Abstract
In this paper laser surface hardening of martensitic stainless steel AISI 420 was conducted using a 1600 W semiconductor diode laser. Focal plane position, laser power and scanning speed were considered as process variables. Microhardness was measured in depth and surface of the hardened layer and metallography of samples were conducted in order to study the microstructure of the hardened zone. Macrography was also performed to measure the geometrical dimensions of hardened zone (width and depth). Microstructure evaluation was investigated through optical microscopy and field emission scanning electron microscopy. Microstructure observation of laser treated zone indicated that the higher surface hardness created the finer and more uniform martensitic phase. Results showed that by increasing the laser power and decreasing the focal plane position, depth of penetration and microhardness of hardened zone increased. By increasing the scanning speed and focal plane position, penetration depth decreased while width of hardened zone increased. Under desired conditions resulting from this research (laser power 1400 W, scanning speed 5 mm/s and focal plane position 65 mm), surface hardness of AISI 420 martensitic steel increased to 720 from 210 Vickers. The dimension of hardened layer was 1.2 mm in depth and 6.1 mm in width. Comparing the results with the furnace hardening heat treatment showed that the laser hardening process was more effective and precise than conventional processes.
Similar content being viewed by others
References
Kannatey Asibu E, Jr, Principles of Laser Materials Processing, John Wiley and Sons, New Jersey (2009), p 568.
Moradi M, Salimi N, Ghoreishi M, Abdollahi H, and Shamsborhan M, J Laser Appl 26 (2014) 022004.
Sundqvist J, Kaplan A F H, Granström J, and Sundin K G, J Laser Appl 27 (2015) 042002.
Moradi M, Ghoreishi M, Torkamany M, Sabbaghzadeh J, and Hamedi MJ, Adv Mat Res 383 (2012) 6247.
Faraji A H, Moradi M, Goodarzi M, Colucci P, and Maletta C, Opt Lasers Eng 96 (2017) 1.
khorram A, Jafari A, and Moradi M, Modares Mech Eng 17 (2017) 129.
Moradi M, Ghoreishi M, and Khorram A, Laser Eng 39 (2018) 379.
Moradi M, and Golchin E, Lat Am J Solids Struct 14 (2017) 464.
Moradi M, Mehrabi O, Azdast T, and Benyounis H Y, Opt Laser Technol 96 (2017) 208.
Li L, Opt Lasers Eng 34 (2000) 231.
Puli R, and Ram G D J, Surf Coat Technol 209 (2012) 1.
Mahmoudi B, Aghdam A R S, and Torkamany M J, JEST 8 (2010) 87.
Lo K H, Cheng F T, and Man H C, Surf Coat Technol 173 (2003) 96.
Kim J D, Lee M H, Lee S J, and Kang W J, Trans Nonferr Metal Soc 19 (2009) 941.
Soriano C, Leunda J, Lambarri J, Navas V G, and Sanz C, Appl Surf Sci 25 (2011) 7101.
Badkar D S, Pandey K S, and Buvanashekaran G, T Nonferr Metal Soc 20 (2010) 1078.
Li R, Jin Y, Li Z, and Qi K, J Mater Eng Perform 23 (2014) 3085.
Bien A, and Szkodo M, J Mater Process Tech 217 (2015) 114.
Telasang G, Majumdar J D, Padmanabham G, and Manna I, Surf Coat Technol 261 (2015) 69.
Pinahin I A, Chernigovskij V A, Bracihin A A, and Yagmurov M A, J Frict Wear 36 (2015) 330.
Babu P D, Buvanashekaran G, and Balasubramanian K R, T Can Soc Mech Eng 36 (2012) 241.
Moradi M, Karami Moghadam M, Zarei J, and Ganji B, Modares Mech Eng 17 (2017) 311.
Bojinovic M, Mole N, and Stok B, Surf Coat Technol 273 (2015) 60.
Cordovilla F, Garcia-Beltran A, Sancho P, Dominguez J, de-Lara L R, and Ocana J L, Mater Des 102 (2016) 225.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Moradi, M., Fallah, M.M. & Jamshidi Nasab, S. Experimental Study of Surface Hardening of AISI 420 Martensitic Stainless Steel Using High Power Diode Laser. Trans Indian Inst Met 71, 2043–2050 (2018). https://doi.org/10.1007/s12666-018-1338-4
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s12666-018-1338-4