Diamond grinding wheels are generally composed of a diamond abrasive layer, a transition layer and a matrix.

The quality of diamond abrasive directly affects the quality of the grinding wheel. Most of the diamond grinding wheels we produce are used for grinding and polishing, 

so we use more micro-powder-grade materials. The control of diamond micro-powder particle size is particularly important. 

The aspect ratio of diamond micro-powder particles should generally not be greater than 1.5 times, and there should be no over-wide particles. 

As long as there are oversized coarse particles, it will cause scratches on the workpiece, making the work of the previous process useless, 

Therefore, diamond particles are usually as shown in the following figure:

If the grinding wheel is made of particles exceeding the standard, the edge quality of the ground PCD tool will be unstable and prone to chipping. 

Therefore, the quality inspection of micro powder is an important part of ensuring the quality of the grinding wheel. 

To ensure that the edge quality, service life and cutting efficiency of the processed PCD tool can maintain a good stability from the beginning of use of our grinding wheel to the last 1mm.

However, some defects of the material cannot be observed by the naked eye. There are many instruments available for measuring the particle size of micro powder. 

Good micro powder is observed under a microscope, with good transparency, a transparent core surrounded by a black edge outline,

 and relatively high strength; micro powder that is completely black has many impurities and inclusions inside, and relatively low strength. 

To achieve a better grinding effect, the material must be round, well concentrated, and thick.

We usually conduct tests according to the customer's requirements. Through our tests, we found that if some thin materials are mixed into the material, 

the grinding wheel density will be uneven when pressing the grinding wheel, which will cause diagonal cracks. Such cracks are invisible and cannot be observed on the surface, 

but if the pressed material ring is broken, it will be found that it will break along the cracks. When customers use this grinding wheel to process workpieces, 

the cracks will easily break and accidents will occur. If the material strength is relatively low, the particle size is uneven, or there are many thin slices, after sintering,

 the material ring will expand greatly, resulting in insufficient hardness of the grinding wheel and excessive size,

which will reduce the life of the grinding wheel and the number of PCD tools processed will also decrease sharply. 

And so on, a series of tests. Our goal is to become a more trusted supplier for end users.