Study on the Friction and Wear Properties of Cast Iron Under Magnetic-Mechanical Coupling Conditions

Abstract

Cast iron is widely used as a grinding tool material in the field of ultra precision manufacturing. To explore the friction and wear properties of cast iron materials under magnetic-mechanical coupling conditions, theoretical research was conducted to reveal the wear mechanism of cast iron materials. A self-developed free abrasive line contact tribometer was used to study the evolution law of different process parameters on the friction and wear properties, surface roughness, and surface morphology of cast iron. The experimental results reveal that, under the magnetic field conditions, the mean value of friction coefficient is less than 0.218, the wear capacity of cast iron rings is less than 42 mg, and the surface roughness value Ra is less than 0.139 μm, additionally, the friction coefficient, wear capacity, and roughness values are all lower than those under no magnetic conditions. For cast iron materials, the surface roughness value Ra ranges from 0.094 to 0.253 μm after the experiment, it is negatively correlated with relative sliding ratio, load, abrasive particle size, and concentration, while is positively correlated with magnetic induction intensity; The friction coefficient is negatively correlated with relative sliding ratio and magnetic induction intensity in the range of 0.051 to 0.268, and positively correlated with abrasive particle size and concentration. With the load increasing, the friction coefficient first decreases and then increases; The wear capacity of cast iron ring is within the range of 8 to 140 mg. It is negatively correlated with magnetic induction intensity, and positively correlated with relative sliding ratio, load, abrasive particle size, and abrasive concentration. This study provides support for the theoretical research of cast iron as a grinding tool material and provides reference for the rational application of cast iron materials in the field of ultra precision manufacturing.