Tool life and wear mechanisms during Alloy 625 face milling

Nickel-based alloys, particularly Alloy 625, are very important materials which have been increasingly used in applications that require wear resistance, particularly in the oil and gas industries. One of their characteristics is low machinability, which is due to their combined properties of high-temperature hardness, mechanical strength, and corrosion and wear resistance. These properties mean that low cutting speeds are needed in order to increase tool life, although this is not always achieved. The main goal of this work is to evaluate different cemented carbide grades, cutting speeds, and feed per tooth rates, aiming to determine the best condition for face milling of nickel-based 625 superalloy. The tool life performance of the cutting tools and the wear mechanisms were analyzed based on the results of milling tests using a cutter with cemented carbide inserts. The main results indicate that tool wear mechanisms in the Alloy 625 milling are similar to those that occur in other nickel-based superalloys, such as 718 and 713. However, the wear rate is lower and there is evidence of occurrence of oxidation wear.

[1]  Mohd Amri Sulaiman,et al.  Wear mechanism and notch wear location prediction model in ball nose end milling of Inconel 718 , 2013 .

[2]  R. Komanduri,et al.  A review of the experimental techniques for the measurement of heat and temperatures generated in some manufacturing processes and tribology , 2001 .

[3]  Judith Gurney.  BP Statistical Review of World Energy , 1985 .

[4]  C. Ducros,et al.  Deposition, characterization and machining performance of multilayer PVD coatings on cemented carbide cutting tools , 2003 .

[5]  Keith Ridgway,et al.  Optimisation of tool life and productivity when end milling inconel 718TM , 2007 .

[6]  Stewart C. Black,et al.  11 – Turning and Milling , 1996 .

[7]  E. Ezugwu,et al.  An overview of the machinability of aeroengine alloys , 2003 .

[8]  Tool Wear Mechanisms during Machining of Alloy 625 , 2011 .

[9]  Kejia Zhuang,et al.  Modeling and analysis of coated tool temperature variation in dry milling of Inconel 718 turbine blade considering flank wear effect , 2014 .

[10]  M. Hanson,et al.  Corrosion behavior of NiCrMo Alloy 625 in high temperature, hydrogenated water , 2003 .

[11]  L. Shoemaker,et al.  ALLOYS 625 AND 725: TRENDS IN PROPERTIES AND APPLICATIONS , 2005 .

[12]  Helmi Attia,et al.  Wear mechanisms of WC coated and uncoated tools in finish turning of Inconel 718 , 2010 .

[13]  D. Capitanescu.  Alloy 625 Weld Overlays for Offshore and Onshore Projects , 1991 .

[14]  D. Dudzinski,et al.  Temperature variation in the workpiece and in the cutting tool when dry milling Inconel 718 , 2014 .

[15]  D. J. Tillack,et al.  The Invention and Definition of Alloy 625 , 1991 .

[16]  T. Kitagawa,et al.  Temperature and wear of cutting tools in high-speed machining of Inconel 718 and Ti6Al6V2Sn , 1997 .

[17]  T. Pollock,et al.  Nickel-Based Superalloys for Advanced Turbine Engines: Chemistry, Microstructure and Properties , 2006 .

[18]  Marek Balazinski,et al.  Improvement of Tool Life through Variable Feed Milling of Inconel 600 , 1995 .

[19]  David K. Aspinwall,et al.  Tool life when high speed ball nose end milling Inconel 718 , 2001 .

[20]  Emmanuel O. Ezugwu,et al.  Effect of high-pressure coolant supply when machining nickel-base, Inconel 718, alloy with coated carbide tools , 2004 .

[21]  P. C. Jindal,et al.  A new class of high performance PVD coatings for carbide cutting tools , 2001 .

[22]  Dahu Zhu,et al.  Tool wear characteristics in machining of nickel-based superalloys , 2013 .

[23]  Z. M. Wang,et al.  The machinability of nickel-based alloys: a review , 1999 .

[24]  Effect of Cutting Speed and Tool Coating on Machined Surface Integrity of Ni-based Super Alloy☆ , 2014 .