Knowledge of diamond grinding wheel coating peeling off

What are the reasons for the falling off of the diamond grinding wheel coating, and what are the forms of falling off? During the processing and use of the diamond grinding wheel, factors such as the size of the grinding force, the change of temperature and the impact of the workpiece cause the metal coating of the diamond grinding wheel to be separated from its matrix, which is the shedding of the diamond grinding wheel coating. The diamond grinding wheel is made of diamond abrasive as raw material, with metal powder, resin powder, ceramics and electroplated metal as binders. , High grinding efficiency, not easy to generate heat and blockage during grinding, and small thermal expansion. The peeling off of the coating is generally a partial peeling off, and it is very rare for the coating to peel off completely. The reason for the shedding of the coating is mainly caused by the process problems of the electroplated diamond grinding wheel in the production process. If there is the slightest error in any process, the coating will fall off. Generally, there are three main forms of coating peeling:

1. The coating falls to the surface of the substrate: that is, the diamond-containing metal coating and the diamond-free metal bottom coating are separated from the steel substrate at the same time. The working layer of the diamond grinding wheel, also known as the diamond layer, is composed of abrasives, binders and fillers, and is the working part of the abrasive tool. The transition layer, also known as the non-diamond layer, is composed of binder, metal powder and filler, and is the part that firmly connects the diamond layer to the substrate.

2. The layer falls to the metal bottom coating: that is, the metal bottom coating without diamond is not separated from the steel substrate, but the diamond-containing metal coating is separated from the metal bottom coating. The diamond grinding wheel is made of diamond abrasive as raw material, with metal powder, resin powder, ceramics and electroplated metal as binders. , High grinding efficiency, not easy to generate heat and blockage during grinding, and small thermal expansion.

3. The coating layer in the diamond grinding wheel coating is separated from the metal layer, and the coating metal in the contact part of the workpiece is not related to normal wear and tear. This phenomenon is not easy to attract the user's attention, which will shorten the use time of the diamond grinding wheel and increase the production cost for the user. . Therefore, in the normal use process of the user, once there are continuous large holes on the surface of the diamond grinding wheel, attention should be paid to prevent the coating of the tool from falling off.