Wear characteristics of nano-polycrystalline diamond tool in cutting of tungsten carbide

Face cutting of tungsten carbide was conducted using two monocrystalline diamond tools and three polycrystalline diamond tools to investigate the wear characteristics in terms of the crystal structure and composition of the diamond. It was found that the wear of the monocrystalline diamond tool depends on the crystal planes that form the rake face and flank face of the cutting tool, and a cleavage fracture occurs when the cutting force acts as a shear force on the (111) crystal plane. The binderless nano-polycrystalline diamond tool exhibits excellent wear resistance beyond those of the sintered polycrystalline diamond tool and chemical vapour deposition polycrystalline diamond tool, as well as better wear resistance than the monocrystalline diamond tool.

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Influence of Tungsten-Carbide and Cobalt on Tool Wear in Cutting of Cemented Carbides with Polycrystalline Diamond Tool

International Journal of Automation Technology ◽

10.20965/ijat.2013.p0433 ◽

2013 ◽

Vol 7 (4) ◽

pp. 433-438 ◽

Cited By ~ 6

Author(s):

Junsuke Fujiwara ◽

◽

Keisuke Wakao ◽

Takeshi Miyamoto ◽

Keyword(s):

Particle Size ◽

Tool Wear ◽

Tungsten Carbide ◽

Diamond Tool ◽

Polycrystalline Diamond ◽

Cemented Carbides ◽

Large Particles

The influence of the tungsten-carbide (WC) particle size and Co contents of cemented carbides on polycrystalline diamond tool wear during turning was investigated experimentally. The main results obtained were as follows. (1) Tool wear increased with increasing Co content. (2) It is important to cut off the binder between the WC particles and the Co. (3) Cemented carbides containing small WC particles are more effective than cemented carbides containing large particles.

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Face Turning of Cobalt-Free Tungsten Carbide Using Nano-Polycrystalline Diamond Tool

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1136.245 ◽

2016 ◽

Vol 1136 ◽

pp. 245-250

Author(s):

Akinori Yui ◽

Takayuki Kitajima ◽

Kenichiro Yoshitomi

Keyword(s):

Surface Roughness ◽

Tungsten Carbide ◽

Diamond Tool ◽

Brittle Materials ◽

Polycrystalline Diamond ◽

Zinc Dialkyldithiophosphate ◽

Micro Cutting ◽

Fluid Surface ◽

Hard And Brittle Materials ◽

Mold Life

The use of hard and brittle materials for manufacturing optical parts, such as dies and molds are required in order to extend mold life. Although, cobalt-free tungsten carbide is one of the hardest materials, micro-cutting is very difficult due to its hardness and its brittleness. This paper investigates face turning of cobalt-free tungsten carbide using a nanopolycrystalline diamond [NPD] tool and Zinc dialkyldithiophosphate (ZnDTP) fluid. Surface roughness of the cobalt-free tungsten carbide achieved was 22nmRz, which is far larger than the theoretical value. That is, traditional cutting theory does not directly apply for face turning of cobalt-free tungsten carbide using NPD tool and ZnDTP fluid.

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Wear characteristics of polycrystalline diamond tools in orthogonal cutting of CFRP/Ti stacks

Wear ◽

10.1016/j.wear.2016.11.038 ◽

2017 ◽

Vol 376-377 ◽

pp. 91-106 ◽

Cited By ~ 20

Author(s):

Jinyang Xu ◽

Mohamed El Mansori

Keyword(s):

Orthogonal Cutting ◽

Polycrystalline Diamond ◽

Wear Characteristics ◽

Diamond Tools

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Thermally induced defects in a polycrystalline diamond layer on a tungsten carbide substrate

Physica B Condensed Matter ◽

10.1016/j.physb.2009.09.036 ◽

2009 ◽

Vol 404 (22) ◽

pp. 4485-4488 ◽

Cited By ~ 8

Author(s):

B.N. Masina ◽

A. Forbes ◽

O.M. Ndwandwe ◽

G. Hearne ◽

B.W. Mwakikunga ◽

...

Keyword(s):

Tungsten Carbide ◽

Polycrystalline Diamond ◽

Thermally Induced ◽

Diamond Layer ◽

Induced Defects

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Comparison of microstructural features of diamond composite coatings with polycrystalline diamond or boron nitride brazed on tungsten carbide tools

Journal of Vacuum Science & Technology A Vacuum Surfaces and Films ◽

10.1116/1.580733 ◽

1997 ◽

Vol 15 (4) ◽

pp. 2262-2275 ◽

Cited By ~ 3

Author(s):

K. Jagannadham ◽

N. D. Fan ◽

R. Komanduri ◽

J. Narayan

Keyword(s):

Boron Nitride ◽

Tungsten Carbide ◽

Composite Coatings ◽

Polycrystalline Diamond ◽

Diamond Composite

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Small Holes Fabrication on Soda Glass by Self-Elastic Polycrystalline Diamond Tool

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.516.516 ◽

2012 ◽

Vol 516 ◽

pp. 516-521

Author(s):

Chung Chieh Cheng ◽

Dong Yea Sheu

Keyword(s):

Surface Roughness ◽

Diamond Tool ◽

Polycrystalline Diamond ◽

The Self ◽

High Quality ◽

Drilling Tool ◽

Drilling Tools ◽

Absorbing Materials ◽

New Type ◽

Small Holes

This study describes a novel process to drill small holes in brittle materials such as glass, silicon and ceramic using a self-elastic polycrystalline diamond (PCD) drilling tool. In order to improve the surface roughness and reduce crack of the small holes, a new type of self-elastic PCD drilling tool equipped with vibration absorbing materials inside the housing was developed to fabricate small holes in glass in this study. The self-elastic PCD drilling tools could absorb the mechanical force by the vibration absorbing materials while the PCD tool penetrates into the small holes. Compared to conventional PCD drilling tools, the experimental results show that high-quality small holes drilled in glass can be achieved with cracking as small as 0.02mm on the outlet surface using the self-elastic PCD drilling tool.

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A Truing Technique of Flattening Diamond Grains for Fabricating Microstructures with Fine Surfaces

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.389-390.350 ◽

2008 ◽

Vol 389-390 ◽

pp. 350-355

Author(s):

Takeshi Harada ◽

Takuya Semba

Keyword(s):

Surface Roughness ◽

Electrical Discharge ◽

Diamond Tool ◽

Electrical Discharge Machining ◽

Polycrystalline Diamond ◽

Mesh Size ◽

Diamond Disk ◽

Working Surface ◽

Work Material ◽

Tool Profile

A truing technique that can be used to shape the tip of an electroformed diamond tool into a hemisphere and flatten diamond grains on the tool working surface at the same level as the bond face was developed. A polycrystalline diamond disk whose top surface roughened by electrical discharge machining was partially flattened by grinding was used as a truer. Diamond grains on the tool working surface were successfully flattened along the hemispherical tool profile when the grains mesh size of #1000 was employed. In addition, a grinding test using glasslike carbon as a work material revealed that a surface roughness of less than 50 nm Rz could be obtained in both cases when moving the tool on contour and scanning paths.

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