Wear mechanism and life assessment method of steel grit

　　The wear mechanism of steel grit mainly includes the contact and friction between the abrasive particles and the grinding surface. When abrasive particles come into contact with the workpiece surface during grinding, they exert pressure on the workpiece surface and generate shear forces and friction between the abrasive particles. These forces cause the abrasive particles to gradually wear away and lose their original shape and size.

　　During the grinding process, steel grit wear can occur in the following ways:

　　1. Splitting wear: When abrasive particles are subjected to excessive pressure, splitting occurs, causing the abrasive particles to break into smaller particles.

　　2. Collision wear: Collisions between abrasive particles cause surface wear.

　　3. Grinding wear: During the grinding process, the contact between the abrasive particles and the surface of the workpiece generates friction, causing the surface of the abrasive particles to gradually wear away.

　　When evaluating the life of steel grit, the following methods can be used:

　　1. Study the wear rate: Experimentally measure the wear rate of steel grit during the grinding process to estimate its life. Measurement and analysis can be carried out using methods such as weight loss method, volume loss method or shape degradation method.

　　2. Quantitatively evaluate the changes in abrasive particle morphology: observe the changes in abrasive particle morphology through morphological analysis methods, such as scanning electron microscopy, and then evaluate the lifespan.

　　3. Establish a life model: Establish a life model through experimental data and theoretical models to predict the life of steel grit. The life model can consider factors such as grinding parameters (such as grinding speed, depth of cut, etc.), steel grit characteristics (such as particle hardness, structure, etc.), and workpiece materials.

　　It should be noted that different grinding materials and working conditions may lead to different wear mechanisms and life evaluation methods. Therefore, in specific applications, analysis and evaluation must be carried out based on the actual situation.