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Sintering Diamond tool machining processes
Diamond tool machining processes - sintering
Sintered metal-bonded diamond tool manufacturing the most critical tool is sintered. Although the suppression enables an increase in contact between the binding agent powder, but only through sintering, between the particles in order to produce powerful combination of alloying, the pressure embryo into a crystal combination, this formed product adequate physical and mechanical properties to meet the need of holding the diamond and the use of safety. Sintering, the sintering process of adjustment, but also to some extent reduce the powder shape and thickness of the powder, mixed powder and pre-alloy powder.
General sintered knowledge
Sintering is the process of geometric powder heat generated between the particles bonded.
The adhesion between the powder particles is responsible for both the adsorption gas parsing, decomposition and volatilization of the organic additive component, the surface of the powder particles, the oxide reduction and oxidation after the first reduction; the powder particles ignorance migration process. The substance a result of migration so that the powder particles according to the disintegration into grain agglomerates, coalescing the strength point performance improved significantly. Therefore we can say, the occurrence of a material migration to constitute sintering the powder particles, and significantly improve the sign is the metal binder embryoid bodies sintered strength, conductive performance.
Sintering temperature
If the powder particles in sintering, the first condition is that a sufficiently high sintering temperature. In addition to the dispersion () would like to, the sintering temperature should allow the same group, significant ignorance migration occurred between different groups of powder particles to form the bonding between the particles.
Theoretically, by powder metallurgy process, as long as the appropriate sintering temperature, sintering time is long enough, the sintering organizations can achieve the process of casting alloy multi-homogeneous organization, when the material reached the highest level of physical and mechanical properties. However, the actual sintering is that by the time limit, it is limited by the temperature.
Sintered metal bond diamond tools, not the pursuit of binder carcass reaches the highest level of physical and mechanical properties, but in the specific processing requirements of a particular recipe, and under the premise of guaranteeing diamond performance, shape and structure of tea, carcass achieve an appropriate The physical and mechanical properties, allows the use of diamond tools safe and reliable, and can play a good effect. And the result is not ideal, but also by repeatedly adjust the ratio of binder and gold Jiashi to strive to meet the requirements.
Heating methods
The sintering heating can be divided into three categories: one is indirect heating; the other is the direct heating surface, the third category is the internal direct heating of pressed powder embryo.
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