Effect of Kerosene Flow Rate on the Friction and Wear Resistance and Electrochemical Corrosion Resistance of WC-10Co4Cr Coating AITranslate

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Chinese Library Classification Number:TG174.2[金属学及工艺—金属表面处理]

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WC-10Co4Cr coatings were prepared on the surface of 45 steel by highvelocity oxygen-fuel spraying technology at different kerosene flow rates(22.0 L/h,22.8 L/h and 23.6 L/h).The effects of kerosene flow rate on the microstructure,mechanical properties(hardness and fracture toughness),friction and wear resistance and electrochemical corrosion resistance were studied.The results indicate that as kerosene flow rate increases,porosity of the coating cross-section decreases at first and then increases,the microhardness of coatings rises and the fracture toughness sinks.After friction and wear tests with a load of 1100 N,both the width and depth of wear scars on the coating surface obviously decrease with increasing kerosene flow rate.When kerosene flow rate is 23.6 L/h,the oxidation degree of wear scars on the coating surface is relatively high and the friction and wear resistance is relatively excellent.The wear mechanism for the three coatings is abrasive wear.As the kerosene flow rate increases,the electrochemical corrosion resistance of the coating ascends at first and then descends.When the kerosene flow rate is 22.8 L/h,the coating exhibits the best electrochemical corrosion resistance.