Broaching of Inconel 718 with cemented carbide

Klocke, Fritz; Vogtel, P.; Gierlings, Sascha; Lung, Dieter; Veselovac, D.

doi:10.1007/s11740-013-0483-1

Cited by 33 publications

(16 citation statements)

References 5 publications

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“…However, the use of HSS allows only cutting speeds of up to v c = 5 m/min. Therefore, the implementation of cemented carbide as cutting material for broaching tools increases, enabling a substantial increase in cutting speeds due to a higher wear-resistance [117]. Moreover, the cutting forces are reduced due to the higher cutting speeds compared to HSS.…”

Section: Ni-based Superalloysmentioning

confidence: 99%

High performance cutting of advanced aerospace alloys and composite materials

M’Saoubi¹,

et al. 2015

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Section: Ni-based Superalloysmentioning

confidence: 99%

High performance cutting of advanced aerospace alloys and composite materials

M’Saoubi¹,

et al. 2015

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“…Even though some investigations have paid attention to the surface integrity of broached components, the studied materials rarely included Inconel 718. Klocke et al [23] investigated the broaching of Inconel 718 with cemented carbide cutting tools, and compared its performance with that produced by traditional high speed steels in terms of tool wears, cutting forces, and surface integrity. An overview of the plastically deformed microstructure produced by the broaching process was given by using optical microscope, but the residual stresses generated at the broached surface were not covered in the study.…”

Section: Introductionmentioning

confidence: 99%

Surface Integrity and Structural Stability of Broached Inconel 718 at High Temperatures

Chen

Peng

Avdovic³

et al. 2016

Metall Mater Trans A

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The current study focused on the surface integrity issues associated with broaching of Inconel 718 and the structural stability of the broached specimen at high temperatures, mainly involving the microstructural changes and residual stress relaxation. The broaching operation was performed using similar cutting conditions as that used in turbo machinery industries for machining fir-tree root fixings on turbine disks. Thermal exposure was conducted at 723 K, 823 K and 923 K (450 ˚C, 550 ˚C and 650 ˚C) for 30, 300 and 3000 hours, respectively. Surface cavities and debris dragging, sub-surface cracks, high intensity of plastic deformation, as well as the generation of tensile residual stresses were identified to be the main issues in surface integrity for the broached Inconel 718. When a subsequent heating was applied, surface recrystallization and α-Cr precipitation occurred beneath the broached surface depending on the applied temperature and exposure time. The plastic deformation induced by the broaching is responsible for these microstructural changes. The surface tension was completely relaxed in a short time at the temperature where surface recrystallization occurred. The tensile layer on the sub-surface, however, exhibited a much higher resistance to the stress relief annealing. Oxidation is inevitable at high temperatures. The study found that the surface recrystallization could promote the local Cr diffusion on the broached surface.

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“…After in-depth research and rapid development, broaching equipment has been improved from conventional hydraulic internal broaching to CNC high-speed side broaching, 14,19 as shown in Figure 4. The broaching speed can reach 25-30 m/min, 20 which further improves the efficiency of broaching and the stability of processing quality.…”

Section: Broachingmentioning

confidence: 99%

A brief review on the status of machining technology of fir-tree slots on aero-engine turbine disk

Wenshuo

et al. 2022

Advances in Mechanical Engineering

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The machining precision and its consistency of turbine disk fir-tree slots have a direct influence on the performance of aero-engine rotor components. However, the structural dimensions of fir-tree slot are small, and the cutting performance of materials is extremely poor, which lead to great difficulty in machining and very few available machining methods. With the application of new materials in the aero-engines, the machining precision and quality requirements of fir-tree slots are further improved. Therefore, many research achievements on the high-efficiency, high-quality and low-cost machining technology of turbine disk fir-tree slots have been obtained. By summarizing and classifying the machining methods of aero-engine turbine disk fir-tree slots, a brief review on the characteristics of different methods are presented in detail, which provide a reference for selecting the appropriate machining method of turbine disk fir-tree slots in the field of aviation manufacturing. Meanwhile, combined with the research and application status of machining technology of turbine disk fir-tree slots, it is presented that multi-process compound machining is an effective method to realize high-efficiency, high-quality and low-cost precision machining of turbine disk fir-tree slots, such as wire electro discharge machining (wire-EDM) and profiled grinding, wire electrochemical machining (wire-ECM) and profiled grinding, wire-EDM and broaching, milling and broaching.

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Broaching of Inconel 718 with cemented carbide

Cited by 33 publications

References 5 publications

High performance cutting of advanced aerospace alloys and composite materials

High performance cutting of advanced aerospace alloys and composite materials

Surface Integrity and Structural Stability of Broached Inconel 718 at High Temperatures

A brief review on the status of machining technology of fir-tree slots on aero-engine turbine disk

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