WC-Co硬质合金塑形域加工去除机理的研究  

Removal Mechanisms of WC-Co Cemented Carbide in Ductile-Regime Machining

作　　者：王硕 吴兵 都建标 宗文俊[1] Wang Shuo;Wu Bing;Du Jianbiao;Zong Wenjun(Center for Precision Engineering,Harbin Institute of Technology,Harbin Heilongjiang 150001,China)

机构地区：[1]哈尔滨工业大学机电工程学院精密工程研究所,黑龙江哈尔滨150001

出　　处：《硬质合金》2024年第2期89-96,共8页Cemented Carbides

基　　金：国防基础科研科学挑战计划(TZ2018006)。

摘　　要：因硬质合金极高的硬度和稳定性,其超精密加工仍然是玻璃透镜模压模具生产中重要且成本高昂的一环。主流的塑形域加工相关技术在硬质合金上的应用并不尽人意。本文通过纳米压痕测试、维氏压痕测试、单点金刚石车削、变切深刻划等实验方法,研究了WC-Co硬质合金的去除机理。首先,根据车削结果和观察讨论了传统塑形域加工理论在硬质合金上应用的有效性;其次,分析了机械加工过程中表面可能出现的微观缺陷和控制方法;最后,探索了减少WC晶粒破碎的临界切削参数,并在此基础上进行单点金刚石车削,证实了临界切削参数控制加工表面微观缺陷的有效性。Due to the extremely high hardness and stability of cemented carbide,its ultra-precision machining is still vital and costly in the manufacturing of glass lens molds.The application of mainstream ductile-regime machining and other technologies on cemented carbide is not satisfying.In this study,nano-indentation,Vickers indentation,single-point diamond turning,variable depth cutting,and other experimental methods were used to explore the removal mechanisms of cemented carbide WC-Co.Firstly,the effectiveness of applying traditional ductile-regime machining theory on cemented carbide was discussed according to the results of turning and following observations.Then,the micro-defects that may appear on the surface during machining and the control methods were analyzed.Finally,the critical turning parameters to reduce WC grain breaking were explored,and a single-point diamond turning process was conducted to verify the effectiveness of critical cutting parameters in controlling micro-defects on the surface during machining.

关 键 词：硬质合金 塑形域加工 单点金刚石车削 断裂韧性 

分 类 号：TG135.5[一般工业技术—材料科学与工程]