Grinding of Austempered Ductile Iron Grade 3 as Function of the Microcrystalline Al₂O₃ Grinding Wheels Composition

Abstract:

The conventional grinding wheels employment is an economically viable alternative on Austempered ductile iron (ADI) grinding. The machining of this iron is in most cases performed with superabrasive grinding wheels, requiring machine tools with higher costs. The ADI grinding with conventional grinding wheels can produce work results comparable to the superabrasive grinding wheels, followed by lower costs and flexibility in profile grinding, since these wheels can be easily re-profiled. The aim of this work is to verify the work results of grinding ADI Grade 3 employing conventional grinding wheels. The approach is based on the influence evaluation of different abrasive microcrystalline Al₂O₃ percentage in these tools on the force results and roughness values in the ADI grinding. The findings show a correlation between the grinding forces and the microcrystalline abrasive percentage of microcrystalline Al₂O₃, since lower forces were demanded for wheels with higher percentages. Regarding the surface parameters, there was a decrease in roughness values by employing less percentages. The originality of this research is reflected in the fact that it is the first time that the influence of the composition of conventional grinding wheels is investigated on ADI Grade 3 grinding. The results present in this research will contribute to the most appropriate conventional grinding wheel specification for the ADI Grade 3 grinding.

• Periodical: Advanced Materials Research (Volume 1105)
• Pages: 164-171
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1105.164
• Online since: May 2015
• Authors: Lucas Benini*, Walter Lindolfo Weingaertner, Eckart Uhlmann
• Keywords: Austempered Ductile Iron, Conventional Grinding Wheels, Forces, Microcrystalline Abrasives, Roughness

References

[1] J. Yang and S. K. Putatunda: Effect of microstructure on abrasion wear behavior of austempered ductile cast iron (ADI) processed by a novel two-step austempering process, Materials Science and Engineering A, Vol. 406 (2005), p.217.

DOI: 10.1016/j.msea.2005.06.036

[2] F. Klocke, C. Klöpper, D. Lung and C. Essig: Fundamental Wear Mechanisms when Machining Austempered Ductile Iron (ADI), Annals of the CIRP, Vol. 56-1 (2007), p.73.

DOI: 10.1016/j.cirp.2007.05.020

[3] M. C. Cakir and Y. Isik: Investigating the machinability of austempered ductile irons having different austempering temperatures and times, Materials and Design, Vol. 29 (2008), p.937.

DOI: 10.1016/j.matdes.2007.04.002

[4] K. N. Murthy, P. Sampathkumaran and S. Seetharamu: Abrasion and erosion behavior of manganese alloyed permanent moulded austempered ductile iron, Wear, Vol. 267 (2009), p.1393.

DOI: 10.1016/j.wear.2008.12.033

[5] R. Martins, J. Seabra and L. Magalhães: Austempered ductile iron (ADI) gears: Power loss, pitting and micropitting, Wear, Vol. 264 (2008), p.838.

DOI: 10.1016/j.wear.2007.05.007

[6] J. R. Keough: Section IV - Austempered Ductile Iron. Information on http: /www. ductile. org/didata/Section4/4intro. htm#Machinability (08. 25. 2014).

[7] A. E. Diniz, F. C. Marcondes and N. L. Coppini, in: Tecnologia da Usinagem dos Materiais, edited by Artliber Editora, 2 ed. (2000), in press.

[8] U. Seker and H. Hasirci: Evaluation of machinability of austempered ductile irons in terms of cutting forces and surface quality, Journal of Materials Processing Technology, Vol. 173 (2006), p.260.

DOI: 10.1016/j.jmatprotec.2005.05.058

[9] B. Avishan, S. Yazdani and D. J. Vahid: The influence of depth of cut on the machinability of an alloyed austempered ductile iron, Materials Science and Engineering A, Vol. 523 (2009), p.93.

DOI: 10.1016/j.msea.2009.05.044

[10] A. Akdemir, S. Yazman, H. Saglam and M. Uyaner: The Effects of Cutting Speed and Depth of Cut on Machinability Characteristics of Austempered Ductile Iron, Journal of Manufacturing Science and Engineering, Vol. 134 (2012), p.9.

DOI: 10.1115/1.4005805

[11] A. K. Das, R. K. Panda, J. P. Dhal, S. C. Mishra and S. Sen: Variation of mechanical properties of austempered ductile iron with processing parameters, International Journal of Current Research Vol. 4-8 (2012), p.12.

[12] M.J. Jackson: Grinding technology and new grinding wheels, Machining, Springer (2008), p.249.

[13] ASTM A897M - 06: Standard Specification for Austempered Ductile Iron Castings, Vol. 01-02 (2011).

[14] I. D. Marinescu et al., in: Handbook of Machining with Grinding Wheels, edited by CRC Press, Boca Raton (2007), in press.