Abstract
Inconel 718 is a kind of nickel-based alloys that are widely used in the aerospace and nuclear industry owing to their high temperature mechanical properties. Cutting of Inconel 718 in conventional cutting (CC) is a big challenge in modern industry. Few researches have been studied on cutting of Inconel 718 using single point diamond tool applying the UEVC method. This paper shows an experimental study on UEVC of Inconel 718 by using polycrystalline diamond (PCD) coated tools. Firstly, cutting tests have been carried out to study the effect of machining parameters in the UEVC in terms of surface finish and flank wear during machining of Inconel 718. The tests have clearly shown that the PCD coated tools in cutting of Inconel 718 by the UEVC have better performance at 0.1 mm depth of cut as compared to the lower 0.05 mm depth of cut and the higher 0.12 or 0.15 mm depth of cut. Secondly, like CC method, the cutting performance in UEVC increases with the decrease of the feed rate and cutting speed. The CC tests have also been carried out to compare performance of CC with UEVC method.
Highlights
As a typical nickel-based superalloy, Inconel 718 is widely used in the aerospace, gas turbine, and automobile industries for the high temperature strength and high corrosion resistance [1]
The comparisons of economic feasibility, machined surface finish, and flank wear in Ultrasonic elliptical vibration cutting (UEVC) and conventional cutting (CC) methods were made
According to the experimental findings above, some conclusions can be obtained as follows: (1) In the UEVC process, the polycrystalline diamond (PCD) coated tools used in cutting of Inconel 718 are able to obtain better performance at 0.1 mm depth of cut as compared to both the lower 0.05 mm depth of cut and the higher 0.12 mm depth of cut and 0.15 mm depth of cut
Summary
As a typical nickel-based superalloy, Inconel 718 is widely used in the aerospace, gas turbine, and automobile industries for the high temperature strength and high corrosion resistance [1]. Nickel alloy is difficult to cut due to rapid work hardening. Compared with the conventional cutting (CC) and ultrasonic vibration cutting, the UEVC have many advantages such as less cutting forces, longer tool life, and better surface finish [10, 11]. Suzuki and coworkers [12] cut a specially developed tungsten alloy with SCD tools in the ultraprecision UEVC method. Suzuki et al.’s research [13] carried out some ultraprecision microgrooving experiments on sintered WC using SCD tools to study the basic effects of UEVC on the ductile micromachining process. In Li and Zhang’s studies [14], they obtained surface roughness Ra of 0.08 μm on an aluminium alloy using PCD tools in the ultraprecision UEVC cutting experiments. The selected cutting parameters (cutting speed, feed rate, and depth of cut) in mentioned studies cannot be implemented in general lathes
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