Friction, wear, and corrosion behavior of nitrocarburized HT250 gray cast iron

• DOI: 10.1016/j.ijoes.2024.100582
• Publication Date: 2024-04-10T07:03:58Z
• Authors: Ronfa Chen; Haibo Chen; Chengcong Ye; Fangfang Li; Yulong Miao; Yihong Zhao; Xinhao Sun; Zesen Zhao
• Keywords: Diffusion layer

This study employed friction and wear experiments on nitrocarburized HT250 gray cast iron, utilizing GCr15 cemented carbide balls as the pair, to investigate behavior mechanism of compound layer, diffusion matrix. The findings indicate that layer exhibits highest resistance, followed by while matrix shows lowest resistance. At lower loads, form is characterized minor flaking wear, abrasive displays adhesive accompanied wear. With increasing transitions fatigue demonstrates severe Electrochemical impedance spectroscopy potentiodynamic polarization were corrosion in a 3.5 wt% NaCl solution. results 27.7% decrease current density compared matrix, with exhibiting two orders magnitude than both layer. In electrochemical spectroscopy, modulus, largest phase angle amplitude, circular arc radius. It resistance iron improved after nitrocarburizing, especially