Abstract:Using ultrasound in processing high frequency longitudinal vibration transmission, the advantage of fine processing is realized. In order to improve the drilling of iron base material forming of the characteristics of friction surface, the Fe-Cr-B alloy microstructure under ultrasonic drilling processing molding was researched, and the influence of processing parameters (vibration frequency and load) on the friction performance was analyzed. The research results show that the Fe-Cr-B alloy consists of Fe phase, FeCr and Fe2B phases, and uniform distribution of each phase is in the alloy substrate. Because Fe2B phase in the matrix formed, furrows and plastic deformation resistance is increased further, and boron element in Fe-Cr alloy has good reinforcement effect. Under the ultrasonic drilling process, Fe-Cr-B alloy friction coefficient is reduced with the increase of load and vibration frequency, and increased with the increase of vibration frequency. Samples under the condition of different rate have slightly lower wear rate, and wear mechanism of Fe-Cr-B alloy is slight furrow and plastic deformation.