Enhancing the hardness of the band saw is a necessary c […]
Enhancing the hardness of the band saw is a necessary condition for improving the cutting performance. At present, it is technically allowed to harden the cutting part of the band saw blade separately, that is, through the electric spark strengthening method, the tooth tip plating method, the high frequency quenching method or the grinding wheel grinding method, etc., the hardness of the saw blade itself is HRC35- 38, and the hardness of the cutting part can reach HRC60. The elongation of the band saw blade is generally 4~10%. Not only can the saw blade be easily squeezed and shifted, it must also be able to withstand the elastic fatigue caused by the repeated bending of the band saw blade during work. Therefore, the band saw blade must have appropriate toughness. The band saw blade is tightened on the saw wheel. If the band saw blade does not have enough tensile strength, there is a danger of breaking. Therefore, the better the tensile strength of the band saw blade, the better its quality. The tensile strength of domestic band saw blades is 140-160 kg/mm2. The durability of the saw blade refers to the performance of the saw blade to cause fatigue and damage when resisting vibration and variable loads. This performance is particularly important for band saw blades. Under normal circumstances, band saw blade cracks are one of the factors worth considering. The high or low durability of the saw blade is not only related to the carbon content, but also related to heat treatment, surface finish and corrosion. When the surface of the saw blade is rough or corroded, the durability of the band saw blade will be reduced by 30-50%.