摘要
摩擦磨损性能、磨削性能、切削性能对纳米硬质合金实用化具有极其重要意义.应用摩擦磨损试验机研究了纳米硬质合金WC-7Co和WC-10Co的摩擦磨损性能,利用在线电解修整(Electrolytic in Process Dressing,ELID)磨削技术对纳米硬质合金刀具进行了刃磨,并且对Al/SiCp复合材料进行了切削试验,研究了纳米硬质合金刀具的切削性能与刀具磨损机理.结果表明:纳米硬质合金整体摩擦系数低,耐磨性好,WC-10Co的磨损机理表现为鱼鳞状塑性流动;纳米硬质合金磨削加工性较好,磨削机理以塑性去除为主;纳米硬质合金刀具磨损机理为Al/SiCp复合材料中SiC颗粒对刃口断续冲击,其切削实质是断续切削,刀具磨损形式是刃口破损及晶粒脱落.纳米硬质合金刀具适于低速断续切削.
Performances,e.g.friction and wear,grinding and cutting,of nano-cemented carbides（WC-7Co and WC-10Co） are important for its development and potential applications.In this paper,the friction and wear of nano-cemented carbide was evaluated on a CJS111A tribo-meter.Cutting tests on Al/SiCp composite material using the nano-cemented carbide cutter sharpened by ELID（Electrolytic in Process Dressing） grinding were conducted to investigate its cutting performance and abrasive mechanism.The nano-cemented carbide cutter showed lower friction coefficient and higher wear resistance than that of common cemented carbide cutter.The abrasive mechanism of WC-10Co was characterized by fish-scale plastic flow.It was found that the nano-cemented carbide cutter had good grinding performance because the grinding mechanism was mainly contributed by plastic removal of material.An analysis of the used nano-cemented carbide cutter indicated that its abrasion mechanisms was cutting edge breakage and grain pull-out conducted by discontinuous impulsive force.The essence of cutting Al/SiCp is interrupted cutting.The nano-cemented carbide cutter was good for operation of interrupted cut at low speed.
出处
《摩擦学学报》
EI
CAS
CSCD
北大核心
2011年第1期18-23,共6页
Tribology
基金
河南理工大学博士基金资助项目(B2010-30/648436)~~
作者简介
Corresponding author. E - mail： hitgjc@ 163. com, Tel： ＋ 86 - 391 - 3987523.
