Sintering Temperature of Grinding Wheel and Refractoriness Range of Binder

Grinding Wheels Manufacturers experimented with the high temperature stability of diamond abrasives, and found that the oxidation reaction of diamond abrasives will happen in air when the temperature is higher than 700 ℃, which will damage diamond abrasive. The thermal damage of diamond abrasives in high temperature is associated with the grade and particle size of diamond abrasives. In the same temperature, the granularity will be finer, and the thermal damage degree of diamond abrasives is higher if the grade is lower; Engineer changed the sintering process, which reduces the thermal damage of diamond abrasives in high temperature of 750 ℃.

According to the thermal stability of diamond abrasives, we can determine the sintering temperature of grinding wheel and refractoriness range of binder. We use the principle of free energy formation of oxide to analyze the reaction conditions of several oxides in the sintering temperature between diamond abrasive and grinding wheel, which will determine the chemical composition of binder. According to theory of glass structure, we can know the content of each component in the binder, determine the binder formula and make sure it is suitable for industrial production.

Grinding wheel binder is the most important raw materials in the production of grinding wheel. The preparation technology of binder determines the technological process of binder preparation. researchers discuss the influence of different heating curves on the metallurgical binder performance, and find that only when the water of crystallization of binder materials and easily decomposed substances finish their decomposition temperature completely and again rise to smelting temperature, the binder will have stable performance; And researchers experimented with the binder performance, and find that the refractoriness of smelting binder is low (580-630 ℃), with small thermal expansion coefficient (7.2-8.0~*10 ~ (-6) ℃~(-1)), and high flexural strength (45-58MPa), and it can hold the strength of diamond grits, which is suitable for manufacturing grinding diamond compact and ceramic bond diamond grinding wheel.