Abstract No.:

Surface properties of WC - 12Co coatings sprayed by HVOF

AYSUN Ayday* / Sakarya University, Engineering Faculty , TURKEY
Y1ld1z Yaral1 Yarali Ă–zbek / Sakarya University, Metallurgical and Materials Engineering Department, TURKEY

The wear resistance of thermally sprayed WC12Co coating layers fabricated by the HVOF (High-Velocity Oxygen Fuel) process on a stainless steel substrate were investigated. The microstructure and chemical composition of the phases in the coatings were characterized by means of the SEM and XRD techniques. Microhardness tests were carried out on the cross sections of the coatings to evaluate the hardness. Wear test was done in CSM-linear wear test machine with 0.10 m/s constant sliding speed under 5N, 7N, and 9N loads for 500 m. Worn surfaces of specimens were studied by SEM, EDS analyses techniques. It was observed that friction coefficient and wear value were changed in accordance with load. Friction coefficient values of coated specimens were lower than that untreated samples. Wear resistance was increased in coated samples.

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