Paslanmaz millerin farklı akım türleriyle bor tozu kaplanmasının mekanik özelliklere etkisi
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Dosyalar
Tarih
2022
Yazarlar
Dergi Başlığı
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Cilt Başlığı
Yayıncı
Düzce Üniversitesi
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
Bor mineralleri metalürji sanayinden otomotiv sektörüne, kompozit malzeme üretiminden nükleer sanayiye kadar birçok alanda kullanılmaktadır. Özellikle metalürji alanında malzemelerin mekanik özelliklerini iyileştirmek amaçlı kullanılmaktadır. Metalik malzemelerin yüzeylerinde kaplama malzemesi olarak kullanılması sıklıkla karşılaşılan durumlardandır. Yüzey kaplama malzemesi olarak bor yüzeye fırın içeresinde borlama ısıl işlemi ile kaplanabildiği gibi kaynaklı birleştirmelerde ilave malzeme olarak da kaplanabilmektedir. Kaynaklı yöntemlerde, TİG, MİG-MAG, Plazma transfer ark kaynak ve lazer kaynak yöntemleri örnek olarak verilebilir. Bu çalışmada AISI 304 paslanmaz çelik mil malzeme üzerine Bor Karbür ve Bor Oksit tozu 3 farklı akım değerlerinde kaplanmıştır. Sinerjik pulse MİG kaynak yöntemi ile 60 mm uzunluğunda, 8 mm çapında paslanmaz çelik millerine 2 mm derinliğinde ve 7 mm çapında boşluklar açılmıştır. Tepe noktalarına açılan bu boşluklara bu tozlar eklenerek kaynaklı işlem gerçekleştirilmiştir. Açılan boşluklardan tozların uçmasını önlemek amacıyla tozlar saf alkolle macun kıvamına getirilip sürülmüştür. Tozlar ilave edildikten sonra mil üstlerine normal, tek ve double pulse olmak üzere kaynak işlemi gerçekleştirilmiştir. Kaynak işlemi sonucunda optik mikroskopla görüntüler çekilmiştir. Numunelere optik inceleme sonrasında mikro sertlik ölçümü işlemi uygulanmıştır. Kaplama ara yüzü incelemeleri neticesinde, kaynak dikişi ile paslanmaz mil malzemenin metalürjik olarak bağlandığı ve kaynak dikişinde dentritik yapılar olduğu görülmüştür. Kaynak dikişi mikro sertlikleri incelendiğinde double pulse akım ile yapılan kaplamanın, normal akım ve pulse akım ile yapılanlara göre daha sert olduğu tespit edilmiştir.
Boron minerals and their constituents are used in many fields from metallurgical industry to automotive industry, from composite material production to nuclear industry. Boron and boron minerals are especially used in the field of metallurgy to improve the mechanical properties of materials. For example, the use of metallic materials as a coating material on the surfaces is often encountered. Boron surface as surface coating material can be coated with boron heat treatment inside the furnace as well as additional material in welded joints. In welding methods, TIG, MIG-MAG, plasma transfer arc welding and laser welding methods can be given as examples. In this study, Boron Carbide and Boron Oxıde powder is coated on three different flow values on AISI 304 stainless steel shaft material. With the synergic pulse MIG welding method, the holes of 60 mm distance, 8 mm diameter stainless steel rod were drilled in 2 mm depth and 7 mm diameter. B4C and B2O3 powder was added to these cavities opening to the peaks and the welded process was carried out. In order to prevent the B4C and B2O3 dust from flying into the cavities opened, it was put into a paste with pure alcohol and applied. After the addition of powder, welding was performed on the shaft tops as normal, single and double pulse. Because of the welding process, optical microscope images were taken. Micro hardness measurement was applied to the samples after optical examination. As a result of the examination of the coating interface, it was seen that the welded seam and stainless shaft material were metallurgical bonded and the welded seam was dendritic structures. When welding micro stiffness was examined, it was determined that the coating with double pulse current was harder than the ones with normal current and pulse current.
Boron minerals and their constituents are used in many fields from metallurgical industry to automotive industry, from composite material production to nuclear industry. Boron and boron minerals are especially used in the field of metallurgy to improve the mechanical properties of materials. For example, the use of metallic materials as a coating material on the surfaces is often encountered. Boron surface as surface coating material can be coated with boron heat treatment inside the furnace as well as additional material in welded joints. In welding methods, TIG, MIG-MAG, plasma transfer arc welding and laser welding methods can be given as examples. In this study, Boron Carbide and Boron Oxıde powder is coated on three different flow values on AISI 304 stainless steel shaft material. With the synergic pulse MIG welding method, the holes of 60 mm distance, 8 mm diameter stainless steel rod were drilled in 2 mm depth and 7 mm diameter. B4C and B2O3 powder was added to these cavities opening to the peaks and the welded process was carried out. In order to prevent the B4C and B2O3 dust from flying into the cavities opened, it was put into a paste with pure alcohol and applied. After the addition of powder, welding was performed on the shaft tops as normal, single and double pulse. Because of the welding process, optical microscope images were taken. Micro hardness measurement was applied to the samples after optical examination. As a result of the examination of the coating interface, it was seen that the welded seam and stainless shaft material were metallurgical bonded and the welded seam was dendritic structures. When welding micro stiffness was examined, it was determined that the coating with double pulse current was harder than the ones with normal current and pulse current.
Açıklama
Anahtar Kelimeler
Makine Mühendisliği, Mechanical Engineering, Metalurji Mühendisliği, Metallurgical Engineering, Mühendislik Bilimleri, Engineering Sciences, Akım, Current, Bor karbür, Boron carbide, Bor oksit, Boron oxide, Kaynak makineleri, Welding machinery, MIG kaynağı, MIG welding, Paslanmaz çelik, Stainless steel
