Influence of Surface Finishing Operations on Reciprocating Sliding Friction and Wear Response of WC Based Cemented Carbides

2009 ◽  
Author(s):  
K. Bonny ◽  
P. De Baets ◽  
Y. Perez ◽  
S. Van Autre`ve ◽  
J. Van Wittenberghe ◽  
...  
Keyword(s):  
Friction And Wear ◽  
Sliding Friction ◽  
Surface Finishing ◽  
Cemented Carbides ◽  
Wear Volume ◽  
Wire Edm ◽  
X Ray Diffraction ◽  
X Ray ◽  
Wear Response ◽  
Sliding Distance

From comparative dry sliding pin-on-plate experiments on distinctive WC-Co and WC-Ni cemented carbides, machined by grinding or wire-EDM, correlations are derived between wear rate, wear volume and coefficient of friction and contact load, sliding distance, microstructure and surface finish condition. The EDM induced surface modification turns out to deteriorate wear resistance, especially during the wear-in stage of sliding. These findings are in agreement with X-ray diffraction measurements of the residual stress level in the WC phase.

scholarly journals Influence of Surface Finishing and Binder Phase on Friction and Wear of WC Based Hardmetals

2007 ◽  
Vol 561-565 ◽  
pp. 2403-2406 ◽  
Author(s):  
Koenraad Bonny ◽  
Patrick de Baets ◽  
Omer Van der Biest ◽  
Jef Vleugels ◽  
Bert Lauwers
Keyword(s):  
Friction And Wear ◽  
Surface Finishing ◽  
Cemented Carbides ◽  
Wear Volume ◽  
Binder Phase ◽  
Well Test ◽  
Wear Performance ◽  
The One ◽  
Sliding Distance ◽  
Nickel Binder

At present, cobalt is the most commonly used binder material in tungsten carbide based hardmetals. Current research on sliding wear performance of these cemented carbides, however, reveals promising results for nickel binder as well. Test samples of WC-Co and WC-Ni hardmetals have been machined and surface finished by wire-EDM and grinding. From comparative dry sliding pin-on-plate experiments on wire-EDM’ed, ground and polished grades, correlations are derived between wear volume loss and friction on the one hand and contact pressure, sliding distance, binder phase and microstructure on the other hand. The lowest wear levels are encountered with polished cemented carbides. The EDM induced surface modification turns out to deteriorate wear resistance, especially during the running-in stage of sliding. These findings are in agreement with Xray diffraction measurements of the residual stress level in the WC phase.

Impact of Cr3C2/VC addition on the dry sliding friction and wear response of WC–Co cemented carbides

Wear ◽  
2009 ◽  
Vol 267 (9-10) ◽  
pp. 1642-1652 ◽  
Author(s):  
K. Bonny ◽  
P. De Baets ◽  
J. Vleugels ◽  
S. Huang ◽  
O. Van der Biest ◽  
...  
Keyword(s):  
Friction And Wear ◽  
Sliding Friction ◽  
Cemented Carbides ◽  
Dry Sliding ◽  
Dry Sliding Friction ◽  
Wear Response

scholarly journals Dry sliding friction and wear response of WC-Co hardmetal pairs in linearly reciprocating and rotating contact

2011 ◽  
Vol 2 (1) ◽  
pp. 12-18
Author(s):  
Yeczain Perez Delgado ◽  
Koen Bonny ◽  
Patrick De Baets ◽  
Patric Daniel Neis ◽  
Vanessa Rodriguez Fereira ◽  
...  
Keyword(s):  
Friction And Wear ◽  
Room Temperature ◽  
Sliding Friction ◽  
Wire Edm ◽  
Wear Properties ◽  
Normal Contact ◽  
Contact Loads ◽  
Friction And Wear Properties ◽  
Wear Response ◽  
Contact Pressures

This paper presents an experimental evaluation of friction and wear properties of WC-Cocemented carbides. A comparison is made between unlubricated rotating and linearly reciprocating pin-onplate sliding pairs. The plate specimens were WC-10wt%Co grades surface finished by polishing orsequential wire-EDM steps, whereas WC-6wt%Co pins were used as counter body. The tests were carriedout at room temperature using a sliding speed of 0.30m/s and mean Hertzain contact pressures of 1.76 and2.08 GPa, i.e., normal contact loads of 15N and 25N, respectively. The worn surfaces on plate sampleswere quantified in terms of 2–D wear profiles obtained by means of surface topography scanningequipment. Wear mechanisms such as polishing and abrasion were identified using optical microscopy.Inferior tribological characteristics for wire-EDM surface finish compared to polishing were found. Higherfriction coefficient and wear levels were measured in unidirectional rotating sliding experiments comparedto linearly reciprocating test conditions.

