Alloy Powders And Diamond Diffusion Connection
Alloy Powders and diamond diffusion connection
The use of Alloy Powders method to achieve the diffusion of diamond brazing connection is to improve the diamond and the carcass binding force of the effective way. The addition of chromium, titanium, vanadium, zirconium, nickel, manganese and other metals to the Alloy Powders can improve the infiltration of the alloy to the diamond, increase the cutting edge height of the diamond and improve the utilization rate of the diamond. On the other hand, Stable composition, to overcome the mechanical mixture of the proportion of segregation, low melting point of the first melting and enrichment of metals, easily oxidized and volatile metal in the sintering process was burned and other factors affecting the performance of the carcass, to ensure the stability of the diamond blade Sexuality and consistency.
1 Alloy Powders main features
Synthetic diamond head of the carcass generally by the skeleton components and two components of the composition, the general use of a group of low melting point metal used as a binder, if a variety of metal pre-melting into a low melting point alloy and then into the Alloy Powders, Alloy Powders is a good performance of the binder.
The use of Alloy Powders as a diamond tool body of the binder, easy to adjust the carcass performance, making it more suitable for processing objects, and because the pre-alloy is pre-melting into the alloy, and then made of powder, so each powder All contain a variety of metal elements that make up the alloy, which is much more uniform than the mechanical mixing of multiple single metal powders. In the process of sintering into a diamond blade, as long as the temperature rises to the melting temperature of the Alloy Powders, the entire binder component of the powder to melt, and can not take into account the different components of the binder melting temperature difference difficult to develop a reasonable sintering temperature The problem.
The main advantages of using the Alloy Powders as the binder of the diamond tool carcass are as follows.
The use of Alloy Powders made of diamond tools, can improve the carcass on the diamond inclusions, and the impact of better performance, improve the utilization of the diamond.
The Alloy Powders does not contain volatile easily oxidized elemental elements, the use of Alloy Powders made of diamond tools to improve the compactness of the carcass and uniformity, thereby improving the wear of the carcass state.
Can be based on the difference in the performance of the object of targeted selection of different nature of the Alloy Powders, simplifying the work of carcass ingredients. The sintering temperature of the inserts depends mainly on the melting point of the high melting point metal in the bonding metal, the melting temperature of the Alloy Powders is low, the hot pressing temperature is low, and the heat damage caused by the sintered high temperature to the diamond can be avoided.
Alloy Powders melting interval is narrow, at a certain sintering temperature should be able to just wet the diamond, and under pressure can flow. In the hot pressing process, the Alloy Powders and the skeleton composition reaction, is conducive to enhance the mechanical properties of the carcass, and will not form a low melt
At the normal working temperature of the diamond tool, the Alloy Powders does not remel or deform, ensuring that the adhesive layer can withstand the stress of the hard particles (skeletal components and diamonds) in the carcass without causing deformation or loosening.
2 Alloy Powders and diamond diffusion connection
The use of a variety of metal smelting into a low melting point alloy and then atomized into powder to form Alloy Powders, Alloy Powders on the wetting of diamond diffusion depends mainly on the formation of carbide tendency and alloy liquid state under the interface tension.
Copper alloy on the diamond and other wetting performance improvement, mainly depends on the addition of alloying elements can make a sharp decline in the interfacial tension. The adsorption of alloying elements on the interface can reduce the interfacial tension of the liquid alloy, and the interfacial carbide generation reaction can reduce the interfacial tension more.
In the process of sintering into a diamond tool carcass, as long as the temperature rises to the melting temperature of the Alloy Powders, the entire binder component of the powder began to infiltrate the diamond, and to the diamond diffusion, in order to achieve brazing connection.