TiAlN,TiAlSiN涂层的制备及其切削性能

发布时间：2018-01-26 14:52

本文关键词： 磨损切削性能失效 TiAlN TiAlSiN　出处：《表面技术》2017年01期 　论文类型：期刊论文

【摘要】：目的研究TiAlN及TiAlSiN涂层的微观结构及力学性能,以及硬质合金涂层刀具切削SUS304不锈钢的切削性能及磨损行为。方法采用阴极电弧离子镀技术在硬质合金试片及铣刀上分别制备纳微米TiAlN及TiAlSiN涂层。通过X射线荧光测量系统测量涂层的厚度,用扫描电镜(SEM)观察涂层表面形貌,用能谱仪(EDAX)分析涂层元素成分,用X射线衍射(XRD)分析涂层晶相结构,用纳米压痕仪表征涂层硬度,用洛氏硬度计定性测量涂层结合力,通过高速铣削试验探究涂层刀具的切削性能及磨损行为。结果 TiAlN及TiAlSiN涂层的厚度分别为3.32μm和3.35μm,表面致密、光滑,高分辨率(20 000×)下观察到涂层表面有液滴、针孔及凹坑存在。Si元素促进了Ti N(200)晶相的生长,晶粒尺寸减小,硬度增加。TiAlN及TiAlSiN涂层的显微硬度分别为29.6 GPa及37.7 GPa,结合力分别满足VDI-3198工业标准的HF3和HF1等级。在130 m/min的高速切削条件下,TiAlSiN涂层刀具寿命约为未涂层刀具的5倍,TiAlN涂层刀具的1.5倍。结论 Si掺杂制备的TiAlSiN涂层具有高的硬度及良好的抗粘附性,更适用于不锈钢材料的高速切削加工。
[Abstract]:Objective to study the microstructure and mechanical properties of TiAlN and TiAlSiN coatings. The cutting performance and wear behavior of cutting SUS304 stainless steel with cemented carbide coated tools were studied. Methods Nano-micron TiAlN and T were prepared on cemented carbide test discs and milling cutters by cathodic arc ion plating. IAlSiN coatings. Measurement of coating thickness by X-ray fluorescence measurement system. The surface morphology of the coating was observed by scanning electron microscopy (SEM), the elemental composition of the coating was analyzed by EDAX, and the crystal structure of the coating was analyzed by X-ray diffraction (XRD). The coating hardness was characterized by nano-indentation instrument and the coating adhesion was qualitatively measured by Rockwell hardness meter. The cutting performance and wear behavior of coated tools were investigated by high speed milling test. Results the thickness of TiAlN and TiAlSiN coatings were 3.32 渭 m and 3.35 渭 m, respectively. Liquid droplets were observed on the surface of the coating under smooth and high resolution (20 000 脳). The crystal phase growth was promoted by the presence of .Si element in pinholes and pits, and the grain size decreased. The microhardness of TiAlN and TiAlSiN coatings were 29.6 GPa and 37.7 GPa, respectively. The binding force meets the HF3 and HF1 grades of VDI-3198 industry standard, respectively. Under the condition of high speed cutting of 130m / min. The life of TiAlSiN coated tool is about 5 times as long as that of uncoated tool. Conclusion the TiAlSiN coating prepared by Si doping has high hardness and good adhesion resistance, which is more suitable for high speed cutting of stainless steel.
【作者单位】：上海应用技术大学机械工程学院;
【基金】：校协同创新基金重点项目(10120K158004-XTCX2015-4) 国家自然科学基金资助项目(51475311)~~
【分类号】：TG174.4;TG71
【正文快照】： Received:2016-10-08;Revised:2016-11-27涂层技术是将机械制造与新材料结合在一起的绿色应用技术。随着1980年Ti N涂层的问世,涂层在工业领域的应用得到了快速的发展,一批批新的涂层工艺及涂层种类不断涌现[1]。二元涂层如Cr N,Cr C,Ti C,Al2O3,Ta C等,三元涂层如Ti CN,Al Ti

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