20/03/2026
How to Adjust Diamond matrix when diamond tools face Problems Like diamond doesn't sharpen and Short Lifespan?
Diamond matrix is too hard and won't sharpen? Diamond matrix is too soft and has a short lifespan? If your diamond tools face problems like Diamond doesn't sharpen and short lifespan, how should you adjust them?
Most diamond tool manufacturers use pre-alloyed powder as the base powder , which can be roughly divided into the following categories:
1: Iron-based pre-alloyed powder. Characteristics: Relatively low cost, Good mechanical properties,range of adjustment is wide.
2: Cobalt-based pre-alloyed powder. Characteristics: Good wettability to diamond, balance of wear resistance and toughness is good, but high cost.
3: Copper-based pre-alloyed powder. Characteristics: Low melting point, low hardness.It is suitable as sharp tools for hard materials.
4: Tungsten-based pre-alloyed powder. Characteristics: High hardness, high wear resistance, it often used for highly abrasive materials.
By learning the characteristics of several materials, then we can go head on how should you adjust Diamond matrix if your tools face problems like Diamond doesn't sharpen and short lifespan?
First, we need to understand that different materials need different design of the tool matrix material.
For example, when cutting softer materials like sandstone and asphalt, tools require highly wear-resistant matrices. Cobalt-based or tungsten-based alloys (such as Fe-Co-WC) are typically used to increase the holding force of the diamond and prevent it from falling out prematurely. However, excessive holding force and an overly hard matrice can lead to poor edge sharpness. In such cases, adding some Cu or Sn is necessary to adjust the self-sharpening properties. Conversely, when cuttinging harder materials like granite, marble, and porcelain, rapid wear of the matrice is required to maintain the diamond's sharpness and ensure continuous edge sharpness. The matrice typically uses copper-based or iron-based alloy powders (such as Fe-Cu-Sn). However, the proportion of iron powder added cannot be too high, otherwise the sintering temperature will be too high, causing low-melting-point metal segregation and flow. In this case, adding highly active ultrafine iron powder or Sn can be considered to lower the sintering temperature.