Direct Diode Laser Surface Melting of Nodular Cast Iron

Abstract:

A nodular cast iron (NCI) has been surface melted using the high power direct diode laser (HPDDL) with a quasi-rectangular laser beam spot and the uniform distribution of power. The effect of a heat input and a shielding gas on the quality of surface melted layers (SMLs) has been investigated. The microstructure of the SMLs has been assessed by optical microscopy, scanning electron microscopy and X-ray diffraction (XRD). Comparative erosion tests between the SMLs and as-received NCI have been performed following the ASTM G 76 standard test method. The HPDD laser surface melting of the NCI enables to produce non-porous layers having a hardness up to 1000 HV. It has been determined that the hardness of SMLs depends on the amount of cementite and residual austenite in the fusion zone. The SMLs produced in an argon atmosphere contain higher volume fraction of austenite, than those produced in nitrogen, and consequently have the lower hardness. With increasing heat input the hardness increases, as the result of more complete dissolution of graphite and the higher amount of cementite. The SMLs exhibited significantly higher erosion resistance than the as-received NCI for erodent impact angle of 30°, and slightly lower at 90°.

• Periodical: Applied Mechanics and Materials (Volumes 809-810)
• Pages: 423-428
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.809-810.423
• Online since: November 2015
• Authors: Damian Janicki*
• Keywords: Ductile Cast Iron, Erosive Wear, High Power Direct Diode Laser, Laser Surface Melting, Nodular Cast Iron

References

[1] R. Elliott, Cast iron Technology, Butterworth-Heinemann Ltd, (1988).

[2] C.H. Chen, C.J. Alstetter, J.M. Rigsbee, Laser processing of cast iron for enhanced erosion resistance. Metall. Trans. 15A (1984) 719.

DOI: 10.1007/bf02644203

[3] J.H. Abbud. Microstructure and erosion resistance enhancement of nodular cast iron modified by tungsten inert gas. Materials and Design. 35 (2012) 677-684.

DOI: 10.1016/j.matdes.2011.09.029

[4] K.F. Alabeedi, J.H. Abboud, K.Y. Benyounis, Microstructure and erosion resistance enhancement of nodular cast iron by laser melting, Wear. 266 (2009) 925-933.

DOI: 10.1016/j.wear.2008.12.015

[5] M. Adamiak, J. Górka, T. Kik, Structure analysis of welded joints of wear resistant plate and constructional steel, Archives of Materials Science and Engineering. 56, 2 (2010) 108-114.

[6] A. Poteralski, M. Szczepanik, G. Dziatkiewicz, W. Kuś, T. Burczyński, Comparison between PSO and AIS on the basis of identification of material constants in piezoelectrics, , ICAISC 2013, Part II, LNAI 7895, Springer-Verlag Berlin Heidelberg, 2013, p.569.

DOI: 10.1007/978-3-642-38610-7_52

[7] R.C. Voigt, C.R. Lopper, A study of heat-affected zone structure in ductile cast iron. Welding Journal. 62 (1983) 82-88.

[8] A. Poteralski, M. Szczepanik, W. Beluch, T. Burczyński, Optimization of composite structures using bio-inspired methods, ICAISC 2014, Part II, LNAI 8468, Springer-Verlag Berlin Heidelberg, 2014, pp.397-406.

DOI: 10.1007/978-3-319-07176-3_34

[9] M. Burda, A. Gruszczyk, T. Kik, K. Kozioł, A. lÍkawa-Raus, Novel alloys for soldering carbon nanotubes fibers and other carbon based structures, in the proceedings of the 15th International Conference on Experimental Mechanics, Faculty of Engineering, University of Porto, 2015, 411-412.

[10] B. Szczucka-Lasota, B. Formanek, A. Hernas: Growth of corrosion products on thermally sprayed coatings with FeAl intermetallic phases in aggressive environments, Journal of Materials Processing Technology. 164 (2005) 930-934.

DOI: 10.1016/j.jmatprotec.2005.02.244

[11] R. Burdzik, Ł. Konieczny, Z. Stanik, P. Folega, A. Smalcerz, A. Lisiecki, Analysis of impact of chosen parameters on the wear of camshaft, Arch. Metall. Mater. 59, 3 (2014) 957-963.

DOI: 10.2478/amm-2014-0161

[12] D. Janicki, High power diode laser cladding of wear resistant metal matrix composite coatings, Solid State Phenomena. 199 (2013) 587-592.

DOI: 10.4028/www.scientific.net/ssp.199.587

[13] A. Lisiecki, Titanium Matrix Composite Ti/TiN Produced by Diode Laser Gas Nitriding, Metals. 5, 1 (2015) 54-69.

DOI: 10.3390/met5010054

[14] K. Labisz, E. Jonda, T. Tański, W. Borek, M. Czaja, High Power Diode Laser Application for Metals Surface Treatment Based on Wear Resistance Investigation. Advanced Materials Research. 1036 (2014) 482-489.

DOI: 10.4028/www.scientific.net/amr.1036.482

[15] M. Musztyfaga-Staszuk, L. A. Dobrzański, The use of laser technology to shape properties of the contacts of silicon solar cells and their structure, Central European Journal of Physics. 12. 12 (2014) 836-842.

DOI: 10.2478/s11534-014-0512-5