In order to study the effect of particle size of ceramic binder on the performance of diamond grinding wheels,four kinds of samples with different particle sizes were pre-pared from ceramic binder and diamond.Firstly,thermal analysis of binder with different particle sizes was carried out to find the optimum sintering temperature.Then,the ben-ding strength,porosity and fracture microstructure of diamond wheel specimens were compared and analyzed.The experimental results show that:the glass transition tempera-ture of the ceramic binder increases with the diameter of the binder,which are 577.9 ℃,594.4 ℃,604.5 ℃ and 633.5 ℃.Respectively,the sintering temperature of diamond grinding wheel samples are 650 ℃,670 ℃,680 ℃,710 ℃.When the particle size ratio of binder to diamond increases from 1/45 to 1/3,the bending strength of the specimen increases first,from 92.9 MPa to 98.5 MPa,and then decreases to 85.6 MPa.Accordingly,the porosity of the samples increase from 12.6％to 22.3％.When the ratio of ceramic binder to dia-mond particle size is 1/15,the node has the best comprehensive performance,the sintering temperature is 670 ℃,the bending strength is 98.5 MPa,and the porosity is 13％.
关键词
陶瓷结合剂粒度/金刚石砂轮/加工性能
Key words
particle size of vitrified binder/diamond wheel/processing performance
维普
万方数据