Super-Hard DLC Coatings as an Alternative to Polycrystalline Diamond for Cutting Tools: Predictive Analysis of Aluminium Alloy Surface Quality

被引:6
|
作者
Ramirez, Giselle [1 ]
Gonzalez Castro, Jose M. [2 ]
Orrit-Prat, Jordi [1 ]
Bonet, Raul [1 ]
Cuadrado, Nuria [1 ]
Vilaseca, Montserrat [1 ]
Carreras, Lluis [3 ]
Caro, Jaume [1 ]
机构
[1] Ctr Tecnol Catalunya, Unit Metall & Ceram Mat, Eurecat, Placa Ciencia 2, Manresa 08243, Spain
[2] Ctr Tecnol Catalunya, Unit Appl Artificial Intelligence, Eurecat, Av Univ Autonoma 23, Cerdanyola Del Valles 08290, Spain
[3] Tratamientos Term Carreras SA, Passatge Engn Playa 38-42, Sabadell 08205, Spain
关键词
DLC coatings; PCD coatings; cathodic arc deposition; tool wear; tool vibrations; aluminium alloys; VIBRATIONS; ROUGHNESS; TRIBOLOGY;
D O I
10.3390/lubricants10070135
中图分类号
TH [机械、仪表工业];
学科分类号
0802 ;
摘要
The use of lightweight materials, such as ultra-high-strength aluminium alloys, is in high demand in the automotive and aerospace industries where weight savings are critical. The tool materials used for high-speed cutting of these aluminium alloys are subjected to severe conditions that promote premature failure of cutting tools. The application of polycrystalline diamond (PCD) coatings provides cutting tools with increased mechanical and thermal fatigue resistance and improved tribological performance. Despite these good properties, their high cost remains a major limitation in this sector. Super-hard Diamond-Like Carbon (DLC) coatings offer a technologically and economically feasible alternative to PCD-coated tools for cutting and machining non-ferrous materials. In this paper, the machining performance of coated and un-coated hard metal inserts in the turning of 7075 aluminium alloy has been explored. The surface quality of machined parts, the cutting tool wear resistance and the vibrations generated during turning of un-coated, PCD and super-hard thin DLC coatings on tungsten carbide inserts were compared. The results obtained demonstrate that DLC coatings are a potentially interesting alternative to PCD coatings for machining ultra-high-strength aluminium alloys, where surface component finish is a key factor.
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页数:11
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