车削Inconel 718时涂层硬质合金刀具自组织过程  

Self-organization of Coated Carbide Insert in Turning of Inconel 718

作　　者：宋新玉[1] 刘永洪[1] 

机构地区：[1]潍坊学院

出　　处：《工具技术》2015年第1期29-32,共4页Tool Engineering

基　　金：山东省优秀中青年科学家科研奖励基金(BS2011ZZ019)

摘　　要：根据不可逆热力学的非平衡态下结构稳定与失效原理,当系统熵产生数达到一定值时,系统将会出现"行为临界点"。越过这种临界点后系统将离开原来的热力学无序分支,形成稳定的有序的自组织结构。采用硬质合金刀具对镍基合金Inconel 718进行了车削试验,分析了不同切削条件下形成积屑瘤、切屑流动带、氧化层和粘结层的磨损机理。通过热力学刀具磨损自组织原理,对金属切削工程中刀具的摩擦、磨损进行研究。研究结果表明高速切削镍基高温合金Inconel 718的过程中,积屑瘤、切屑流动带、氧化层和粘结层是刀具形成新的有序的自组织结构的体现。试验和理论分析证实,高速切削镍基高温合金Inconel 718过程中刀具的磨损过程就是非平衡态热力学结构稳定与失效的演变过程。By the theory of irreversible thermodynamics,, the system will be stable or failure in no equilibrium state. When the entropy production of the system reaches a certain value, ＂behavior of critical point＂ appears. Beyond this criti- cal point, the system will leave the original thermodynamic disorderly branch. Formation of ordered and stable self - organ- ized structure is followed. Carbide tool is used for turning of Inconel 718. The friction films of tool wear,including built - up edge, oxide layer structures ,flow zone and adhesive layer are analyzed. Experimental evidence and theoretical analysis shows ： the cutting process is evolution process of structural stability or failure of non equilibrium thermodynamics in the cut- ting tool wear in high - speed turning of Inconel 718.

关 键 词：高速车削 镍基合金 自组织 磨损机理 

分 类 号：TG506[金属学及工艺—金属切削加工及机床]