Study on Tool Life and Tool Wear of Coated Carbide Inserts When Turning Inconel 718 in Dry Machining  

Oleh:

Haron, Che Hassan Che ; Ibrahim, Gusri Akhyar ; Ghani, Jaharah Abdul ; Yazid, Mohd. Zaid Abu ; Yunn, Heng Shye

Jenis: Article from Proceeding
Dalam koleksi: APCOMS 2009: The 2nd Asia-Pacific Conference on Manufacturing System: Reconfigurable Manufacturing System for Facing Turbulent Manufacturing Environment, November 4th-5th, 2009, Yogyakarta, Indonesia, page II.15-23.
Topik: Inconel 718; PVD Inserts; Tool Life; Wear; Taguchi Method; Dry Machining
Fulltext: APCOMS G2-3.pdf (1.06MB)

Isi artikel

Inconel 718 has found its niche in many industries, owing to its unique properties such as high oxidation resistance, corrosion resistance even at very high temperatures and retains a high mechanical strength under these conditions as well. Inconel 718 material is widely used in as aircraft engine parts, chemical processing, pressure vessels, steam turbine power plants and etc. But due to peculiar characteristics such as lower thermal conductivity, work hardening, presence of abrasive carbide particles, hardness, affinity to react with tool material, makes it difficult to machine. Hence, it is classified as ‘‘Difficult-to-cut materials”. Therefore, performance of tool life for coated carbide tool during turning Inconel 718 in dry condition is study in order to increase the efficiency in turning process and reduce the machining cost. Coated carbide tool with thin layer of PVD TiAlN, CNMG 12 04 08-QM 1105 is use to turn Inconel 718 with hardness 20.25 HRC. Taguchi method with the orthogonal array L9 is use in this experiment with the parameter v=60,70,80m/min, f=0.2,0.25,0.3mm/rev and d=0.3,0.4,0.5mm. According to results, depth of cut is significant influence to the tool life, follow by the feed rate and cutting speed. Increment in depth of cut and feed rate will increase wear and shorten the tool life. v=60m/min, f=0.2mm/rev and d=0.3mm is the optimum parameter for tool life. Flank wear rate gradual increase in the initial machining and accelerate while wear rate achieve 0.1mm. Flank wears, crater wears, notch wear and nose wear are the wear occurs on the carbide tool during turning Inconel 718. Through the SEM, abrasion, attrition and adhesion are the wear mechanisms which can be seen on the cutting tool.

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