MIG-MAG Kaynak Kontak Kılavuzlarında Cu-W Kompozit Sinterlerin Sürekli Tel Aşındırma Performansı için Kullanımı

Gaz altı kaynak yöntemi, endüstride en fazla kullanılan kaynak yöntemlerinden birisidir. Özellikle büyük hacimli kaynaklı imalat gerektiğinde, bu yöntem oldukca başarılı ve pratiktir. Kaynak torçlarının uç kısmında bulunan teli yönlendiren ama en önemlisi elektrik akım iletimini sağlayan kontak kılavuzlarının aşınması üretim süresinin uzatılması ve kalibrasyon süresinin en aza indirilmesini sağlayabilir. Bu çalışmada, Gazaltı Kaynak robotlarında kullanılan kontak kılavuzların en fazla aşınan kısmına toz metalürjisi yöntemiyle katkılı ve katkısız bakır tozlardan pim yapılarak montajı yapılmıştır. Elde edilen pim çakılmış kontak kılavuzların ile seri üretim şartlarında yapılarak aşınma performansı karşılaştırılmıştır. Çalışmada Cu and Cu+W tozları ile presleme ve sinterleme işlemi yapılmıştır. Kontak kılavuzların sertlikleri, mikro yapıları ve XRD sonuçları alınarak karakterize edilmiştir. CuW5 ve CuW10 toz karışımlarının daha başarılı olduğu görülmüştür.

Anahtar Kelimeler:

Toz Metalurjisi, Aşınma Dayanımı, MIG-MAG Kaynak Yöntemi, Kontak Kılavuzları

The Use of Cu-W Sinters in MIG-MAG Welding Contact Tips for Improved Continuous Wire Abrasion Performance

Gas metal arc welding is one of the most widely used welding methods in the industry. Especially when large volume welded manufacturing is required, this method is very successful and practical. The wear of the contact guides, which guide the wire at the tip of the welding torches, but most importantly, provide electrical current transmission, may cause the production time to be extended and the calibration period to be minimized. In this study, the most worn part of the contact guides used in the Gas Welding robots were assembled by making pins from doped and undoped copper powders using the powder metallurgy method. The wear performance was compared by making the obtained pin driven contact guides under mass production conditions. In the study, pressing and sintering processes were carried out with Cu and Cu+W powders. The hardness of the contact guides was characterized by their microstructure and XRD results. It was observed that CuW5 and CuW10 powder mixtures were more successful.

Keywords:

Powder Metallurgy, Abrasion Resistance, MIG-MAG Welding Method, Contact Nozzle,

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