摘要
为研究陶瓷结合剂粒度尺寸对金刚石砂轮性能的影响,以陶瓷结合剂和金刚石为原料,设计4种不同陶瓷结合剂粒度样品来制备试样条。首先对不同粒度胎体进行热分析,找到烧结温度,然后对相应金刚石砂轮试样条的抗弯强度、气孔率以及样品断口显微组织进行对比分析。试验结果表明:随着胎体粒径变粗,胎体的玻璃转化温度随之提高,分别为577.9℃、594.4℃、604.5℃和633.5℃;相应地,金刚石砂轮试样烧结温度分别为650℃,670℃,680℃和710℃。当结合剂与金刚石的粒度尺寸比值由1/45增大到1/3时,试样的抗弯强度呈现先升高后降低的趋势,由92.9 MPa升高到98.5 MPa,后又降低到85.6 MPa;相应地,试样的气孔率呈现出升高的趋势,由12.6%提高到22.3%。当陶瓷结合剂与金刚石粒径比值为1/15时,节块的综合性能最佳,其烧结温度为670℃,抗弯强度为98.5 MPa,气孔率为13%。
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 prepared 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 bending strength,porosity and fracture microstructure of diamond wheel specimens were compared and analyzed.The experimental results show that:the glass transition temperature 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 diamond particle size is 1/15,the node has the best comprehensive performance,the sintering temperature is 670°C,the bending strength is 98.5 MPa,and the porosity is 13%.
作者
李亚朋
孟繁鹏
尹翔
刘一波
刘伟
刘金美
LI Yapeng;MENG Fanpeng;YIN Xiang;LIU Yibo;LIU Wei;LIU Jinmei(Beijing gang yan diamond products company,Beijing 102200,China;Advanced Technology&Materials Co.,Ltd,Beijing 100081,China)
出处
《超硬材料工程》
CAS
2024年第6期17-22,共6页
Superhard Material Engineering
关键词
陶瓷结合剂粒度
金刚石砂轮
加工性能
particle size of vitrified binder
diamond wheel
processing performance
