Stomatal structure in ceramic wheel
In order to solve the above problems, scientists from many aspects of research, including the performance of low-temperature ceramic bonding agent is the ceramic bonding agent diamond wheel memory quality and development of key factors. Therefore, the study of high strength, low temperature, low coefficient of expansion and other excellent performance of low temperature ceramic cement is superhard material ceramic wheel at home and abroad the focus of the study.
Tanaka T, Esaki S, Nishida K, etc. By further increasing the self-sharpening of the superabrasive sleeve wheel by selectively increasing the number and size of the air holes in the wheel.
Jackson MJ, Barlow N, Mills B By controlling the stomatal structure in the super-hard ceramic wheel, the wheels produced have high bond strength, good grinding efficiency and cooling during grinding. By means of thermomechanical analysis and Raman spectroscopy, the sintering shrinkage and the burning loss of diamond were investigated by sintering temperature, sintering atmosphere and sintering time by Kuan-Hong Lin, Shih-Feng Peng and Shun-Tiab Lin Studied and studied the sintering parameters and grinding characteristics of ceramic bonded diamond grinding wheel. Russian scholars choose the super-hard ceramic bonding agent formulations mainly chemical composition ratio, the choice of boron glass or boron-lead glass system as the theoretical research object. Lead glass binding agent also conducted a more in-depth study, but lead is a toxic substance, easily decomposed at high temperatures.
As early as the 90s of last century, Japanese researchers studied the requirements of high efficiency and high precision grinding of the vitrified diamond grinding wheel, such as the grinding wheel concentration and the abrasive grain requirement. The grinding performance of super-hard grinding wheel of borosilicate glass system binders with Na2O-B2O3-SiO2 as the basic component was studied. The formulation of ceramic bonding agent was mainly composed of chemical components. Boron glass or boron-lead glass system was selected as Theoretical research object.
Foreign studies, the ceramic bonding agent began toughening reinforcement research, such as binder glassy phase microcrystallization, bonding agent by adding the right amount of whiskers. They found that the addition of boric acid silicon whiskers in the binder can inhibit the formation of cristobalite on the one hand and prevent the cristobalite from cracking due to its rapid volume expansion at 100 ° C to 200 ° C. On the other hand, aluminum borate whiskers Itself can play a whisker enhance the effect, thereby increasing the tensile strength of the bond.
Due to the combination of ceramic binder and diamond abrasive, the difficulty factor is relatively large and other factors, the research and development of ceramic bonded diamond grinding wheel has been hindered. Engineers took the lead in the domestic production of gemstone with a ceramic bonded diamond grinding wheel, and developed a variety of wheel specifications, has been the gem processing field of all ages. Now developed by the grinding PCD / PCBN tool ceramic bonding agent diamond grinding wheel, diamond composite diamond grinding wheel and other series of ceramic bonded diamond grinding wheel made in the market a good reputation.