316L PASLANMAZ ÇELİK TOZUNUN ARK İLE TEK ÇİZGİ ERGİTİLMESİNDE ELEKTROT MESAFESİNİN ETKİLERİNİN ARAŞTIRILMASI

Öz

Eklemeli imalat yöntemleri, karmaşık geometrilerin ve prototip numunelerin üretimindeki avantajları nedeniyle yaygın olarak araştırılmaktadır. Toz yatakta birleştirmede, uygun ısı kaynağı ve işlem parametrelerinin belirlenmesi tek çizgi katılaşma ile başlamaktadır. Bu çalışmada, lazer ve elektron ışınına alternatif olarak ark kullanılarak, 316L paslanmaz çelik tozunun tek çizgi ergitilebilirliği incelenmiştir. Ergitmeler 0,4 mm kalınlığındaki toz yatakta, 17, 22 ve 27 amper akım değerleri ile gerçekleştirilmiş; ilerleme hızları 1 ve 2 mm/s, elektrot mesafeleri ise 0,7 ve 1 mm olarak belirlenmiştir. Farklı parametre kombinasyonları ile yapılan deneylerde katılaşma geometrisi, ısıl etkilenmiş bölge ve mikroyapı detaylı olarak değerlendirilmiştir. Elde edilen sonuçlar, düşük akım ve yüksek ilerleme hızlarında çizgisel katılaşma kabiliyetinin azaldığını; yüksek akım ve düşük ilerleme hızlarında ise daha geniş ve homojen katılaşma bölgelerinin oluştuğunu göstermektedir. Elektrot mesafesindeki artışın enerji yoğunluğunu azaltarak katılaşma genişliği ve tabla nüfuziyetini düşürdüğü belirlenmiştir. Çalışma, ark kullanımının lazer ve elektron ışınına alternatif olarak uygulanabilirliğini ortaya koymakta ve işlem parametrelerinin optimizasyonu için önemli bulgular sunmaktadır.

Anahtar Kelimeler

• Eklemeli İmalat
• Ark
• Metal Tozu

Destekleyen Kurum

Kafkas Üniversitesi Bilimsel Araştırma Projeleri Koordinatörlüğü

Proje Numarası

2023-FM-40

Etik Beyan

Bu çalışma Kafkas Üniversitesi Bilimsel Araştırma Projeleri Koordinatörlüğü tarafından 2023-FM-40 nolu projesi ile desteklenmiştir.

Teşekkür

Bu çalışma Kafkas Üniversitesi Bilimsel Araştırma Projeleri Koordinatörlüğü tarafından 2023-FM-40 nolu projesi ile desteklenmiştir.

INVESTIGATION OF THE EFFECTS OF ELECTRODE DISTANCE ON SINGLE-TRACK MELTING OF 316L STAINLESS STEEL POWDER BY ARC

Öz

Additive manufacturing techniques are extensively studied nowadays because of their benefits in fabricating intricate geometries and prototype specimens. In powder bed fusion, the selection of the suitable heat source and process parameters initiates with single-line solidification. This study examined the single-line meltability of 316L stainless steel powder utilizing an arc as an alternative heat source to laser and electron beam methods. Melting was conducted on a 0,4 mm thick powder bed utilizing current values of 17, 22, and 27 amperes; travel speeds of 1 and 2 mm/s; and electrode distances of 0,7 and 1 mm. The experiments, performed with various parameter combinations, were assessed regarding solidification geometry, heat-affected zone, and microstructure. The findings indicated that linear solidification efficiency diminished at low current and elevated travel speeds, whereas broader and more uniform solidification areas were achieved at high current and reduced travel speeds. An increase in electrode distance was found to diminish energy density, resulting in a reduction of solidification width and substrate penetration. This study illustrates the viability of employing arc technology as a substitute for laser and electron beam methods in powder bed single-track melting, yielding significant insights for the optimization of process parameters.

Anahtar Kelimeler

• Additive Manufacturing
• Arc
• Metal Powder

Proje Numarası

2023-FM-40

Kaynakça

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