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Analysis of the influence quantities on the adhesion of CVD diamond layers on carbide tools

Analysis of the influence quantities on the adhesion of CVD diamond layers on carbide tools
CVD金刚石层对硬质合金刀具附着力的影响量分析
批准号:
267184104
负责人:
Professor Dr.-Ing. Eckart Uhlmann
金额:
$0.0万
依托单位国家:
德国
项目类别:
Research Grants
财政年份:
2015
资助国家:
德国
项目状态:
已结题
起止时间:
2014-12-31 至 2021-12-31

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中文摘要
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英文摘要
During the first funding period of this project, the functional profile of cobalt- and nickel-bonded, novel niobium carbide (NbC) cutting materials was developed, which were produced using different sintering processes. The material properties of these NbC nuances were tested and compared with a commercially available tungsten carbide cobalt (WC-6Co, submicron grain). Furthermore, the NbC hard metal nuances were used in the machining of various materials and the wear behavior was compared with the WC-6Co-tools.It could be shown that the new cutting material achieves longer tool life compared to WC-6Co in dry turning of hardened steel 42CrMo4 + QT and also in turning of carbon steel C45E using the same process parameters. It was found that during the machining of C45E with a high cutting speed of vc = 150 m/min, significantly less crater wear occurs, which is due to the lower solubility of NbC in solid metals such as iron. The tool life advantages of the NbC grades increase with increasing cutting speed. Despite the lower hardness of the NbC cutting tool at room temperature (RT), higher cutting time was achieved during the machining of hardened steel, which is attributable to a higher hot hardness of the NbC compared to WC-6Co. During the milling of the aluminum alloy AlSi9Cu4Mg, similar tool lifetime as with WC-6Co could be achieved, although the NbC nuances so far still have a lower toughness.Up to now, the NbC nuances have been produced in the laboratory scale as well as for the most part by means of the sintering method Spark Plasma Sintering (SPS), which is not customary in the industry. In the application for continuation, therefore, the industrially relevant production methods of the NbC cutting materials are increasingly focussed with a further increase in hardness, strength and toughness values as well as prevention of grain growth. By adapting the micro- and macro-geometry of the tools to the wear behavior per workpiece material, the NbC nuances are used in the turning and milling processing of a wide range of materials analyzing the behavior in cutting process. A parameter study is carried out for each material and the influence of different cooling methods on the tool life is investigated. The causes of wear are determined using different analytical methods. Finally, an analytical model for the description of the application and wear behavior is prepared, taking into account different production methods and binder materials of the NbC nuances.
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国内基金
海外基金
NbZrTi基多主元合金中化学不均匀性对辐照行为的影响研究
  • 批准号:
    12305290
  • 项目类别:
    青年科学基金项目
  • 资助金额:
    30.00万元
  • 批准年份:
    2023
  • 负责人:
    苏钲雄
  • 依托单位:
NPC1调控肾上腺皮质激素分泌影响代谢稳态的机制研究
  • 批准号:
    82370796
  • 项目类别:
    面上项目
  • 资助金额:
    49.00万元
  • 批准年份:
    2023
  • 负责人:
    蒋怡然
  • 依托单位: