结合剂粒度对低温陶瓷结合剂SG砂轮性能的影响

Influence of bond particle size on performance of low-temperature vitrified bond SG grinding wheel

研究了结合剂粒度对低温陶瓷结合剂SG砂轮性能的影响。实验结果表明，在传统生产工艺和生产成本基本不变的情况下，采取以下措施，砂轮性能可得到不同程度的提高：（1）结合剂过120目筛与400目筛相比，抗折强度由19．85MPa提高到21．62MPa，提高了8．92％；抗拉强度由38．7MPa提高到54．8MPa，提高了41．6％；硬度平均提高近一级；（2）黏土、长石等结合剂原材料球磨并过120目筛后，炼制的结合剂过180目筛、320目筛、400目筛后所得的结合剂相比，结合剂自身性能有很大的变化，主要表现在：①结合剂的耐火度由768℃降低到680℃，②烧结范围由70℃降低到40℃，③结合剂的流动性由145Voo增加到210％；（3）在一定烧成制度下，结合剂粒度控制在180～320目范围内，有利于低温陶瓷结合剂砂轮磨削性能的提高。

The effect of particle size on performance of low-temperature vitrified bond SG grinding wheel is studied. Results show that wheel performance could be enhanced using the following measures without changing the conventional production process and production costs： （1） if sieved through a 120 mesh sieve other than a 400 one, bond＇ s performance is increased, such as bending strength from 19.85 MPa to 21.62 MPa （an 8.92 % increase）, the tensile strength from 38.7 MPa to 54.8 MPa （a 41.6 % increase） and hardness increased by one degree; （2） if sieved through a 120 mesh sieve other than 180^#, 320^# or 400^# ones, clay and feldspar＇s properties are largely changed, including refractoriness of bond from 768 ℃ to 680 ℃, sintering temperature from 70 ℃ to 40 ℃ and liquidity from 145% to 210% ; （3） under certain sintering conditions, it is good for the performances of the low-temperature vitrified bond SG grinding wheel to control the bond size between 180^# to 320^# .