保温时间对低温陶瓷/Cu-Fe-Sn基结合剂磨具性能与结构的影响  

Effect of heat preservation on the property and structure of low-temperature vitrified/Cu-Sn-Fe-based bond diamond tool

作　　者：李广锋[1] 侯永改[1] 高元[1] 李文凤[1] 黄庆飞[1] 丁志静[1] 

机构地区：[1]河南工业大学材料科学与工程学院,郑州450001

出　　处：《金刚石与磨料磨具工程》2017年第2期46-49,共4页Diamond & Abrasives Engineering

基　　金：河南省科技厅重点科技攻关(112102210240);河南工业大学研究生教育创新计划(2012YJC76)

摘　　要：采用粉末冶金法制备低温陶瓷/Cu-Fe-Sn基结合剂金刚石磨具。结合材料电子万能试验机、SEM、XRD等检测手段,研究了保温时间对低温陶瓷/Cu-Fe-Sn基结合剂磨具性能与结构的影响。结果表明:当热压烧结保温时间为8min时,低温陶瓷/Cu-Fe-Sn基结合剂磨具有最佳的力学性能(抗弯强度285.6 MPa,冲击强度10.88kJ/m2);保温时间延长促进了低温陶瓷在金刚石表面铺展润湿,保温8min时,低温陶瓷/Cu-Fe-Sn基结合剂可达到最佳的机械嵌合,提高结合强度。Low-temperature vitrified/Cu-Fe-Sn-based bond diamond tool was prepared by the method of powder metallurgy. Bending strength and impact strength of sam tester and their micro-topography were analyzed by using XRD an pl d es were tested by using mechanical SEM. Results show that when the heat preservation is 8 rain, the mechanical property of vitrified/Cu-Fe-Sn-based bond diamond tool reaches its maximum value, namely bending strength 285.6 MPa and impact strength 10.88 kJ/m2 Prolonged holding time could promote low-temperature ceramic spreading on diamond surface. When the holding time is 8 min, the low temperature ceramic /Cu-Fe-Sn based binder can achieve the best mechanical fit and improve the bonding strength.

关 键 词：低温陶瓷 金刚石工具 自锐性 微观结构 

分 类 号：TG74[金属学及工艺—刀具与模具]