文章摘要
杜丽业,邱联昌,杜勇,等.不同后处理对MT-TiCN涂层刀具组织与切削性能的影响[J].精密成形工程,2017,9(3):83-88.
DU Li-ye,QIU Lian-chang,DU Yong,et al.Influences of Different Post-treatments on Microstructure and Cutting Performance of MT-TiCN Coated Cutting Tool[J].Journal of Netshape Forming Engineering,2017,9(3):83-88.
不同后处理对MT-TiCN涂层刀具组织与切削性能的影响
Influences of Different Post-treatments on Microstructure and Cutting Performance of MT-TiCN Coated Cutting Tool
投稿时间:2017-04-28  修订日期:2017-05-10
DOI:10.3969/j.issn.1674-6457.2017.03.016
中文关键词: MT-TiCN  涂层  热处理  湿喷砂  刃口处理  切削性能
英文关键词: MT-TiCN  coating  heat treatment  wet blasting  brushing  cutting performance
基金项目:2015年工业转型升级强基工程高端装备用高性能硬质合金刀具涂层技术(TC150B5C0/31)
作者单位
杜丽业 中南大学 粉末冶金国家重点实验室长沙 410083 
邱联昌 1.中南大学 粉末冶金国家重点实验室长沙 4100832.赣州澳克泰工具技术有限公司江西 赣州 341000 
杜勇 中南大学 粉末冶金国家重点实验室长沙 410083 
钟志强 1.中南大学 粉末冶金国家重点实验室长沙 4100832.赣州澳克泰工具技术有限公司江西 赣州 341000 
史海东 赣州澳克泰工具技术有限公司江西 赣州 341000 
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中文摘要:
      目的 研究不同后处理工艺(包括热处理、湿喷砂和刃口处理)对MT-TiCN涂层组织与刀片切削性能的影响。方法 采用中温化学气相沉积技术在硬质合金刀片上制备TiCN涂层;利用光学显微镜(OM)、扫描电子显微镜(SEM)、X射线衍射仪(XRD)、纳米压痕仪分析MT-TiCN涂层的组织形貌、相结构、硬度和弹性模量;在AISI 4340合金钢上进行车削试验。结果 MT-TiCN涂层呈柱状晶结构,涂层沿(422)晶面方向择优生长,且织构系数达5.5;涂层表面和断口平均硬度分别为26.6 GPa和30.7~31.8 GPa,平均弹性模量分别为528.6 GPa和467.7~494.4 GPa;在连续车削条件下,经湿喷砂处理的涂层刀片切削性能最佳;在低切深、低进给断续车削工况下,湿喷砂后又经热处理和刃口处理的涂层刀片使用寿命最长;湿喷砂后再进行热处理,对刀具的切削性能影响较小。结论 湿喷砂和热处理对MT-TiCN涂层组织的影响较小;不同后处理工艺对涂层刀具切削性能的影响较大,这主要是因为刃口处理会减小涂层厚度同时提高涂层韧性。
英文摘要:
      The paper aims to elucidate influences of different post treatments (heat treatment, wet blasting and brushing) on microstructure and cutting performance of MT-TiCN coating. The MTCVD was adopted to prepare TiCN coatings on the carbide blade; optical microscope (OM), scanning electron microscopy (SEM), X-ray diffraction (XRD), nano-indentation tester were used for the characterization of microstructure, phase structure, hardness and elastic modulus; turning tests were applied on alloyed steel AISI 4340. MT-TiCN coating had a columnar microstructure and highly oriented at (422) plane with a texture coefficient up to 5.5; the average hardness of the surface and the cross section were 26.6 GPa and 528.6 Gpa, respectively; and the average elastic modulus were 30.7~31.8 GPa and 467.7~494.4 Gpa, respectively; the coated blade after wet blasting treatment had the best cutting performance under continuous cutting; the coated blade treated by the combination of heat treatment, wet blasting and brushing had the longest service life during interrupted turning under dry conditions with small depth of cut and feed rate. The heat treatment after wet blasting had few influences on cutting performance of cutting tools. Wet blasting and heat treatment have few influences on the MT-TiCN coating. Different post treatment processes have great influences on cutting performance of coated cutting tools, because the brushing reduces the thickness and improves the toughness of t coating.
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