Optimal Seeking Surface Roughness and Material Removal Rate Responses of Hardened AISI 4340 High Strength Low Alloy Steel in Dry Sustainable Environment

  • Amar ul Hassan Khawaja Department of Mechanical Engineering, University of Engineering and Technology, Taxila, Pakistan.
  • Mirza Jahanzaib Department of Mechanical Engineering, University of Engineering and Technology, Taxila, Pakistan.
  • Shahzad Zaka Department of Industrial Engineering, University of Engineering and Technology, Taxila, Pakistan.

Abstract

The aim of this research is to study the machinability aspects of hardened AISI 4340 High Strength Low Alloy (HSLA) steel (50 ± 2 HRC (Hardness Rockwell C)). The experimental investigation using coated carbide inserts is carried out during the dry hard milling process in a sustainable environment. The input parameters in the study are speed, feed rate and depth of cut and the responses are Average surface Roughness (Ra) and Material Removal Rate (MRR) that are selected through screening. Central Composite Design (CCD) in response surface methodology has been utilized as the experimental design technique with twenty experiments. Analysis of variance has been employed to examine the momentous machining parameters and responses. A mathematical model has been developed to optimize the surface roughness and material removal rate. It has been observed that the most significant factor for Ra is feed rate while for MRR depth of cut is the most significant factor. The results show that the minimum value of Ra ~ 0.098 µm is achieved at speed ~ 1000 RPM, feed rate ~ 300 mm/min and depth of cut ~ 0.2 mm while the maximum value of MRR ~ 6.35 cm3 /min is attained at feed rate ~ 500mm/min and depth of cut ~ 0.4 mm regarding less or no effect of speed ~ 500-1000 RPM. The average forecast error for the validation information has been observed to be 3.35%. for Ra and 3.2% for MRR. Further, it is investigated that good surface finish like grinding and dimensional accuracy can be achieved with coated carbide tools.

Published
Jan 1, 2021
How to Cite
KHAWAJA, Amar ul Hassan; JAHANZAIB, Mirza; ZAKA, Shahzad. Optimal Seeking Surface Roughness and Material Removal Rate Responses of Hardened AISI 4340 High Strength Low Alloy Steel in Dry Sustainable Environment. Mehran University Research Journal of Engineering and Technology, [S.l.], v. 40, n. 1, p. 116-129, jan. 2021. ISSN 2413-7219. Available at: <https://publications.muet.edu.pk/index.php/muetrj/article/view/1991>. Date accessed: 18 sep. 2021. doi: http://dx.doi.org/10.22581/muet1982.2101.11.
This is an open Access Article published by Mehran University of Engineering and Technolgy, Jamshoro under CCBY 4.0 International License