PRODUCTION OF Ni-HARD ALLOY POWDERS BY GAS ATOMIZATION

Year 2024, Volume: 8 Issue: 1, 124 - 129, 30.04.2024

Onur Muratal , Rıdvan Yamanoğlu , Can Duran , Yiğit Gönülalan , Yağız Akyıldız , Funda Gül Koç , Burak Barutçuoğlu

https://doi.org/10.46519/ij3dptdi.1402760

Abstract

Ni-Hard cast iron materials are frequently used in equipment where high wear resistance is required in industrial applications. Generally, Ni-Hard is produced by conventional casting techniques. In this study, it was aimed to produce Ni-Hard powders to produce Ni-Hard cast iron materials with additive manufacturing techniques. To produce spherical and fine raw materials for additive manufacturing techniques, the gas atomization technique with a close-coupled nozzle system was preferred for the production of Ni-Hard powders. Ni-Hard alloy was melted in a high-frequency 10kW induction furnace under a protective atmosphere integrated into the gas atomization system. During the atomization process, 150 °C superheating was applied to prevent the liquid metal from freezing and clogging the melt delivery tube. In terms of the continuity of the atomization process, the negative pressure (aspiration pressure) values formed at the end of the melt delivery tube at different gas pressures were measured. An aspiration pressure of -50 mbar was obtained under an atomization pressure of 35 bar. Particle size distributions, hall flow behaviour and angle of repose properties of the produced powders were determined. Finally, the characterization of the powders was carried out by scanning electron microscopy. It was determined that the powders obtained as a result of atomization exhibited a spherical morphology and a narrow size range. The Hall flow rate test result of Ni-Hard powders was measured as 22 seconds for 50 g.

Keywords

Gas Atomization, Additive Manufacturing, Ni-Hard, Powder Characterization

References

• 1. Çöl, M., Koç, F.G., Öktem, H., Kır, D., “The role of boron content in high alloy white cast iron (Ni-Hard 4) on microstructure, mechanical properties and wear resistance”, Wear, Vol. 348-349, Pages 158-165, 2016.
• 2. Anijdan, S.M., Bahrami, A., Varahram, N., Davami, P., “Effects of tungsten on erosion–corrosion behavior of high chromium white cast iron”, Materials Science and Engineering: A, Vol. 454, Pages 623-628, 2007.
• 3. Mohammadnezhad, M., Javaheri, V., Shamanian, M., Naseri, M., Bahrami, M., “Effects of vanadium addition on microstructure, mechanical properties and wear resistance of Ni-Hard4 white cast iron”, Materials & Design, Vol. 49, Pages 888-893, 2013.
• 4. Yamanoglu, R., Efendi, E., “Enhanced surface properties of iron by in situ hard nickel coating”, Materials Testing, Vol 58, Issue 2, Pages 151-154, 2016.
• 5. Ngqase, M., Pan, X., “An overview on types of white cast irons and high chromium white cast irons”, In Journal of Physics: Conference Series, Vol 1495, Issue 1, Pages 012023, 2020.
• 6. Chia, H.Y., Wu, J., Wang, X., Yan, W., “Process parameter optimization of metal additive manufacturing”, Journal of Materials Informatics, Vol. 2, Issue 4, Pages 16, 2022.
• 7. Furuya, K., Jitsukawa, S., Saito, T., “Application of the Sinter-HIP Method to Manufacture Cr–Mo–W–V–Co High-Speed Steel via Powder Metallurgy”, Materials, Vol. 15, Issue 6, 2300, 2022.
• 8. Rokni, M.R., Widener, C.A., Crawford, G.A., “Microstructural evolution of 7075 Al gas atomized powder and high-pressure cold sprayed deposition”, Surface and Coatings Technology, Vol. 251, Pages 254-263, 2014.
• 9. Yamanoğlu, R., “Atomizasyon teknikleri ile toz üretimi, sinterlenmesi ve karakterizasyonu”, Doctoral thesis, [Powder production, sintering and characterization by atomization techniques] [Thesis in Turkish], Kocaeli Üniversitesi, Kocaeli, 2001.
• 10. Wang, J., Xia, M., Wu, J., Ge, C., “Nozzle Clogging in Vacuum Induction Melting Gas Atomization: Influence of the Delivery-Tube and Nozzle Coupling”, Archives of Metallurgy and Materials, Vol. 67, Issue 4, Pages 1359-1370, 2022.
• 11. Muratal, O., “Gaz atomizasyonu ile kalay ve bakır esaslı metal tozlarının üretimi”, Yüksek Lisans Tezi, [Tin and copper based metal powder production by gas atomization] [Thesis in Turkish], Kocaeli Üniversitesi, Kocaeli, 2023.
• 12. Muratal, O., Yamanoğlu, R., Avcu, E., Gökalp, İ., Yavuz, H.İ., Gönülalan, Y., Kurban, M.E., Bayram, E., “Babit Tozunun Gaz Atomizasyonu ile Üretimi ve Saf Demirin Aşınma Özelliklerine Etkisi”, Pages 633-644, Bilgin Kültür Sanat Yayınları, Ankara, 2023.
• 13. Urionabarrenetxea, E., Avello, A., Rivas, A., Martín, J. M., “Experimental study of the influence of operational and geometric variables on the powders produced by close-coupled gas atomization”, Materials & Design, Vol. 199, 109441, 2021.
• 14. Barreto, E.S., Frey, M., Wegner, J., Jose, A., Neuber, N., Busch, R., Uhlenwinkel, V., “Properties of gas-atomized Cu-Ti-based metallic glass powders for additive manufacturing”, Materials & Design, Vol. 215, Pages 110519, 2022.
• 15. Qing, Y., Guo, K., Liu, C., Qin, Y., Zhan, Y., Shuo, S., Liu, C., “Impact of Atomization Pressure on the Particle Size of Nickel-Based Superalloy Powders by Numerical Simulation”, Materials, Vol. 15, Issue 9, Pages 3020, 2022.
• 16. Muratal, O., Yavuz, H.İ., Akyıldız, Y., Yüksel, O., Özdemir, Y., Yamanoğlu, R., “Babit alaşım tozlarının gaz atomizasyonu ile üretimi”, 1st International Conference on Innovative Academic Studies, Pages 1588-1592, Konya, 2022.
• 17. Zegzulka, J., Gelnar, D., Jezerska, L., Prokes, R., Rozbroj, J., “Characterization and flowability methods for metal powders”, Scientific reports, Vol. 10, Issue 1, Pages 21004, 2020.