Tribological and mechanical behavior of WC-Ni hardfacing using Ni-Cr as interlayer

International Conference and Expo on Ceramics

August 17-18, 2015 Chicago, USA

Cheniti Billel1,2, Yahmi Youcef1, Miroud Djamel,2, Maamache Bouzid1, Allou Djilali1, Daoud Ismail2 and Badi Ridha1

Posters-Accepted Abstracts: J Material Sci Eng

Abstract :

One of the most important techniques employed to obtain drilling tools used in oil and mining fields is hardfacing. In this work,
the wear resistance and mechanical behavior of WC-Ni hardfacing with Ni-Cr as interlayer are carried out. Oxyacetylene
brazing technique is employed to diposit WC-Ni upon the substrate, which is a XC18 steel, whereas, the interlayer Ni-Cr is obtained
by thermal spray process. Several studies were done on the characterization of WC in metallic matrix, using different procedures of
coating such as, Tungsten Inert Gas (TIG), Laser and HVOF technique. The present work sums up the interlayer influence on the
mechanical properties of the coating, and exhbits the decarburization of WC particals causes by the temperature reached during
the hardfacing. The WC-Ni behavior is evaluated by tribology tests, using CSM instrument. Wear experiment is perfermed at
room temperature with dry sliding pin-on-disk experiment. While, metallographic examination is done using Scanning Electron
microscope (SEM) to exhibit the interfaces and to assess the decarburization of WC particles. Furtrhermore, hardness profile is
performed to evaluate the evolution of mechanical properties across the interfaces.

Biography :

Cheniti Billel is a Research Associate at the Metallurgy and Mechanics Division, at the Centre for Scientific and Technical Welding and Control (CSC), Algeria
currently working on the project, “Mechanical and Metallurgical properties of multilayer materials made by coating processes and hard facing”. His research
interests are metallurgy and material chemistry. He has his Bachelor’s degree in Materials Engineering and Metallurgy & protection against corrosion at Ecole
Nationale Polytechnique of Algiers.