High-Pressure Cooling in Finishing Turning of Haynes 282 Using Carbide Tools: Haynes 282 and Inconel 718 Comparison

• Published in: Metals (Basel ) Vol. 11; no. 12; p. 1916
• Main Authors: Díaz-Álvarez, Antonio, Díaz-Álvarez, José, Cantero, José Luis, Miguélez, María Henar
• Format: Journal Article
• Language: English
• Published: Basel MDPI AG 01.12.2021
• Subjects: Adhesive wear; carbide tool; Carbide tools; Cooling; Cutting fluids; Cutting parameters; Cutting speed; Cutting tools; Cutting wear; Finishing; finishing turning; Grain boundaries; Haynes 282; Heat; High pressure; High temperature; high-pressure cooling; Inconel 718; Lubricants & lubrication; Nickel alloys; Nickel base alloys; Solid lubricants; Superalloys; Surface roughness; Thermal conductivity; Thermal resistance; Tool life; Tool wear; Turning (machining); Work hardening
• ISSN: 2075-4701; 2075-4701
• DOI: 10.3390/met11121916

Despite the interest of industry in nickel-based superalloys and its main features (high temperatures resistance, hardness, low thermal conductivity, among others), even today they are still materials that are difficult to cut. Cutting tools withstand both high pressures and temperatures highly localized at the cutting area because of the elevated work hardening of the alloy and the problems for the cutting fluid to access the region, with the consequent strong tool wear. The use of cutting fluids at high pressures improves coolant access and heat removal. This paper analyzed the machining of Haynes 282 alloy by means of coated carbide tools under high-pressure cutting fluids at finishing conditions. Tests were developed at different cutting speeds and feeds quantifying the machining forces, surface roughness, tool wear, and tool life. Values of 45.9 min and Ra between 2 µm and 1 µm were obtained in this study for tool life and roughness, respectively, for the combination of cutting speed 50 m/min and feed 0.1 mm/rev. Likewise, a comparative analysis is included with the results obtained in previous works developed by the authors relating to the finishing turning of Haynes 282 and Inconel 718 under conventional pressure cooling. The comparative analysis with Inconel 718 is included in the study due to its importance within the nickel base superalloys being widely used in industry and widely analyzed in scientific literature.