Investigation and characterization of hardening of AISI 4140 steel using Nd:YAG laser

• Autorzy: Cinar O. , Mackan N. M. , Gulluoglu A. N.
• Języki publikacji: EN

Abstrakty

EN

Purpose: In this research, our aim was to propose an alternative to the conventional hardening methods, laser spot welding, thus laser hardening through the solid state reaction. Design/methodology/approach: Instead of diode lasers, the Neodymium:YAG Laser was used by applying different voltage, time and depths of laser and the parameters of hardening and the differences induced in the hardness’s of the specimens were investigated. Findings: The hardness of the specimens depending on the depths laser, from the edge to the deep of the specimens were measured. The metallographic examination (transformation due to the heating-cooling cycles) and the SEM analysis was made to complete the characterization. Research limitations/implications: Using Nd:YAG laser, the hardening process was easy to operate offering several advantages such as possibility of working in very small and narrow areas altering the voltage and depths of laser facilely and obtaining high hardness values due to transformation of microstructure without need of secondary quenchant. Originality/value: In this work, an alternative to the conventional hardening methods, laser spot welding was applied to AISI 4140 steel surface, which is widely used in the industry, thus laser hardening through the solid state reaction was achieved.

Słowa kluczowe

EN

laser spot welding; laser spot hardening; surface treatment; mechanical properties; AISI 4140 hardness

PL

spawanie laserowe punktowe; utwardzanie laserowe punktowe; obróbka powierzchni; właściwości mechaniczne; twardość AISI 4140

• Wydawca: International OCSCO World Press
• Czasopismo: Archives of Materials Science and Engineering
• Rocznik: 2014
• Tom: Vol. 65, nr 1
• Strony: 32--36
• Opis fizyczny: Bibliogr. 7 poz.

Twórcy

autor

Cinar O.

• Department of Metallurgical and Materials Engineering, Faculty of Engineering, Marmara University, Goztepe Campus, 34722, Kadikoy, Istanbul, Turkey

autor

Mackan N. M.

• Department of Metallurgical and Materials Engineering, Faculty of Engineering, Marmara University, Goztepe Campus, 34722, Kadikoy, Istanbul, Turkey

autor

Gulluoglu A. N.

• Department of Metallurgical and Materials Engineering, Faculty of Engineering, Marmara University, Goztepe Campus, 34722, Kadikoy, Istanbul, Turkey

Bibliografia

• [1] M.K.H Leung, H.C. Man, J.K. Yu, Theoretical and experimental studies on laser transformation hardening of steel by customized beam, International Journal of Heat and Mass Transfer 50 (2007) 4600- 4606.
• [2] J. Grum, T. Kek, The influence of different conditions of laser-beam interaction in laser surface hardening of steels, Thin Solid Films 453-454 (2004) 94-99.
• [3] J. Jiang, L. Xue, S. Wang, Discrete laser spot transformation hardening of AISI O1 tool steel using pulsed Nd:YAG laser, Surface and Coatings Technology 205 (2011) 5156-5164.
• [4] I.R. Pashby, S. Barnes, B.G. Bryden, Surface hardening of steel using a high power diode laser, Journal of Materials Processing Technology 139 (2003) 585-588.
• [5] R.S. Desai, S. Bag, Influence displacement constraints in thermochemical analysis of laser micro-spot welding process, Journal of Manufacturing Processes (in print).
• [6] Metallography and Microstructures, Volume 9, ASM Handbook, 5th Edition,1992.
• [7] Ö. Çınar, N.B. Maçkan, A.N. Güllüoğlu, Investigation and Characterization of Hardening of AISI 4140 Steel Using Nd:YAG Laser, Proceedings of the 15th International Materials Symposium, IMSP 2014, Denizli, Turkey (in print).