Optimization of plasma nitriding parameters on wear rate of Ni-B-CNT electroless coating with different CNT concentration on AISI 4340 steel

• Main Authors: Wais, Alaa Mohammed Hussein, Ali, Abdul Raheem K. Abid, Mahoubi, Farzad
• Format: Conference Proceeding
• Language: English
• Subjects: Coefficient of friction; Deposition; Electroless coating; Electroless plating; High strength low alloy steels; Hydrogen; Ion nitriding; Nickel chromium molybdenum steels; Nitrogen; Optimization; Parameters; Response surface methodology; Wear rate
• ISSN: 0094-243X; 1551-7616
• DOI: 10.1063/5.0119445

The aim of work a statistical study of the effects of plasma nitriding parameters such as deposition temperature, deposition time, concentration of CNT and percentage nitrogen and hydrogen flow on the wear behavior of electroless coating (Ni-B and Ni-B-CNT) on AISI 4340 steel was examined using response surface methodology (RSM) method based on a central composite design. Results indicated the effects for temperature of the deposition and the deposition time on rate of the wear for plasma nitriding of samples in the constant concentration CNT (0.35%) and percentage hydrogen/nitrogen ratio(50%). The rate of the wear for samples is decrement by an increment of deposition time and an increase in the temperature from range 350 °C - 400 °C and increased by a another increment in temperature of the deposition from range 400 °C - 450 °C. Rate of wear for the materials depends not just into condition of wear test, but also with several properties of material and features as topography, hardness and friction coefficient.