Enhancement of Machinability of Inconel 718 in End Milling through Online Induction Heating of Workpiece

Abstract

Abstract. This paper presents the outcome of a study on heat assisted end milling of Inconel 718 using inducting heating technique conducted to enhance the machinability of the material. The heating temperature maintained below the phase transformation temperature was aimed at softening the top removable material layers. The experimental results of both conventional and heat assisted machining were compared. The machinability of Inconel 718 under these conditions was evaluated in terms of tool life, tool wear morphology and chatter. The advantages of Induction heating is demonstrated by an longer tool life and lower chatter. The study showed that preheated machining facilitates up to 80% increase of tool life over conventional machining conducted using TiAlN coated carbide inserts.

Performance Analysis in Ball Nose End Milling of Preheated Hstr Inconel 600 Alloy

“…The workpiece was heated in the induction furnace till it attained the temperature of 650°C. As the softening temperature of Inconel 600 is up to 900°C, therefore, the Inconel 600 plate was heated near to the softening temperature because the superalloy has excellent creep rupture strength up to 700°C [10]. After the milling operation, surface roughness Ra was measured using a portable tester (Mitutoyo make, model-Surf Test SJ 301) with cut off length of 0.8mm and an evaluation length of 4 mm.…”

“…Abrari et al [9] have conducted milling of aluminum by using two and four flute cutter to study effect of number of cutting flutes on the milling performance. Amin et al [10] have shown that preheated machining facilitates up to 80% increase in tool life over conventional machining conducted using TiAlN coated carbide inserts. Hossain et al [11] have investigated the effect of workpiece preheating with high frequency induction heating on improvement of machinability of Ti-6Al-4V during end milling using TiAlN coated PVD inserts.…”

Some pyrazole derivatives as corrosion inhibitors for carbon steel in hydrochloric acid solutions

“…The ions liable to exist in solution are the H + ions which are produced by displacement from the ligand molecule by metal ions. Thus, complex formation should take place through a covalent link construction between the metal ion and the oxygen atom of the amine group [30]. Hence, it can be concluded that the conductance of the titrated solution is mainly due to Fe +2 cation.…”