摘要
利用微波烧结技术制备了Al_2O_3/TiC陶瓷刀具AT33,通过连续干车削淬硬钢40Cr(50±2HRC)研究了刀具的切削性能和磨损机理,同时与热压烧结而成的Al_2O_3/TiC陶瓷刀具LT55和硬质合金刀具YS8作切削性能上的对比。体视显微镜,扫描电镜(SEM)和能谱仪(EDS)被分别用来测量刀具后刀面磨损量,刀具形貌的观察以及成分分析。实验结果表明,在切削淬硬钢40Cr时,AT33刀具在三种切削速度(173/260/350m/min)下的刀具寿命都要高于LT55和YS8。刀具的磨损机理主要是磨粒磨损和粘结磨损。微波烧结制备的陶瓷刀具展现了良好的抗磨损能力。
Al2O3/ TiC composite ceramic tool（ AT33） was fabricated by microwave sintering,and the cutting performance and wear mechanisms were studied when dry-machining hardened steel 40Cr（ 50 ±2HRC）,in comparison with those of LT55（ Al2O3/ TiC） produced by hot-pressing technology and YS8.Stereomicroscope,scanning electron microscopy（ SEM） and energy dispersive X-ray spectroscopy（ EDS）were applied for the measurements of flank wear value,observations of tool faces and analyses of elements deposited on tool faces. The results showed that AT33 had longest tool life than that of LT55 and YS8 at any given cutting speeds. Wear mechanisms of AT33 were mainly abrasion and adhesion. Microwave sintered ceramic tools showgreat wear resistance.
出处
《组合机床与自动化加工技术》
北大核心
2017年第3期137-139,共3页
Modular Machine Tool & Automatic Manufacturing Technique
基金
国家自然科学基金(51505227)
江苏省自然科学基金(BK20150783)
中央高校基本科研业务费专项资金(30915118809)
作者简介
张勇(1992-),男,安徽宿州人,南京理工大学硕士研究生,研究方向为先进制造工艺与装备,(E-mail)zhangyongjy@163.com.
