Laser treatment of dual matrix structured cast iron surface: Corrosion resistance of surface
Section snippets
Inroduction
Iron base composites are one of the important candidates for low cost composites with high wear and corrosion resistance [1]. The composite material with iron matrix and hard particle reinforcement has superior properties such as hardness, fracture toughness, and wear resistance. Depending on hard particle size, shape, and concentration, surface properties of the iron matrix composite changes [2] while limiting its practical applications. Iron based composites are generally formed from the
Experimental
The material used in the present study was dual matrix structured cast iron. The chemical composition of the material is shown in Table 1. To produce dual matrix structures (DMS) with different ausferrite volume fractions (AFVF), as cast specimens were intercritically austenitized at the dual phase region of 810 °C for 90 min and then rapidly transformed to a salt bath containing 50% KNO3+50% NaNO3 held at 315 °C and 375 °C for austempering for 120 min. The details of the heat treatment process are
Results and discussion
Laser controlled melting of dual matrix structured iron based alloy with the presence of 15% SiC particles at the surface was carried out. Morphological and metallurgical changes in the laser treated layer were examined using the analytical tools. The corrosion resistance of the laser treated surface was determined incorporating the electrodynamic tests.
Conclusion
Laser controlled melting of dual phase matrix cast iron was carried out. The dual matrix structures (DMS) with different ausferrite volume fractions (AFVF) were formed through intercritically austenitizing at the dual phase temperature region for 90 min and later austempering at 315 °C and 375 °C for 120 min. A carbon film containing 15% SiC particles and remaining 85% carbon was formed prior to the laser treatment process. A carbon film provided increased absorption of the incident laser beam and
Acknowledgments
The authors acknowledge the support of Dean of Scientific Research for funded Project (SF131-CES-12), King Fahd University of Petroleum and Minerals, Dhahran, Saudi Arabia for this work.
References (22)
- et al.
Laser gas assisted treatment of AISI H12 tool steel and corrosion properties
Opt Lasers Eng
(2014) - et al.
Effects of silicon content on the microstructure and corrosion behavior of Fe–Cr–C hardfacing alloys
J Alloys Compd
(2010) - et al.
Microstructure of high (45 wt%) chromium cast irons and their resistances to wear and corrosion
Wear
(2011) An investigation of the wear behaviours of white cast irons under different compositions
Mater Des
(2006)- et al.
Microwave versus conventional sintering: a review of fundamentals, advantages and applications
J Alloys Compd
(2010) - et al.
Corrosion electrochemical behavior of iron based composite layers obtained by laser sintering
Prot Metals Phys Chem Surf
(2011) - et al.
An Fe(CO)5-thermolysis-based process for the preparation of polymer and iron composite powders with high corrosion resistance
Eur J Inorg Chem
(2012) - et al.
Development of iron based brake friction material by hot powder preform forging technique used for medium to heavy duty applications
J Miner Mater Charact Eng
(2011) - et al.
Studies on compositionally graded silicon carbide dispersed composite surface on mild steel developed by laser surface cladding
J Mater Process Technol
(2008) - et al.
A comparative study of corrosion behavior of Al/SiCp composite with cast iron
Corrosion
(2001)
Microstructure of SiC particles reinforced Fe-based alloy composite coating
Trans Mater Heat Treat
Cited by (23)
Influence of laser parameters on graphite morphology in the bonding zone and process optimization in gray cast iron laser cladding
2019, Optics and Laser TechnologyEffect of rare earth oxide nano-additives on the corrosion behavior of Fe-based hardfacing alloys in acid, near-neutral and alkaline 3.5 wt.% NaCl solutions
2018, Applied Surface ScienceCitation Excerpt :The values of the equivalent circuit elements are shown in Table 7. The high Rct indicates that the hardfacing specimens have superior corrosion resistance[32,33]. The Rcts of the hardfacing specimens with nano-additives are higher than that of the hardfacing specimen without nano-additives.
Impact analysis of the thermal mechanical coupling characteristics of graphite morphologies during laser cladding of gray cast iron
2017, Optics and Laser TechnologyCitation Excerpt :On account of the inherent characteristics of cast iron materials, the local restoration cost is typically high, and most damaged equipment should be directly scrapped. Hence, laser cladding technology should be used to improve the surface properties of equipment and directly prolong its service time effectively [1], which have significant industrial application values. Laser cladding can strengthen equipment surfaces, such as large-scale box and revolving drum.
Effect of rare earth oxide nano-additives on micro-mechanical properties and erosion behavior of Fe-Cr-C-B hardfacing alloys
2017, Journal of Alloys and CompoundsCitation Excerpt :Rare earth oxides (oxides of Ce and La) increased volume fraction of carbide of Fe–Cr–C hardfacing coating [11]. Based on the present research, nano-particles containing rare earth oxides have given investigators a new idea to improve erosion resistance performance of high chromium cast iron hardfacing alloys regarding to their excellent properties [12,13]. In this paper, Fe-Cr-C-B hardfacing alloys with different content of rare earth oxide nano-additives were prepared on Q235 steel substrates by using arc welding.
Heat transfer enhancement of ammonia spray cooling by surface modification
2016, International Journal of Heat and Mass TransferCitation Excerpt :The ammonia spray cooling combined with enhanced surface can improve the critical heat flux significantly up to 910 W/cm2 [52], showing excellent heat removal capacity. Besides the extremely low temperature (or hash environment defined by Ohadi and Qi [55]), the surface for heat transfer will potentially face with corrosion, thus requiring corrosion-resistance treatment [56]. To date, the effect of surface corrosion on heat removal has rarely been reported.
Laser treatment of dual matrix cast iron with presence of WC particles at the surface: Influence of self-annealing on stress fields
2016, Optics and Laser TechnologyCitation Excerpt :Although laser surface treatment of alloys were studied previously [17,18], the main focus was to examine the surface morphology when hard particles were present and the microhardness in the laser treated layer. In addition, the corrosion resistance of the laser treated surface due to the presence of SiC particles is investigated in the previous study [19] and the mechanical properties including microhardness, residual stress, and friction coefficient of the surface were left for the future study. Thermal stress analysis and the residual stress formed at the treated surface of the dual matrix cast iron with presence of high concentration of WC were left for the future study.