摘要
以碳酸氢铵为造孔剂,采用真空热压烧结法制备了多孔铜基结合剂金刚石节块。随着碳酸氢铵含量的增加,金刚石节块的孔隙率逐渐升高,抗弯强度逐渐降低,自锐性提高。用不同孔隙率的金刚石节块磨削硬质合金,观察了磨削后金刚石节块的表面状况,研究了孔隙率与磨削比的关系。结果表明:当孔隙率为20%左右时,金刚石节块的磨削比最高。
Ammonium bicarbonate was used as the pore forming agent and the porous Cu-matrix bond diamond blocks were prepared by the method of vacuum hot pressing sinte-ring.With the increasing content of ammonium bicarbonate,the porosity of diamond blocks increased,but flexural strength decreased and self sharpness improved.The blocks with different porosity were used to grinding cemented carbide,The surface condition of diamond blocks were observed after grinding and the relationship between the porosity and grinding ratio was studied.The results showed that when the porosity was about 20%,the grinding ratio attained the maximum.
出处
《超硬材料工程》
CAS
2015年第5期18-23,共6页
Superhard Material Engineering
基金
郑州市科技攻关项目
单层金刚石钎焊研究(074SSG24110-1)
关键词
碳酸氢铵
多孔金刚石节块
孔隙率
自锐性
磨削比
Ammonium bicarbonate
Porous diamond block
Porosity
Self sharpness
Grinding ratio