Characterization of Thick Hard Layers with Ni-Cr-B-Fe-Al Alloy Obtained by Laser Cladding
Abstract
To increase the resistance to wear and corrosion of the surface layers made from steel with 0.45% C, multilayer deposition was tested by injection of powder with chemical composition of 8.9% Cr, 4.5% Fe, 5.1% B, 2, 4% Al, 0.6% Al; the remaining Ni, was melted in the bath with a CO2 laser in continuous wave and coupled to a mass in coordinates x-y-z. To establish the optimum deposition condition, the layers made with different laser regimes were characterized by macro-and microstructural analysis, qualitative analysis of phase with the radiation difractometry X microhardness analysis and determination of hardness on the surface of the deposited layer. Thermal stability of the laser deposited layers and their abrasive wear behavior were monitored.
Downloads
References
[2]. H. Gedda – Laser surface cladding - a literature survey, Lulea University of Technology, Division of Materials Processing, iulie 2000, Suedia.
[3]. R. P. Martukanitz, S. S. Babu and J. M. Vitek - Development of Advanced Wear and Corrosion Resistant Systems through Laser Surface Alloying and Materials Simulation, Applied Research Laboratory, State College, PA 16804, Oak Ridge National Laboratory.
[4]. D. Salehi – Sensing and control of Nd:YAG laser cladding process, Ph. D. Thesis, Swinburne University of Technology, Melbourne, Australia, 2005.
[5]. D.T. Levcovici, R. Boiciuc, S.M. Levcovici, C. Gheorghieş – Laser cladding of M2 Steel on a steel substrate, The International Thermal Spray Conference and Exposition (ITSC 2006) May 15th-17th, 2006, Seattle, Washington, U.S.A, ASM Seattle 2006, Proceedings on CD, pp.1339-13446.
[6]. S. Levcovici, D.T. Levcovici, C. Gheorghieş, S. Boiciuc – Laser Cladding of Ni-Cr-B-Fe-Al Alloy on a Steel Support, The International Thermal Spray Conference and Exposition (ITSC 2006) May 15th–17th, 2006, Seattle, Washington, U.S.A, Proceedings on CD, pp.1339-1344.
[7]. S. Boiciuc., S. Levcovici, D.T. Levcovici – Structural modifications in laser cladding layers heating up at different temperatures, Metalurgia International, no. 8, 2007, p. 14-19, Editura Stiintifica F.M.R.Bucharest, Romania, ISSN 1582-2214.
[8]. S. Boiciuc, DT. Levcovici, S. Levcovici, C. Gheorghies - Researches regarding the thermal stability of laser cladded Ni-CrB-Fe-Al alloy, Revista de tehnologii neconventionale, 2007, Editura PIM, Iasi, ISSN 1454-3087.
[9]. S. Boiciuc., S. Levcovici, D.T. Levcovici, C Gheorghies - Characterisation of hard coatings obtained by laser cladding process, Metalurgia International 9/2008, ISSN 1582-2214 p. 32-39.
