Fourth, processing cases
Jet engine combustion chamber
| Material: Inconel 718 forged blank Hardness: 35HRC Surface: pre-machined Process: semi-finishing Material grade: CBN10 Blade model: TNGN110308E25-L1 Cutting speed: 350m/min Feed rate: 0.25mm/rev Cutting depth: 0.5mm Coolant: Yes Result CBN10=Processing time: 6 minutes Whisker toughened ceramic = 10 minutes | 
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External turning of the shaft
| Material: Inconel 718 forged blank Surface: pre-machined Process: semi-finishing Material grade: CBN10 Blade model: TNGA160408E25-L1 Cutting speed: 300m/min Feed rate: 0.10mm/rev Cutting depth: 0.5mm Coolant: Yes Result Tool life: 12 minutes | 
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Shaft of the shaft
Material: Inconel 718 forged blank Hardness: 35HRC
Material grade / blade: CBN10=LCGN1604M0-0400E25-LF
WC=LCMR1604M0-0400-MP,883 Cutting speed: CBN10=170m/min
WC=30m/min Feed amount: CBN10/WC=0.2mm/rev
Cutting depth: CBN10/WC=0.2mm Coolant: Yes
result Tool life: CBN10=12 minutes
WC=10 minutes CBN10 reduces cutting time by up to 85% and improves surface roughness
V. Conclusion In general, Inconel 718 is a difficult material to process, and the machining parameters need to be optimized for each part to maximize tool life. The micro-cracking of the cutting edge, rapid wear of the flank and groove wear are the most common problems in processing this material. Cutting edge grinding has a significant impact on tool life. Care should be taken when attempting to exceed the recommended depth of cut.
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