5712