The Solution to the Coating Falling off of Diamond Grinding Wheel

2020-11-12 2556

With the development of the economy and the advancement of science and technology, the requirements for electroplating diamond in different professions are basically the same, namely high efficiency, long lifespan, and high grinding accuracy. To ensure these characteristics, the coated metal should not only have high hardness and wear resistance, but also be evenly distributed in various parts of the substrate to prevent the coating from falling and shortening its lifespan. In the actual use process, the phenomenon of coating falling is endless. This article analyzes the reasons for this issue and briefly discusses the solutions.

During the use of electroplated diamond materials, due to factors such as grinding force, temperature rise, and impact of the workpiece, there may be a phenomenon of separation between the metal coating containing diamond and the steel substrate, which is called coating detachment. In actual use, the metal layer separation of the coating in the metal coating containing diamond: During the use of the metal coating containing diamond, the coating metal in contact with the workpiece is not worn normally, but falls off abnormally in flakes or powder form. Diamond does not fall off completely, but locally in granular form.

Methods for Handling the Falling of Diamond Coatings

The following measures can be taken to address the issue of plating falling due to the reasons mentioned above:

(1) Strengthen the pre-treatment before plating, remove burrs, oil stains, oxide films, rust, and oxide scales on the surface of the substrate as much as possible, promote the normal growth of the metal lattice of the coating, and improve the bonding force between the coating metal and the substrate metal.

(2) Optimize the process and procedures, reduce the power outage during sand unloading, and even continuously discharge sand, thicken or discharge sand with electricity in the original sand loading tank, or in a backup tank, to improve the bonding force between diamond particles and the coating. If there is a power outage during the thickening process and the workpiece is to be re thickened, it should be placed in an electrolyte for cathodic reduction. After reduction, it should be charged and electroplated into the groove to ensure the adhesion of the coating.

Article source: Diamond grinding wheel