Abrasive Hardness Introduction

The hardness of abrasives mainly depends on the amount of binder added and the density of abrasives, abrasive particles are easy to fall off, indicating low abrasive hardness; On the contrary, it means high hardness. Hardness grades are generally divided into super soft, soft, medium soft, medium hard, hard and super hard seven grades, from these grades can also be subdivided into a number of small levels. The more commonly used methods to determine the hardness of abrasive tools are hand cone method, mechanical cone method, Rockwell hardness tester method and sandblasting hardness tester method.The hardness of abrasives corresponds to its dynamic elastic modulus, which is conducive to the use of audio method to determine the dynamic elastic modulus of abrasives to express the hardness of abrasives. In the grinding process, if the material hardness of the grinding parts is high, the abrasive tools with low hardness are generally selected; On the contrary, the abrasive tool with high hardness is selected.