Finishing turning of Ni superalloy haynes 282

Abstract

Nickel-based superalloys are widely used in the aeronautical industry, especiallyin components requiring excellent corrosion resistance, enhanced thermal fatigue properties,and thermal stability. Haynes 282 is a nickel-based superalloy that was developed to improvethe low weldability, formability, and creep strength of other γ’-strengthened Ni superalloys. Despitethe industrial interest in Haynes 282, there is a lack of research that is focused on this alloy. Moreover,it is difficult to find studies dealing with the machinability of Haynes 282. Although Haynes 282 isconsidered an alloy with improved formability when compared with other nickel alloys, its machiningperformance should be analyzed. High pressure and temperature localized in the cutting zone,the abrasion generated by the hard carbides included in the material, and the tendency towardadhesion during machining are phenomena that generate extreme thermomechanical loading on thetool during the cutting process. Excessive wear results in reduced tool life, leading to frequent toolchange, low productivity, and a high consumption of energy; consequentially, there are increasedcosts. With regard to tool materials, cemented carbide tools are widely used in different applications,and carbide is a recommended cutting material for turning Haynes 282, for both finishing androughing operations. This work focuses on the finishing turning of Haynes 282 using coated carbidetools with conventional coolant. Machining forces, surface roughness, tool wear, and tool life werequantified for different cutting speeds and feeds.