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A technology of abrasives and raw materials, which is applied in the field of sintered abrasives and preparation, to achieve the effects of reducing grinding processing costs, changing grinding processing performance, and improving processing accuracy
Inactive Publication Date: 2009-05-20
TIANJIN UNIV
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Problems solved by technology
However, sometimes taking into account factors such as grinding efficiency, quality, precision, and cost, the existing abrasive varieties cannot well meet the needs of users.
Method used
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Embodiment 1
[0026] 8% NaO, 15% B 2 o 3 , 60% SiO 2 , 3% Li 2 O, 4% MgO, 7% K 2 O and 3% CaO are mixed evenly, smelted, quenched, dried, pulverized, and sieved to prepare the required binder. Then, 2% binder and 98% 2.5μm corundum were mixed, granulated, heat treated at 1200°C, and sieved to obtain the required sintered corundum abrasive.
Embodiment 2
[0028] 7% NaO, 17% B 2 o 3 , 63% SiO 2 , 2% Li 2 O, 3% MgO, 3% K 2 O, 3% CaO, and 2% ZnO are mixed evenly, melted, quenched, dried, pulverized, and sieved to prepare the required binder. Then, mix 2.5% binder and 97.5% 1.5 μm silicon carbide, granulate, sinter at 1000°C, and sieve to obtain the required sintered silicon carbide abrasive.
Embodiment 3
[0030] 10% NaO, 20% B 2 o 3 , 55% SiO 2 , 4% Li 2 O, 2% MgO, 3% K 2 O, 2% CaO, and 4% ZnO are mixed evenly, melted, quenched, dried, pulverized, and sieved to prepare the required binder. Then, 3.5% binder and 96.5% 1 μm cubic boron nitride were mixed, granulated, sintered at 900° C., and sieved to obtain the desired sintered cubic boron nitride abrasive.
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Abstract
The invention provides an abrasive which is prepared by the steps as follows: 0.5-2.5Mu meter of corundum (95-98 percent) sold in the market, silicon carbide, diamond or cubic boron nitride abrasive micro-powder are mixed with 2-5 percent of ceramic adhesive, thermally disposed under high temperature of 840-1200 DEG C and combined with the abrasive micro-powder by the ceramic combination phase to form the abrasive with microcrystalline structure, wherein, according to the weight percentage, the raw material of the ceramic adhesive comprises 5-20 percent of NaO, 10-25 percent of B2O3, 45-70 percent of SiO2, 13-17 percent 4-5 components of Li2O, MgO, K2O, CaO and ZnO; all raw materials are sequentially mixed, screened, smelted, quenched, dried, crushed, screened to prepare the sintered abrasive, the granularity, classification and application of which are consistent to that of the corundum, carborundum, diamond or cubic boron nitride abrasive. The abrasive changes the internal structure of the abrasive grains, thus changing the processing performance of the abrasive, improving the processing precision, processing quality, processing efficiency, prolonging the service life of the grinder, and reducing the processing cost of the grinding.
Description
technical field [0001] The invention relates to abrasives for grinding, in particular to sintered abrasives and a preparation method. Background technique [0002] Abrasives have been used by humans for thousands of years. In the ancient times of human beings, primitive people have used natural abrasives to sharpen essential tools, bones and tunnel stones, etc. With the development of science and technology and the progress of manufacturing industry, grinding has developed into an important processing method, especially where high precision machining is required. Therefore, the application range of grinding has become wider and wider, and sometimes it has even become the only Processing methods. With the diversification of processing objects and materials, and the increasing difficulty and requirements of processing, new abrasives and varieties have also appeared one after another, such as white corundum, brown corundum, chrome corundum, green silicon carbide, black silico...
Claims
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Application Information
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