What Are the Methods to Check PCD Cutters Hardness?

Do you know methods for the examination of the hardness of a PCD cutter? For the time being, the more popular method is using diamond, mainly because of its relatively large strength, which can greatly improve the efficiency of work in the use of time. However, there are various brands on the market now, which also leads to the emergence of many unqualified products, and the hardness will have problems. Therefore, it is necessary to master some testing methods. The methods for detecting the hardness of PCD cutting tools are as follows:

1. Chemical heat treatment is used in PCD cutters

Doping the surface of the workpiece with atoms of one or more chemical elements alters the chemical composition, organization, and performance of the workpiece's surface. The workpiece's surface has high hardness, wear resistance, and contact fatigue strength after quenching and low-temperature tempering, while the core has high toughness.

2. Surface quenching and tempering heat treatment for PCD cutters

Induction heating or flame heating are commonly used to perform surface quenching and tempering heat treatments on PCD cutting tools. Surface hardness, local hardness, and effective hardening layer depth are the most important technical factors. Vickers hardness testers, as well as Rockwell and surface Rockwell hardness testers, can be used to test hardness. The depth of the effective hardening layer and the workpiece's surface hardness influence the PCD cutter test force (scale).

3. Local heat treatment for PCD cutters

If the local hardness requirements are high, induction heating and other methods of local quenching heat treatment are possible, such parts must be identified on the design with the location of the local quenching heat treatment and the local hardness value.

If the strength of the PCD tool is not high, the crystal will not be easily broken, the abrasive particles will be polished during use, and the sharpness will decrease, resulting in the deterioration of the tool performance. When the diamond strength is not enough, it is easy to break after being impacted, and it is difficult to bear the heavy responsibility of cutting.