Abstract
Purpose – The purpose of this paper is to characterize carbide coatings obtained by thermo reactive diffusion (TRD) method on AISI 52100 and 440C bearing steels, which are extensively used in industry, and to study wear behaviour of coated steels at elevated temperatures.Design/methodology/approach – For coatings of vanadium and titanium carbides, TRD treatment is performed on AISI 52100 and 440C steels using pack method at 950°C for 3 h. Carbide coatings are characterized using X‐ray diffraction (XRD). The Daimler‐Benz Rockwell‐C adhesion test and micro‐Knoop indenter is used to assess the adhesion and hardness of the carbide layers, respectively. Ball‐on‐disc arrangement is used for determination of tribological properties of carbide‐coated steels. Friction and wear tests are carried out against Si3N4 ball at elevated temperatures up to 600°C under 5 N load, for sliding speed of 0.3 m/s.Findings – The presence of carbides formed on AISI 52100 (Ti6C3.75 and VC0.88 phases) and on AISI 440C (Ti6C3.75, VC0....
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