Abstract
Absorption and transition of compounds on the surface of Q235 were investigated in the plasma electrolytic nitrocarburizing (PEN/C) in an aqueous solution containing triethylamine, glycerol and sodium bicarbonate for 5–15min. Raman spectroscopy and Fourier transforms infrared spectrometer (FTIR) were used to characterize the evolution of compounds. Scanning electronic microscopy (SEM) was used to test surface morphology of Q235. It is indicated that bonds in C to C and C to N are developed from single bond to double and triple bonds. The maximum hardness of 4.76GPa with corresponding Young's modulus 107.91GPa is obtained in the plasma electrolytic nitrocarburizing layer, whereas the hardness in the substrate is 1.79GPa with corresponding Young's modulus of 59.76GPa due to the nitride and carbide strengthening. The contact fatigue friction instead of the abrasive wear of PEN/C surface in the lubrication friction appears.
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