Dry Reciprocating Sliding Friction and Wear Response of WC–Ni Cemented Carbides

2008 ◽  
Vol 31 (3) ◽  
pp. 199-209 ◽  
Author(s):  
K. Bonny ◽  
P. De Baets ◽  
J. Vleugels ◽  
S. Huang ◽  
B. Lauwers
Keyword(s):  
Friction And Wear ◽  
Sliding Friction ◽  
Cemented Carbides ◽  
Reciprocating Sliding ◽  
Wear Response

Tribological Behavior of Mesophase Carbon Added with Titanium and Copper

2011 ◽  
Vol 80-81 ◽  
pp. 60-63
Author(s):  
Xue Qing Yue ◽  
Hua Wang ◽  
Shu Ying Wang
Keyword(s):  
Wear Resistance ◽  
High Temperature ◽  
Friction Coefficient ◽  
Ball Mill ◽  
Friction And Wear ◽  
Applied Load ◽  
Tribological Behavior ◽  
Metallic Elements ◽  
X Ray Diffraction ◽  
X Ray

Incorporation of metallic elements, titanium and copper, into carbonaceous mesophase (CM) was performed through mechanical alloying in a ball mill apparatus. The structures of the raw CM as well as the Ti/Cu-added CM were characterized by X-ray diffraction. The tribological behavior of the Ti/Cu-added CM used as lubricating additives was investigated by using a high temperature friction and wear tester. The results show that, compared with the raw CM, the Ti/Cu-added CM exhibits a drop in the crystallinity and a transition to the amorphous. The Ti/Cu-added CM used as lubricating additive displays an obvious high temperature anti-friction and wear resistance effect, and the lager the applied load, the lower the friction coefficient and the wear severity.

The Structure and Electrical Property of sp2 Rich Carbon Films by Magnetron Sputtering

2014 ◽  
Vol 998-999 ◽  
pp. 120-123
Author(s):  
Jun Du ◽  
Xiao Ying Zhu ◽  
Yan Zang ◽  
Lei Guo
Keyword(s):  
Electrical Resistivity ◽  
Magnetron Sputtering ◽  
Carbon Films ◽  
Wear Volume ◽  
Chemical Bonds ◽  
Micro Hardness ◽  
X Ray Diffraction ◽  
Sputtering Deposition ◽  
X Ray ◽  
Pin On Disk

sp2 rich carbon films were produced by using magnetron sputtering deposition. The hardness, friction coefficient and wear volume were elevated by Knoop micro-hardness and pin-on-disk tester; The composition and microstructure of the carbon films have been characterized in detail by combining the techniques of Rutherford Backscattering Spectrum (RBS), X-Ray Photoelectron Spectrum (XPS) and X-Ray Diffraction (XRD); the electrical resistivity was measured by Four Probe Methods (FPM). It is found that: the films hardness are 11~17GPa (HK0.05), the friction coefficients are 0.1-0.2, the wear rate is 10-15m3/Nm; The maximum intensity position in the C1s indicates the chemical bonds are mainly sp2; the electrical resistivity is 1~2×10-4Ω·m. XRD proves these carbon films are amorphous.

Tribological Performance Optimization of Electroless Nickel Coatings Under Lubricated Condition

2018 ◽  
pp. 250-280 ◽  
Author(s):  
Santanu Duari ◽  
Arkadeb Mukhopadhyay ◽  
Tapan Kumar Barman ◽  
Prasanta Sahoo
Keyword(s):  
Performance Optimization ◽  
Friction And Wear ◽  
Electroless Nickel ◽  
Heat Treating ◽  
Wear Depth ◽  
X Ray Diffraction ◽  
X Ray ◽  
Heat Treated ◽  
Electroless Ni ◽  
Scanning Electron

The present chapter aims to determine optimal tribo-testing condition for minimum coefficient of friction and wear depth of electroless Ni-P, Ni-P-W and Ni-P-Cu coatings under lubrication using grey relational analysis. Electroless Ni-P, Ni-P-W and Ni-P-Cu coatings are deposited on AISI 1040 steel substrates. They are heat treated at suitable temperatures to improve their hardness. Coating characterization is done using scanning electron microscope, energy dispersive X-Ray analysis and X-Ray diffraction techniques. Typical nodulated surface morphology is observed in the scanning electron micrographs of all the three coatings. Phase transformation on heat treating the deposits is captured through the use of X-Ray diffraction technique. Vicker's microhardness of the coatings in their as-deposited and heat treated condition is determined. Ni-P-W coatings are seen to exhibit the highest microhardness. Friction and wear tests under lubricated condition are carried out following Taguchi's experimental design principle. Finally, the predominating wear mechanism of the coatings is discussed.

scholarly journals Friction and Wear Characteristics of 18Ni(300) Maraging Steel under High-Speed Dry Sliding Conditions

Materials ◽  
2020 ◽  
Vol 13 (7) ◽  
pp. 1485
Author(s):  
Kun Sun ◽  
Weixiang Peng ◽  
Binghui Wei ◽  
Longlong Yang ◽  
Liang Fang
Keyword(s):  
Maraging Steel ◽  
High Speed ◽  
Friction And Wear ◽  
Adhesive Wear ◽  
Dry Sliding ◽  
X Ray Diffraction ◽  
X Ray ◽  
Friction And Wear Characteristics ◽  
Increasing Load ◽  
Worn Surfaces

18Ni(300) maraging steel, which has exceptional strength and toughness, is used in the field of aviation and aerospace. In this paper, using a high-speed tribo-tester, tribological behaviors of 18Ni(300) maraging steel were investigated under high-speed dry sliding conditions. Morphology of the worn surfaces and the debris was analyzed by scanning electron microscope, and the oxides of worn surfaces caused by friction heat were detected by X-ray diffraction. The experiment results reveal that the friction coefficient of frictional pairs declines with increasing load and speed. With the speed and load increasing, oxides of the worn surfaces of 18Ni(300) maraging steel change from FeO to Fe3O4 and the wear mechanism converts from adhesive wear into severe oxidative or extrusion wear.

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