After cutting disc cut several times soft, what is the reason

First, look at what materials you cut, you cut followed depends on the thickness of the material is usually the case after cutting disc Jidao softened reasons:
1. The thickness of the material being cut, large cut pieces while lifting area, resulting in adverse heat;
2. The material itself is cut low melting point, partial combustion during the cutting process, such as cutting wood, as this type is not suitable for flat cutting disc operations;
3. Cutting-chip, low hardness, poor quality, after cutting wear and tear, resulting in direct friction between the cutting plate and the material being cut, a lot of heat, cutting discs  soften.