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

Öz

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.

Anahtar Kelimeler

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

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

Öz

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

Kaynakça

1. Adam G., Sievert T.A., Quinn T., Vigliotti P., Contact Tube Temperature during GMAW, Welding Journal, 37-41, 2001.
2. Chen P., Shen Q., Luo G., Wang C., Li M., Zhang L., Li X., Zhu B., Effect of Interface Modification by Cu Coating W Powders on the Microstructure Evolution and Properties Improvement for Cu-W Composites, Surface and Coatings Technology 288, 8-14, 2016.
3. Childs T.H.C., The Sliding Wear Mechanisms of Metals, Mainly Steels, Tribology International 13(6), 285-293, 1980.
4. Deshpande P.K., Lin R.Y., Wear Resistance of WC Particle Reinforced Copper Matrix Composites and the Effect of Porosity, Materials Science and Engineering: A 418(1-2), 137-145, 2006.
5. Deuis R.L., Subramanian C., Yellup J.M., Dry Sliding Wear of Aluminium Composites – A Review, Composite Science Technology 57(4), 415-435, 1997.
6. Dhokey N.B., Paretkar R.K., Study of Wear Mechanisms in Copper-Based SiCp (20% by volume) Reinforced Composite, Wear 265(1–2), 117-133, 2008.
7. Donghua D., Dongdong G., Thermal Behavior and Densification Mechanism during Selective Laser Melting of Copper Matrix Composites: Simulation and Experiments, Materials & Design 55, 482-491, 2014.
8. Dube R.K., Maji P., Bikramjit B., Enhancement of Wear Resistance Of Copper with Tungsten Addition (less than 20 wt. %) By Powder Metallurgy Route, Journal of Tribology 131(4), 1-9, 2009.

9. Durgutlu, A. and Gülenç, B., The Effect of Welding Speed on the Microstructure and Penetration in Arc Welding, Turkish Journal of Engineering and Environmental Sciences 23(4): 251-260, 1999.
10. Ezer M., Cam G., A Study on Microstructure and Mechanical Performance of Gas Metal Arc Welded AISI 304L Joints, Material Science and Engineering Technology 53(9): 1043-1052, 2022.
11. Gautam R.K., Ray S., Jain S.C., Sharma S.C., Tribological Behavior of Cu–Cr–SiCP in-situ Composite, Wear 265(5-6), 902-912, 2008.
12. Jamwal A., Mittal P., Agrawal R., Gupta S., Kumar D., Sadasivuni K.K., Gupta P., Towards Sustainable Copper Matrix Composites: Manufacturing Routes with Structural, Mechanical, Electrical and Corrosion Behaviour, Journal of Composite Materials 54(19), 2635-2649, 2020.
13. Kou S., Welding Metallurgy, Wiley International, Second Edition, 2002.
14. Lancaster J.F., The Physics of Welding, Pergamon Press, Second Edition, Oxford, pp. 204–234, 1986.
15. Ma G.C., Fan J.L., Gong H.R., Mechanical Behavior of Cu-W Interface Systems Upon Tensile Loading from Molecular Dynamics Simulations, Computational Materials Science 152, 165-168, 2018.
16. Selvakumar N., Vettivel S.C., Thermal, Electrical and Wear Behavior of Sintered Cu–W Nanocomposite, Materials and Design 46, 16-25, 2013.
17. Serindag H.T., Cam G., Multi-pass butt welding of thick AISI 316L plates by gas tungsten arc welding: Microstructural and mechanical characterization, International Journal of Pressure Vessels and Piping, 200, 104842, 2022.
18. Serindag H.T., Tardu C., Kircicek I.O, Cam G., A study on microstructural and mechanical properties of gas tungsten arc welded thick cryogenic 9% Ni alloy steel butt joint, CIRP Journal of Manufacturing Science and Technology, 37, 1-10, 2022.
19. Shimizu H., Yokota Y., Mizuno M., Kurokawa T., Wear Mechanism in Contact Tube, Science and Technology of Welding and Joining 11(1), 94-105, 2006.
20. Singla M., Singh L., Chawla V., Study of Wear Properties of Al–SiC Composites, Journal of Minerals Materials Characterization and Engineering 8(10), 813-819, 2009.
21. Tjong S.C., Lau K.C., Abrasive Wear Behaviour of TiB2 Particle Reinforced Copper Matrix Composites, Materials Science and Engineering: A 282(1-2), 183-186, 2000.
22. Yazar M., Kul M., Alp A.K., Talaş Ş., The use of NiAl Coating Deposited by ESD against the Wear of Sliding Wire in GMAW Contact Tips, Journal of Polytechnic 25(2), 739-744, 2022.
23. Zhang L., He X.B., Qu X.H., Duan B.H., Lu X., Qin M.L., Dry Sliding Wear Properties of High Volume Fraction SiCp/Cu Composites Produced by Pressure Less Infiltration, Wear 265 (11-12), 1848-1856, 2008.
24. Zou J., Song D., Shi H., Liang S., Effects of Grading Tungsten Powders on Properties of CuW Alloy, Materials Research Express 7(2): 026528, 2020.