Study on the properties and process of gin sawtooth blades via PCVD

This study investigates the application of PCVD (Plasma-Enhanced Chemical Vapor Deposition) process to enhance the performance and durability of sawtooth blades for cotton ginning. The 65Mn sawtooth blades were selected as the substrate for treatment. Through a series of orthogonal experiments, hardness, wear resistance, and microstructural analysis were conducted. The results revealed that the chromium-aluminum nitride layer formed during the PCVD process significantly increased the hardness (over 500 HV) and wear resistance (1.45 times higher than untreated blades). The optimal treatment parameters were determined to be a heat preservation temperature of 300 °C, holding time of 800 min, and a gas flow rate of 100 sccm. ANOVA results confirmed the statistical significance of these parameters, with heat preservation temperature and gas flow having a highly significant effect on the hardness and flatness of the blades (p < 0.01), while the coating thickness showed less significant interaction.Treated gin sawtooth blades demonstrate improved wear resistance and longer service life, addressing their frequent replacement issue. Extending this single-component-originated surface treatment to diverse agricultural machinery components underscores its high versatility and broad application potential.