Enhancement in Tribological and Mechanical Properties of Cemented Tungsten Carbide Substrates using CVD-diamond Coatings

Najar, Kaleem Ahmad; Sheikh, Neyaz Ahmad; Shah, Mohd Abas

doi:10.24874/ti.2017.39.01.03

Cited by 16 publications

(7 citation statements)

References 21 publications

(23 reference statements)

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“…Regarding the coating of hard metal substrate materials, the specific pretreatment methods include chemical etching of the WC‐Co to reduce the subsurface cobalt content in the boundary zone. [ 23 ] Because cobalt accelerates graphite formation within the substrate–coating interface, reduces nucleation of diamond on the substrate surface, and influences crystal growth as well as layer adhesion, the chemically invasive measure is mandatory. [ 24 ] Nevertheless, the chemical material removal process weakens the surface of the substrate material, which has to be considered during tool manufacturing as well as its later application.…”

Section: Influences Of Cvd Diamond Coating Adhesionmentioning

confidence: 99%

Ex Situ Residual Stress Analysis of Chemical Vapor Deposited Diamond Coated Cutting Tools by Synchrotron X‐Ray Diffraction in Transmission Geometry

et al. 2021

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Section: Influences Of Cvd Diamond Coating Adhesionmentioning

confidence: 99%

Ex Situ Residual Stress Analysis of Chemical Vapor Deposited Diamond Coated Cutting Tools by Synchrotron X‐Ray Diffraction in Transmission Geometry

et al. 2021

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“…Diamond tool is widely used to machine hard and brittle materials, such as cemented carbide, engineering ceramics, glass, sapphire and stone, owing to its highest hardness, rigidity, good abrasion resistance, corrosion resistance and chemical stability among natural substances since the crystal structure of diamond is unique [1-3]. However, due to the limitation of diamond manufacturing technology, the size of single-grain diamond is small.…”

Section: Introductionmentioning

confidence: 99%

Laser power effects on properties of laser brazing diamond coating

Long

Liu

Dong

et al. 2020

Surface Engineering

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Effect of laser power on formation mechanism of laser brazing diamond coating has been investigated for the first time and its interface microstructure was also investigated. The BNi-2 alloy solder was utilized as braze material to fabricate brazing diamond coating on 65Mn steel substrate by using fiber laser. The laser spot was scanned at a steady speed 3 mm/s. With increase in laser power, BNi-2 alloy solder layer gradually melts and spreads fully until a laser power of 1.1 kW was reached. A further increase in laser power results in intense graphitization of the surface of the diamond grits and thermal damage. The breakage of diamond is observed when laser power is increased to 1.3 kW. Four steps are observed in laser brazing process: melting, gathering, fusing and spreading. The microstructure investigation indicates that both Cr 3 C 2 and B 4 C carbides are formed at the interface between diamond and BNi-2 alloy matrix.

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“…Obviously, cutting with a carbide tool will inevitably lead to tool wearing rapidly and severely. To our knowledge, diamond film has the advantages of high hardness, good wear resistance, low friction coefficient and thermal coefficient, which is an ideal choice for tool coating [6,7]. The shedding of the film is a problem that restricts the coating tool properties in the process of contact friction in mechanical processing.…”

Section: Introductionmentioning

confidence: 99%

Fabrication and performance of boron doped textured diamond coated tool

Chen

Xiang

Feng

et al. 2019

Surface Engineering

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Boron doped diamond (BDD) film is deposited on two types of texture cemented carbide inserts by hot filament vapour deposition (HFCVD) method. The surface morphology and composition of boron doped textured diamond (BDTD) film are characterized by scanning electron microscopy and Raman spectroscopy, respectively. And the influence of different texture shape parameters on adhesion strength and cutting performance of BDTD film tools are analysed by an indentation test and milling test, respectively. The results showed that the texture has a significant effect on grain growth and quality of the diamond film. In addition, texture can further enhance the adhesion strength of diamond film. The adhesion strength of BDTD film is better than that of BDD films. Concurrently, the boron doped groove textured diamond (BDGTD) film tool has longer tool life and a better cutting performance than the other three kinds of diamond film tools due to its suitable texture shapes.

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Enhancement in Tribological and Mechanical Properties of Cemented Tungsten Carbide Substrates using CVD-diamond Coatings

Abstract: A B S T R A C T An experimental investigation has been carried out to study the influence on the performance characteristics of a cutting tool material notably known as cemented tungsten carbide (WC-Co

Cited by 16 publications

References 21 publications

Ex Situ Residual Stress Analysis of Chemical Vapor Deposited Diamond Coated Cutting Tools by Synchrotron X‐Ray Diffraction in Transmission Geometry

Ex Situ Residual Stress Analysis of Chemical Vapor Deposited Diamond Coated Cutting Tools by Synchrotron X‐Ray Diffraction in Transmission Geometry

Laser power effects on properties of laser brazing diamond coating

Fabrication and performance of boron doped textured diamond coated tool

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