The friction mechanics model within chip-tool-workpiece dual interfaces for cutting nickel-based superalloy at the cooling and lubrication conditions of the three forms oil-on-water mist in wide temperature range
The friction mechanics model within chip-tool-workpiece dual interfaces for cutting nickel-based superalloy at the cooling and lubrication conditions of the three forms oil-on-water mist in wide temperature range
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DOI：
10.1007/s00170-022-10630-4
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发表时间：
2023-01
期刊：
影响因子：
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通讯作者：
Furong Ma;L. Tang;Jihui Zhang;Y. Hu;Baodong Li;Yongji Sun
中科院分区：
文献类型：
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作者：
Furong Ma;L. Tang;Jihui Zhang;Y. Hu;Baodong Li;Yongji Sun
镍基高温合金以其优异的高温性能在航空发动机等关键机械轴承部件中得到了广泛的应用，但其加工性一直不理想。为了提高加工效率、降低成本、减少环境污染，本文利用PVD TiAlN涂层硬质合金刀具，在宽温区(− 30 ~ 150℃)(高温水上油雾(150℃)、常温水上油雾(20℃)和低温水上油雾(− 30℃))的冷却和润滑条件下，建立了S难加工镍基高温合金Inconel718的切屑-刀具-工件双界面摩擦力学模型。同时研究了切削速度、切深、进给量对三向切削力、切屑-刀具-工件双界面摩擦系数、切屑-刀具界面法向应力和切向应力的影响规律和机理。结果表明，在高温水上油雾(HTOoW)和常温水上油雾(NTOoW)条件下，切屑-刀具界面的摩擦系数最小，而在常温水上油雾(NTOoW)条件下的摩擦系数最大。低温水上油雾(LTOoW)对材料的应变硬化、应变速率硬化和热软化的影响最为显著。
Nickel-Based superalloy has been extensively applied in the critical mechanical bearing components, such as aeroengine owing to its excellent performance at high temperature, but its machinability has always been dissatisfied. In order to improve processing efficiency, reduce cost, and decrease environmental pollution, in this paper, the friction mechanics model within chip-tool-workpiece dual interfaces was established in turning of S-type difficult-to-machine nickel-based superalloy Inconel 718 utilizing the PVD TiAlN coated carbide tool under the cooling and lubrication conditions of three forms oil-on-water mist in wide temperature range (− 30 ~ 150 ℃) (high temperature oil-on-water mist (150 ℃), normal temperature oil-on-water mist (20 ℃), and low temperature oil-on-water mist (− 30 ℃)). Meanwhile, the influence law and mechanism of the cutting speed, depth of cut, and feed on the three-way cutting forces, friction coefficient between chip-tool-workpiece dual interfaces, and normal stress and tangential stress in chip-tool interface have been studied. The results showed that the lowest and highest friction coefficient within chip-tool interface was obtained at the conditions of the high temperature oil-on-water mist (HTOoW) and the normal temperature oil-on-water mist (NTOoW), respectively. The most notable influence of the low temperature oil-on-water mist (LTOoW) on the strain hardening, strain rate hardening, and thermal softening of the materials occurred.