Diamond saw blade with high impact resistance, toughness and hardness and diamond tool bit manufacturing process

The invention discloses a high-impact-resistance high-toughness high-hardness diamond saw blade and a manufacturing process of a diamond tool bit. The diamond saw blade comprises a tool bit base body and the diamond tool bit welded to the periphery of the tool bit base body. The raw materials of the diamond tool bit comprise the following components in parts by weight: 2.0-5.5 parts of diamond particles, 13-33 parts of copper, 2-7 parts of nickel, 4-7 parts of silicon nitride powder, 5-10 parts of nano silicon dioxide, 2-10 parts of cobalt, 2-7 parts of chromium, 3-6 parts of zinc, 1-5 parts of tungsten, 0.1-0.7 part of a binder and the balance of iron. Through scientific proportioning and combined action of all the raw materials, the hardness and bending strength of the material are good, the wear resistance of the saw blade is improved, the service life of the saw blade is prolonged, and the performance of the material meets the performance requirements of the saw blade in application. 本发明公开了抗击韧性强、硬度高的金刚石锯片