Formula, preparation method and application of LAS-series glass ceramic abrasive binding agent

Abstract

The invention discloses a formula, preparation method and application of an LAS-series glass ceramic abrasive binding agent and belongs to the field of glass ceramic abrasive tools. The LAS-series glass ceramic abrasive binding agent is prepared from, by mass, 4-9% of Li2O, 14-20% of Al2O3, 48-58% of SiO2, 8-16% of B2O3, 0.8-2.2% of Na2O, 0.8-1.2% of K2O, 1-4.5% of MgO, 1-3% of ZnO, 0.5-1.5% of BaO and 3.5-4.5% of TiO2. The melting temperature is 1200-1300 DEG C, the sintering temperature is 600-780 DEG C, the coefficient of thermal expansion is small, the adjustable characteristic is achieved, the wettability is good, the agent is suitable for preparing abrasive tools with abrasives such as white corundum, green silicon carbide and artificial diamond, and the tools are moderate in density, low in water absorption rate and high in apparent porosity and breaking strength, have a good chip containing space and good abrasive holding force and are not prone to falling off in the machiningprocess.

Description

technical field [0001] The invention belongs to the technical field of abrasive tools, and in particular relates to a formulation of a LAS series glass-ceramic abrasive bond, a preparation method and application thereof, including a firing process of abrasive tools. Background technique [0002] Glass-ceramic bond belongs to the category of vitrified bond, and at the same time, it takes into account the characteristics of vitrified bond and resin bond. However, in terms of low melting, glass-ceramic bonds also have problems, not only high melting temperature and high energy consumption; aspects of application. Because diamond starts to carbonize at about 700°C in the air environment, and starts to carbonize at about 800°C in a vacuum environment, so if the diamond abrasive is not coated, the minimum requirement for the firing temperature of the diamond abrasive is not higher than 800°C. [0003] In order to solve the problem of high firing temperature of the glass-ceramic ...

AI Technical Summary

Problems solved by technology

For the patent of "a glass-ceramic bond for diamond composite materials" (CN 102531400 A), it is only applicable to the production of diamond materials, and the glass formula also uses highly polluting fluoride

[0004] In the prior art, such as in ZL201110049834.8, microcrystalline vitrified bonded billet grinding wheel is prepared by high-temperature sintering at 1150°C. The process is complex and the sintering temperature is high, which limits its application range; in ZL201510344724.2, boron glass is used for 20- 40%, feldspar 22-43%, nepheline powder 10-35%, clay 5-13%, lithium carbonate 2-5%, chromium oxide 3-13% to prepare vitrified bond, sintering temperature is 1000℃, micro The crystal size is 12.8-22.9 μm, the performance improvement is limited, and the sintering temperature is still high

It can be seen that there is a contradiction in the use of glass-ceramic as the binder for abrasive tool production, that is, SiO 2 and Al 2 o 3 If the content is insufficient, the required microcrystalline phase cannot be obtained. If the composition requirements are met, because they are refractory oxides, the melting temperature and microcrystallization temperature must be increased. How to use other auxiliary components and adjust their dosage is to obtain low The key technology of melting temperature and low crystallization temperature

[0005] In addition, the existing bonding agent is only suitable for the preparation of one kind of abrasive tools, and a group of glass formulas to meet the use of multiple varieties of abrasive tools has not been reported yet.

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