Performance evaluation of a new type of titanium nitride (TiN) coated twist drill.

(1996) Performance evaluation of a new type of titanium nitride (TiN) coated twist drill. Masters thesis, King Fahd University of Petroleum and Minerals.


Download (3MB) | Preview

Arabic Abstract


English Abstract

Titanium Nitride (TiN) coated tool materials have become increasingly popular in the metal cutting industry because of their improved resistance to the wear and friction. In this study the matching performance of a new type of Titanium Nitride (TiN) coated twist drill with an intermediate plasma nitrided layer was evaluated and compared to the performance of commercial TiN coated twist drills. The performance variables used include the drilling thrust force, torque, drill wear and hole surface roughness data, obtained from drilling experiments conducted on AISI 303 stainless steel workpiece material. The matched pair statistical testing method was introduced to quantitatively compare the relative performance of the two types of drills. Wear patterns on the flank face and the chisel edges obtained by using micro-PIXE (Particle Induced X-Ray Emission) technique were also analyzed. The experimentally coated drills showed better performance, as was observed from its relatively lower median values of torque, flank wear, and hole surface roughness compared to the commercial drills. The median values of the thrust force were found to be approximately equal for both types of drills. The PIXE results indicate that wear on the flankface of the new drill takes place by abrasion and wear on the flank face of the commercial drill takes place mainly by cracking and spalling of the TiN coat.

Item Type: Thesis (Masters)
Subjects: Mechanical
Department: College of Engineering and Physics > Mechanical Engineering
Committee Advisor: Shuaib, AbdelRahman N.
Committee Members: Duffuaa, Salih O. and Yilbas, Bekir S. and Nickel, J
Depositing User: Mr. Admin Admin
Date Deposited: 22 Jun 2008 14:00
Last Modified: 01 Nov 2019 13:58