Because it is participating in the sintering process, the steel core cannot be quenched, so the hardness and strength of the core are not very high. This means that these types of diamond blade may deform in high-load and high-intensity cutting processes and can exhibit low cutting efficiency.
The text explains that the lack of quenching in the sintering process limits the hardness and strength of the steel core in these diamond blades. This makes them prone to deformation under heavy loads and intense cutting conditions, resulting in reduced cutting efficiency.