Iron & Steel Society of Iran International Journal of Iron & Steel Society of Iran 2981-0388 13 2 2016 12 01 Tribological Properties of B4C-Ni Cermet Coating Produced by HVOF Process on the Surface of 4130 Steel Tribological Properties of B4C-Ni Cermet Coating Produced by HVOF Process on the Surface of 4130 Steel 19 25 23709 EN M. Rafiei Advanced Materials Research Center, Department of Materials Engineering, Najafabad Branch, Islamic Azad University, Najafabad, Iran M. Shamanian Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran M. Salehi Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran H. Mostaan Department of Materials and Metallurgical Engineering, Faculty of Engineering, Arak University, Arak 38156- 8-8349, Iran Journal Article 2017 01 16 In this research, B4C-Ni cermet coating was sprayed on the surface of 4130 steel from B4C and Ni feed-stock<br />powders using high velocity oxy-fuel (HVOF) method. In order to characterize the tribological behavior of the<br />coating, ball on disk wear tests were done at the ambient temperature and under the loads of 1, 3 and 5 N.<br />Phase analysis of the coating after spraying was studied by X-ray diffractometery (XRD). Microstructure of the<br />coating and wear track was evaluated by scanning electron microscopy (SEM), field emission scanning electron<br />microscopy (FE-SEM) and energy dispersive spectroscopy (EDS). The microhardness test was done to measure<br />the hardness of the produced coating. It was found that a good coating with suitable interface and no significant<br />pores and cracks in the microstructure of coatings was formed. The main wear mechanism of the coating was<br />delamination with some oxide layers due to the frictional heat during wear test. https://journal.issiran.com/article_23709_ee8f5e56a73749d0b11d666c05695f16.pdf