Abstract

The aim of the Plasma Transferred Arc (PTA) hardfacing process is improving a technical surface locally with a dedicated material; Hardfacing became an issue of intense development related to wear resistant application. The hardfacing procedures can be differentiated by the intensity of mixture with the base body, which is usually increasing along with an increasing fusion efficiency rate. Nearly all kinds of weldable materials can be hardfaced and mostly all types of known wear resistant metals in combination can be used as hardfacing materials. The PTA hardfacing process has been widely employed due to several advantages such as higher volume of metal deposition rates and achieving very low dilution level. Heat input which influences dilution can be controlled by proper selection of PTA process parameters. In this study, an attempt has been made to analyze PTA hardfacing of IS: 2062 structural steel with Titanium Carbide (TiC). Experiments were conducted based on a fully replicable five-factor, five-level central composite rotatable design. Mathematical models were developed using response surface methodology to study the effects of PTA hardfacing process parameters such as welding current, welding speed ,powder feed rate, oscillation width and pre heat temperature on bead geometry parameters like penetration, reinforcement, bead width and dilution. Direct and interaction effects of PTA process parameters on bead geometry were analyzed. From mathematical model, the process parameters were optimized.

Keywords:

Design of Experiments (DOE), effects, optimization, PTA hardfacing,

References

1. Agustin, G., G.S. Hern�n, S.S. Estela and A.D.V. Luis, 2011. Effect of welding procedure on wear behavior of a modified martensitic tool steel hardfacing deposit. Mater. Des., 31(9): 4165-4173.
   
2. Amos Robert Jayachandrana, J. and N. Murugana, 2010. Investigation on the influence of surfacing process parameters over bead properties during stainless steel cladding. Mater. Manuf. Process., 27(1): 69-77.
   CrossRef    
3. Cochran, W.G and G.M. Cox, 1962. Experimental Design. Asia Publishing House, Bombay, India.
   
4. Davis, O.L., 1983. The Design and Analysis of Industrial Experiments. Longmoun, New York.
   
5. Davis, J.R. and Davis & Associates, 1993. Hardfacing, Weld Cladding and Dissimilar Metal Joining ASM Handbook: Welding, Brazing and Soldering. 10th Edn., ASM Metals Park, OH, 6: 699-823.
   
6. D' Oliveira, A.S.C.M., A.E. Yaedu and P.S.C.P. da Silva, 2002. Influence of dilution on microstructure and mechanical properties of cobalt-based alloy deposited by Plasma Transferred Arc Welding. Proceeding of the International Conference on Advanced Materials, Their Processes and Applications, Materials Week, Muchen.
   
7. Draugelats, U., et al., 1996. Weld Res. Abroad, 42(11): 39-41.
   
8. Harris, P. and B.L. Smith, 1983. Factorial technique for weld quality prediction. Metal Constr., 15(11): 661-666.
   
9. Jha, A.K., B.K. Prasad, R. Dasgupta and O.P. Modi, 1999. Influence of material characteristics on the abrasive wear response of some hard facing alloys. J. Mater. Eng. Perform., 8(2): 190-196.
   CrossRef    
10. Lugscheider, E., U. Morkramer and A. Ait-Mekideche, 1991. Advances in PTA surfacing. Proceeding of the 4th National Thermal Spray Conference, Pittsburgh, PA, USA.
    
11. Mohan, K. and N. Muragan, 2009. Effects of plasma transferred arc welding parameters on bead geometry in tungsten carbide hard facing. Int. J. Manuf. Sci. Prod., 10(3-4): 155-168.
    
12. Siva, K., et al., 2009. Studies on nickel based colmonoy overlays deposited on stainless steel 316L by plasma transferred arc welding. Int. J. Adv. Manuf. Technol., 41: 24-30.
    CrossRef    
13. Wolfgang, W.S., 2012. Trends for Hardfacing.
    Direct Link

Competing interests

The authors have no competing interests.

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