Metallerin lazer katmanlı imalatında farklı proses parametrelerin etkisinin incelenmesi

Özgür Poyraz, Melih Cemal Kuşhan
904 206

Öz


Metal malzemelere yönelik olarak fonksiyonel parça üretimi amaçlı uygulamaları yaygınlaşan katmanlı imalat teknolojileri için araştırmalar artarak devam etmektedir. Söz konusu katmanlı imalat teknolojileri kullanılan malzeme formu, malzeme ekleme tekniği, enerji girdisi çeşidi ve proses konfigürasyonu gibi pek çok konuda farklılıklar göstermektedir. Bunlar arasından lazerle metal toz ergitme yöntemi, yeni malzeme çeşitleri açısından sunduğu esneklik, ince geometrik unsurların üretilebilmesi ve yüzey kalitesinin diğer yöntemlere kıyasla iyi olması sebebi ile farklı endüstriler tarafından tercih edilmektedir. Bununla beraber söz konusu yöntemin doğasından gelen hızlı ergime ve katılaşma süreçleri sebebi ile iç gerilmeler artmakta, deformasyonlar oluşmakta ve bu sebeple parça geometrisi veya malzemesine bağlı olarak hedeflenen kalitede üretimler elde edilememektedir. Bu zorlukların üstesinden gelmek ancak prosesin farklı parametreler açısından optimize edilmesi ile mümkün olmaktadır. Bununla beraber ilgili proseste yer alan onlarca farklı parametrenin etkisinin tek bir araştırmacı veya kurum tarafından anlaşılması, zaman ve maliyet açısından uygulanabilir değildir. Bu sebeple bu çalışmada literatürde geçen farklı araştırmalar sistematik olarak gözden geçirilmiş, proseste kullanılan parametreler açıklanmış, farklı durumlarda karşılaşılan zorluklara dikkat çekilmiş ve bu zorlukların üstesinden gelebilmek için proses parametrelerinde yapılan geliştirmeler ortaya konmuştur.


Anahtar kelimeler


Katmanlı imalat; lazerle metal toz ergitme; metalik malzemeler; proses parametreleri

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