Politeknik Dergisi 2147-9429 Gazi University 10.2339/politeknik.865736 Engineering Mühendislik Gazaltı Kaynak Kontak Uçlarında Kayar Tel Aşınmasına Karşı ESD ile Yığılan NiAl Kaplamaların Kullanımı The use of NiAl Coating Deposited by ESD Against the Wear of Sliding Wire in GMAW Contact Tips https://orcid.org/0000-0001-9927-3268 Yazar Mustafa R&D Center, Şahinkul Machine and Spare Parts Manuf. Ltd. Co., https://orcid.org/0000-0003-0732-9354 Kul Milat R&D Center, Şahinkul Machine and Spare Parts Manuf. Ltd. Co., Bursa,Turkey, https://orcid.org/0000-0002-4770-4123 Alp Ali Kemal R&D Center, Şahinkul Machine and Spare Parts Manuf. Ltd. Co., Bursa,Turkey https://orcid.org/0000-0002-4721-0844 Talaş Şükrü Afyon Kocatepe Üniversitesi 06 01 2022 25 2 739 744 01 20 2021 02 08 2021 Copyright © 1998, Journal of Polytechnic 1998 Journal of Polytechnic

The wear during the sliding of wire in Gas Metal Arc Welding (GMAW) causes the contact tips to be replaced after a certain number of hours of service. In order to reduce the wear, GMAW weld contact tips were coated by NiAl using ESD (Electro Spark Deposition) with 60V and 500 Hz under Argon. The testing of contact tips were done on robotic GMAW stations and standard metallographic techniques and SEM microscopy were used to reveal the microstructure. The results indicate that the service life of contact tips can be extended as much as 50 % compared to uncoated contact tips in concern via the use of NiAl coating, affecting the wire friction wear performance during high temperature welding process.

The wear during the sliding of wire in GMA welds causes the contact tips to be replaced after a certain number of hours of service. In order to reduce the wear, GMAW weld contact tips were coated by NiAl using ESD (Electro Spark Deposition) with 60V and 500 Hz under Argon. The testing of contact tips were done on robotic GMAW stations and standard metallographic techniques and SEM microscopy were used to reveal the microstructure. The results indicate that the service life of contact tips can be extended as much as 50 % compared to uncoated contact tips in concern via the use of W and NiAl coating, affecting the wire friction wear performance during high temperature welding process

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