Diamond Tools Brazing Furnace

The high hardness and excellent physical and mechanical properties of diamond make diamond tools an indispensable tool for processing all kinds of hard materials. The adhesion of the carcass metal base to diamond (the inclusion of the carcass) is one of the main factors affecting the service life and performance of the diamond tool.

Due to the high interfacial energy between diamond and common metals and alloys, the diamond particles cannot be infiltrated by the general low-melting alloy, and the adhesion is extremely poor, which causes the diamond particles to be easily separated from the carcass metal matrix during work, greatly reducing The life and performance levels of diamond tools. Most of the impregnated tools have a low utilization rate of diamonds, and a large amount of expensive diamonds are lost in the work and lost in the waste. Lin Zengdong and others took the lead in using diamond surface metallization technology to impart many new characteristics to the diamond surface, such as excellent thermal conductivity and thermal stability, improving its original physical and chemical properties, and improving its wettability to metal or alloy solutions.

At the end of the 1980s, people began to explore brazing technology for diamond tool making. Some transition group elements (such as Ti, Cr, W, etc.) are plated on the diamond surface and chemically reacted with them to form carbides on the surface. Through the action of this layer of carbide, the diamond, the binder and the matrix can achieve a firm chemical metallurgical bond by brazing, thereby realizing the true metallization of the diamond surface, which is the principle of diamond brazing. As can be seen from the published patents and articles, this technology can make the maximum edge value of diamond reach 2/3 of the particle size, and the tool life can be increased by more than 3 times, while the conventional value is less than 1/3, allowing the edge value to be opened. The blade operation is obtained when the blade value is stabilized. Therefore, the use of brazing technology is expected to achieve a strong bond between the carcass metal (solder) and the parent material – diamond and steel substrate.

PCD/PCBN Vacuum Brazing Furnace