| Related citation: | Jianfei Sun,Daxi Du,Zixuan Ding,Kai Wang,Dashan Bai,Wuyi Chen.Analysis on the Wear Performances of Cemented Carbide Tools Containing Ti in the Coatings When Machining Ti-6Al-4V Alloys[J].Journal of Harbin Institute Of Technology(New Series),2021,28(6):14-22.DOI:10.11916/j.issn.1005-9113.2020038. |
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| Author Name | Affiliation | | Jianfei Sun | School of Mechanical Engineering and Automation,Beihang University,Beijing 100191, China
Collaborative Innovation Center of Advanced Aero-Engine,Beijing 100191,China
Beijing Engineering Technological Research Center of High-Efficient and Green CNC, Machining Process and Equipment,Beijing 100191,China | | Daxi Du | Beijing Aerospace Petrochemical Technology and Equipment Engineering Limited Corporation,Beijing 100166,China | | Zixuan Ding | School of Mechanical Engineering and Automation,Beihang University,Beijing 100191, China | | Kai Wang | School of Mechanical Engineering and Automation,Beihang University,Beijing 100191, China | | Dashan Bai | School of Mechanical Engineering and Automation,Beihang University,Beijing 100191, China | | Wuyi Chen | School of Mechanical Engineering and Automation,Beihang University,Beijing 100191, China
Collaborative Innovation Center of Advanced Aero-Engine,Beijing 100191,China |
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| Abstract: |
| Because of the high affinity of the same element Ti, cemented carbide tools containing Ti seem to be non-optimal in machining titanium alloys. However, in practice, cemented carbide tools containing Ti are still widely used in machining titanium alloys. Cutting experiments were conducted in order to systematically explain the contradictions between the practice and theory. The diffusion process between titanium alloys and the cemented carbide tools was analyzed by auger electron spectroscopy detecting the cutting regions. It was also analyzed by Ti/Co diffusion behavior simulated by molecular thermodynamics. The experimental results and the simulation results showed that the mutual diffusion of Ti/Co atoms was the major reason for the diffusion wear. The dissolution-diffusion wear was one of the main wear mechanisms for the cemented carbide tools containing Ti in the coatings. Moreover, four types of cemented carbide tools and two other types of cermet tools were used to machine the Ti-6Al-4V alloys at different cutting speeds to further verify the high affinity of cutting tools containing Ti in the substrate/coating. The verification experiments results showed that the cemented carbide tools containing Ti generally cannot be used for machining titanium alloys, but could show less affinity in the cutting regions with reasonable cutting conditions. |
| Key words: wear mechanisms Ti/Co diffusion molecular thermodynamics simulation cemented carbide tool containing Ti Ti-6Al-4V alloys |
| DOI：10.11916/j.issn.1005-9113.2020038 |
| Clc Number:TG711; TH16; TH117.1 |
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| Descriptions in Chinese: |
| 含钛涂层硬质合金刀具在加工Ti-6Al-4V合金时的磨损性能分析 孙剑飞1,2,3，杜大喜4，丁梓轩1，王凯1，白大山1，陈五一1,2 （1.北京航空航天大学 机械工程及其自动化学院，北京100191； 2.先进航空发动机协同创新中心，北京100191，中国； 3.北京市高效绿色数控加工工艺与装备工程技术研究中心，北京100191，中国； 4.北京航天石化技术装备工程有限公司，北京100166，中国） 摘要：由于钛元素的高亲和力，在加工钛合金时含钛涂层的硬质合金刀具似乎不是最佳的选择。然而在实践中，含钛涂层硬质合金刀具仍然广泛应用于钛合金的加工。为了系统的解释实践与理论之间的矛盾，进行了切削实验。使用俄歇电镜扫描切削区域来解析钛合金与硬质合金刀具之间的扩散过程。并通过分子热力学模拟Ti/Co扩散行为对这一过程进行仿真。实验和仿真结果表明，Ti/Co原子的相互扩散是导致扩散磨损的主要原因。溶解-扩散磨损是含钛涂层硬质合金刀具的主要磨损机制之一。此外，采用四种硬质合金刀具和另外两种金属陶瓷刀具以不同的速度切削Ti-6Al-4V合金，进一步验证含钛刀具在基体和图层中的高亲和力。实验结果表明，含钛硬质合金刀具一般不能用于钛合金的切削加工，但在合理的切削条件下，刀具与工件的亲和力较低。 关键词：磨损机理；Ti/Co扩散；分子热力学模拟；含钛硬质合金刀具；Ti-6Al-4V钛合金 |
