高速铣削高温合金涂层刀具表面自组织结构研究

Study on Surface Self-organization Structure of Coated Tool in High-speed Milling Superalloy

在高速铣削高温合金GH2132的过程中,刀具磨损严重、刀具寿命较短。在一定条件下,涂层刀具在稳定磨损阶段能够生成耐磨损或自润滑的氧化物薄膜层(自组织结构),此结构能够起到提高刀具切削性能、延缓磨损以及延长使用寿命的作用。基于此,进行高速铣削涂层刀具表面自组织结构研究,以提高刀具寿命。结果表明:高速铣削高温合金GH2132时,PVD-AlTiN硬质合金刀具表面自组织结构稳定存在的条件为F_(x)=90~105 N、F_(y)=115~168 N、F_(z)=410~510 N、σ_(s)=-735~-873 MPa。研究结果为涂层刀具加工高温合金提供了参考,并且有助于绿色智能制造。

In the process of high-speed milling superalloy GH2132,the tool wear is serious and the tool life is short.Under certain conditions,the coated tool can generate a wear-resistant or self-lubricating oxide film layer in the stable wear stage,that is,self-organization structure,which can improve the cutting performance,delay the wear and prolong the service life of the tool.Based on this,self-organization structure on coated tool surface in high-speed milling was studied to improve tool life.The results show that in high-speed milling superalloy of GH2132,the stability existence conditions of surface self-organization structure of PVD-AlTiN carbide cutting tools are F_(x)=90~105 N,F_(y)=115~168 N,F_(z)=410~510 N,σ_(s)=-735~-873 MPa.The results provide reference for coated tool milling superalloy and contribute to green intelligent manufacturing.