The hardness of high hardness thermal spraying coating such as super alloy and special ceramics is generally above 1000Hv0.2, the coating thickness is between 0.1mm and 0.5mm,
and the thermal spraying layer is hard and thin. In the grinding process, due to the high hardness of the thermal spray coating, diamond abrasive tools are often used for processing. Diamond has a Mohs hardness of 10, which is the highest hardness material currently found. It is especially suitable for processing non-metallic and non-ferrous metal hard-to-process materials with high hardness and high brittleness.
The diamond belt made by electroplating process has high bonding strength between diamond and base cloth, and the arrangement of grinding units with gaps, it has better chip removal performance and lower grinding temperature, which not only guarantees the surface quality of the workpiece. Can also ensure the internal quality of the workpiece, thereby improving the fatigue strength of the parts, extending the service life, and improving the production efficiency. The grinding process of diamond belt also has the characteristics of less dust, low noise and low energy consumption, which is in line with China's energy conservation and environmental protection policy.
Diamond belts have high surface quality for grinding workpieces, which is mainly manifested in the small surface roughness value, good residual stress state, and no micro-cracks or metallographic structure changes on the surface. From the perspective of surface roughness, diamond belt grinding has reached Ra0.01mm at present, achieving the effect of mirror grinding, and it is very easy to achieve when the roughness value is above Ra0.1mm. Therefore, diamond sanding belts and their derivatives are the best products for grinding and processing high-hardness thermal spray coatings.
---EDITOR: Sarah Shi
---POST: Doris Hu
