Polycrystalline diamond compact the PCD (PolyCrystalline Diamond) layer and carbide substrate. The PCD layer has high hardness, carbide substrate with good toughness, a combination of both the PCD composite sheet widely used in cutting, wood processing, and drilling industries. The PCD tool making in a variety of ways, largely based on the heating mode, the use of solder or not to divide. Heating plays a decisive role in the production process, the choice of solder a significant impact on the design of welded joints of the structure is also an important means to improve the quality of welding quality. Therefore become a key technology in the manufacturing process of PCD tools, welding.grinding wheel

The welding PCD composite sheet essentially is the welding of the cemented carbide substrate and the toolholder support member. Multi-Mn-based solder of carbide welding, brazing temperature of about 1000 ℃. However, the heat resistant temperature of the PCD layer is generally not more than 700 ℃, otherwise it will cause thermal damage of the PCD layer, reducing the performance of the tool after welding using. Must therefore be to find a both reduce the temperature of the brazing, but also at the same time to ensure a sufficient welding strength welding method. PCD composite sheet welding method of laser welding, vacuum diffusion welding, vacuum brazing, a high-frequency induction brazing, cooled brazing, an inert gas protection brazing. Weld strength is sufficient, but the high cost of some equipment used, maintenance costs, and complex process, not easy production operation, greatly increased the production costs of the PCD composite piece tool, and is not conducive to the promotion and application of the PCD tool. In this paper, a comparative analysis of the advantages and disadvantages of various PCD composite sheet welding method.abrasive wheel