纳米碳化钒/铬复合粉末对cBN磨具用陶瓷结合剂性能的影响  

Influence of Nano VC/Cr_2C_3 on Composite Powder on Performance of Ceramic Bond for cBN Grinding Tool

作　　者：邱文星 赵志伟[1] 陈飞晓 袁永帅 李静[1] 刘晓慧 

机构地区：[1]河南工业大学材料科学与工程学院,河南郑州450001

出　　处：《超硬材料工程》2017年第5期34-37,共4页Superhard Material Engineering

摘　　要：为了探索在不同烧结温度下纳米碳化钒/铬复合粉末对cBN磨具用陶瓷结合剂性能的影响,实验选用SiO_2-Na_2O-Al_2O_3-B_2O_3-CaO系统作为基础陶瓷结合剂体系,向陶瓷玻璃料中加入6%质量分数的纳米碳化钒/铬复合粉末并分别在微波烧结炉中以不同温度烧结制得纳米陶瓷结合剂。实验采用LCP-1差热膨胀仪、CMT4504型电子拉伸试验机、Stemi2000-C金相显微镜等测试分析仪器,分别对所得结合剂进行差热分析、抗折强度、显微结构分析等性能检测。实验结果表明:纳米碳化钒/铬复合粉末对结合剂性能有很大影响;加入6%纳米碳化钒/铬复合粉末能使陶瓷结合剂最大抗折强度从18.32MPa(550℃)增大到44.44MPa(600℃);纳米碳化钒/铬可以减小陶瓷结合剂的密度,以700℃的温度烧结时,结合剂密度从2.165g/cm^3减小到1.256g/cm^3;以600℃烧结时,6%纳米碳化钒/铬复合粉末能使结合剂的流动性从145.8%增大为154.8%。In order to study the influence of nano VC/Cr2C3 on composite powder on performance of ceramic bond for cBN grinding tool at different sintering temperature,ceramic bond was prepared in the experiment with SiO2-Na2O-Al2O3-B2O3-CaO system as the basic ceramic bond system,and nanoVC/Cr2C3 on composite powder of 6% mass fraction was added into the ceramic frit and then sintered respectively in the microwave sintering furnace under different temperature.Performance tests of the prepared bond such as differential thermal analysis,bending strenth and microstructure analysis were carried out respectively by analytical instruments such as LCP-1 differential dilatometer,CMT4504 electron-tensile tester and Stemi2000-C metallurgical microscope.Result shows that nanoVC/Cr2C3 on composite powder has significant influence on performance of ceramic bond;adding 6% of nano VC/Cr2C3 on composite powder failed to increase the maximum bending strenth of ceramic bond from 18.32 MPa（550℃） to 44.44 MPa（600℃）;nanoVC/Cr2C3 on can reduce the density of ceramic bond from 2.165 g/cm^3 to 1.256 g/cm^3 under the sintering temperature of 700℃;6% of nano VC/Cr2C3 on composite powder failed to increase the flowability of the bond from 145.8%to 154.8%.

关 键 词：纳米碳化钒/铬粉末 cBN用陶瓷结合剂 不同温度 

分 类 号：TG74[金属学及工艺—刀具与模具]