As we all know, ceramic grinding wheels have many advantages, such as high strength, good heat resistance, sharp cutting, etc. Although there are many advantages, cracks occasionally occur during use. What are the causes of its cracks? Follow the editor to have a look!
It is understood that the fracture of ceramic grinding wheels is generally affected by mechanical shock and thermal shock. Mechanical shock generally includes flipping impact during molding, impact during transportation, excessive pressure during processing, excessive cutting, etc.; thermal shock includes heating too fast, cooling too fast, drying too fast, etc. Once the internal cracks are formed and reach a certain critical scale, they are easy to expand. The internal stress will immediately concentrate on the cracks and extend to both ends. Abrasives cannot absorb the energy brought by external forces through changes in their own shape like metals. It can only absorb this part of the energy by naturally generating a new appearance. The expansion of cracks means the composition of two new appearances.
Abrasives cannot withstand strong vibration shocks, and the nature of bumps is called brittleness. The size of brittleness can be expressed by the energy required to form a unit new appearance. This is called cracking work. The greater the cracking work, the greater the toughness.
The above is what I want to share with you. Ceramic bond diamond grinding wheels have more and more obvious advantages in the grinding of some special materials such as diamond, industrial ceramics, diamond composite sheets, diamond polycrystals, diamond tools, cubic boron nitride, hard alloys and other high-hardness and brittle materials, and have good prospects in the development of diamond abrasives. It is considered to be a high-performance abrasive with high speed, high efficiency, high precision, low grinding cost and low environmental pollution. It has more and more extensive applications and is a hot spot for the research and development of grinding tools in various countries around the world.