Diamond working area and the welding layer which contains no diamond.

Diamond working area and the welding layer which contains no diamond. The characteristics of a single grain size of diamond and wide horizontal spacing of diamond can improve the sharpness of blades, and high sharpness can ensure the blade is suitable for cutting granite of different hardness degree. In addition, the diamond longitudinal arrangement is interlaced, which can ensure the continuous diamond exposure and stable cutting . The welding layer contains no diamond), which can guarantee the welding strength and cutting safety of the blade.