Studies on the effects of deep cryogenic treated WC–Co insert on turning of Al6063 using multi-objective optimization

Abstract

To improve the machining performance manufacturers adopt various methods to improve the tool life which influences production cost and the degree of the surface finish. Recently cryogenic treatment is used to improve the machining performances. In the present work, the tungsten carbide-cobalt (WC-Co) cutting tool is cryogenically treated at − 196 °C for a soaking time of 24 h and tempered to 200 °C for 2 h. The machinability attributes such as Tool Wear Rate, Surface profile roughness (Ra), of the Cryo Treated (CT) cutting tool, are measured on turning operation with different parametric conditions on the Al6063 alloy and compared with an Untreated Tool (UT). The results show that the CT tool improves the tool life with an acceptable surface finish. Taguchi's coupled multi-objective optimization methods such as Grey Relational Analysis (TC-GRA) and Technique for Order Preference by Similarity to Ideal Solution (TC-TOPSIS) were actualized to enhance the turning performance of CT tool. The outcomes revealed that TC-TOPSIS acquired ideal condition is improving the exhibition than the TC-GRA. Furthermore, the interaction impact of cutting parameters is analyzed through 3D surface plots.

Evaluation of Methods for Superhard Material Processing to Ensure Wear Resistance of Finished Structures

“…Additionally, the microhardness of the WC-Co alloy also increases by approximately 5.7%. 20,29 In this work, cryoprocessing of the alloy for 16-24 h increased the material's mechanical properties (hardness and elasticity). It was also shown that waterjet treatment has a more negligible effect on the properties of the alloy after exposure to −192 °C for 24 h. In Fomin, 9 the titanium composite was processed thermally.…”

“…15 Solid materials are also used to create cutting, grinding, milling, or other tools for their processing. 9,17 The main methods of superhard material treatment include shot blasting, vibration hardening, 11 pulsed plasma processing, 18 laser processing, 19 heat treatment, 20 and others. All of them enhance the strength characteristics of finished structures, thus reducing fatigue failure.…”

Automatic Process by Turning and Single Roller Burnishing Process on 6063 Al Alloy: Optimization and Implementation

“…Various researchers have attempted to determine the effectiveness of the parameters affecting turning operations on CNC lathes. A surface roughness of 0.36 µmRa was obtained by the automatic turning of Al6063 alloy on CNC lathes using Takushi analysis [1] and the machining of aluminum alloy grades 6063 with tungsten carbide (WC+Co) insert by deep cryogenic treatment gives a surface roughness of 0.373 µmRa with optimal parameters [2]. They demonstrated the effectiveness of the parameters in turning Al6063.…”

“…2. This study was performed consisted of 3 main processes: the first is a rough turning process to remove the outer of the workpiece approximately -0.5 mm, the second is finished turning, in which the parameters have been studied in the previously achieved machining of aluminum alloy within 0.373 µmRa which can be applied in this finish turning of Al6063 [1][2]. The turning parameters are a spindle speed of 2500 RPM, feed rate of 0.5 mm/rev and depth of cut of 100 µm with cutting tool insert MITSUBISHI code TNMG160402L-2G NX2525.…”

Graph Theory and Matrix Approach for Machinability Enhancement of Cryogenic Treated Cobalt Bonded Tungsten Carbide Inserts

“…It is observed that DCT insert exhibits the better surface profile finish while machining of AISI 4340 steel compared to UT insert. Arunkarthikeyan et al [34][35][36][37] reported that cryo treated carbide tools will provide improved surface characteristics even at high-speed machining.…”