Effect of Starting Microstructure on Material Removal Rate (MRR) of AISI 1045 Steel in (Die-Sinking) Electric Discharge Machining

Authors

  • M. R. Zafar Department of Industrial & Manufacturing Engineering, University of Engineering and Technology, Lahore, Pakistan
  • M. A. Mehmood Department of Industrial & Manufacturing Engineering, University of Engineering and Technology, Lahore, Pakistan
  • A. Inam Department of Metallurgy and Materials Engineering, College of Engineering and Emerging Technologies, University of the Punjab, Lahore
  • M. M. A. Bhutta Department of Mechanical Engineering, UET, Lahore
  • M. Ishtiaq Department of Metallurgy and Materials Engineering, College of Engineering and Emerging Technologies, University of the Punjab, Lahore

Keywords:

Electric discharge machining, machinability, microstructure, heat-treatment, material removal rate.

Abstract

Steels are important engineering materials and widely used in daily life. General properties of steel i.e. machinability, weldability and hardness etc. are strongly influenced by their chemical composition and microstructure. In conventional machining, machinability is directly influenced by nature of microstructure, while this study would investigate the machinability of various microstructures i.e. coarse ferrite-pearlite, fine ferrite-pearlite and martensite, of AISI 1045 for a non-conventional machining process, Electric Discharge Machining (EDM). The AISI 1045 steel was quenched, normalized and annealed to develop martensite, coarse ferrite-pearlite and fine ferrite-pearlite microstructures, respectively. Material Removal Rate (MRR) of these microstructures was studied for different values of current (5, 10, 15 A), voltage (30, 60, 90 V) and tool electrode diameters (8, 15 mm) in the Die-sinking EDM process.

The MRR results revealed that the starting microstructures marginally affect the MRR for various microstructures only at higher current intensities. MRR data for electrode tool diameter comparison showed that the smaller electrode tool diameter is more sensitive to microstructures as compared to larger electrode diameter.

Author Biographies

M. R. Zafar, Department of Industrial & Manufacturing Engineering, University of Engineering and Technology, Lahore, Pakistan

Lecturer, Department of Technology, University of the Lahore, Lahore, Pakistan

M. A. Mehmood, Department of Industrial & Manufacturing Engineering, University of Engineering and Technology, Lahore, Pakistan

Assitant Professor, Department of Industrial & Manufacturing Engineering, University of Engineering and Technology, Lahore, Pakistan

A. Inam, Department of Metallurgy and Materials Engineering, College of Engineering and Emerging Technologies, University of the Punjab, Lahore

Assistant Professir, Department of Metallurgy and Materials Engineering, College of Engineering and Emerging Technologies, University of the Punjab, Lahore

Additional Files

Published

2015-07-06

How to Cite

Zafar, M. R., Mehmood, M. A., Inam, A., Bhutta, M. M. A., & Ishtiaq, M. (2015). Effect of Starting Microstructure on Material Removal Rate (MRR) of AISI 1045 Steel in (Die-Sinking) Electric Discharge Machining. Journal of the Pakistan Institute of Chemical Engineers, 43(2), 75–84. Retrieved from http://piche.org.pk/journal/index.php/jpiche/article/view/251

Issue

Vol. 43 No. 2 (2015): Journal of the Pakistan Institute of Chemical Engineers

Section

Articles

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