摘要
烧结金刚石工具对磨粒把持力不足,而自蔓延反应的瞬时高温使胎体金属和金刚石表面发生化学冶金结合,可提高磨粒把持力。利用Al-Ti自蔓延反应制备多层金刚石雕刻磨头,并测量其孔隙率。使用扫描电镜和能谱分析仪对自蔓延反应后节块断面形貌和胎体—磨粒结合界面进行综合分析。结果表明,Al-Ti含量过多会导致节块骨架坍塌;胎体—金刚石结合界面出现Ti元素的偏析;Al-Ti自蔓延反应的瞬时高温可以使活性元素Ti与金刚石表面发生化学冶金结合,使胎体对金刚石磨粒的把持力增大;自蔓延反应后的金刚石平均抗压强度下降。
The grain holding force of conventional sintered diamond tools is insufficient, and it can be increased by SHS method because of the metallurgical bonding in SHS reaction. The porosity of the diamond grinding head made from Al- Ti SHS is measured, and the cross-section of the agglomerate and the interface of the diamond and the matrix are investigated by SEM and EDS. The results show that, too high content of Al-Ti leads to the collapse of the matrix, and there exists Ti segregation between the diamond and the matrix. The bonding of Ti and diamond resulting from Al-Ti SHS makes the holding force increase, and the average compressive strength of the diamond decreases after SHS reaction.
出处
《工具技术》
北大核心
2017年第9期35-38,共4页
Tool Engineering
基金
江苏省产学研合作前瞻性联合研究项目(BY2016003-15
BY2015003-02
BY2014003-18
BY2014003-02
BY2014003-11
BY2013003-15
BY2013003-14
BY2013003-04)
江苏省产业技术研究院产业重大原创性技术创新项目(BO2015005)
