Influence of tool characteristics on white layer produced by cutting hardened steel and prediction of white layer thickness

Li, Li; Lai, Debin; Ji, Quanxin; Huang, Jing; Lin, Yongchuan; Pan, Mingzhang; Wei, Jueyu; He, Shengjian

doi:10.1007/s00170-021-06599-1

Cited by 6 publications

(3 citation statements)

References 41 publications

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“…According to the previous result, the machining-affected layer is composed of a white layer, a dark layer, and a plastic deformation layer from the surface to the bulk. According to the previous research, the white layer formed due to grain nanocrystallization induced by phase transition [38][39][40][41][42][43]. The white layer can not only be formed under high temperature and high strain conditions, but also under low temperature and low strain conditions, as described in Figure 18(a).…”

Section: Formation Mechanisms Of Machining Metamorphic Layermentioning

confidence: 75%

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Surface Integrity of Inconel 738LC Parts Manufactured by Selective Laser Melting Followed by High-speed Milling

Ren

Guo

Zhang

2023

Chin. J. Mech. Eng.

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This study is concerned with the surface integrity of Inconel 738LC parts manufactured by selective laser melting (SLM) followed by high-speed milling (HSM). In the investigation process of surface integrity, the study employs ultra-depth three-dimensional microscopy, laser scanning confocal microscopy, scanning electron microscopy, electron backscatter diffractometry, and energy dispersive spectroscopy to characterize the evolution of material microstructure, work hardening, residual stress coupling, and anisotropic effect of the building direction on surface integrity of the samples. The results show that SLM/HSM hybrid manufacturing can be an effective method to obtain better surface quality with a thinner machining metamorphic layer. High-speed machining is adopted to reduce cutting force and suppress machining heat, which is an effective way to produce better surface mechanical properties during the SLM/HSM hybrid manufacturing process. In general, high-speed milling of the SLM-built Inconel 738LC samples offers better surface integrity, compared to simplex additive manufacturing or casting.

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Section: Formation Mechanisms Of Machining Metamorphic Layermentioning

confidence: 75%

“…Figure18 Formation conditions of white layer: a temperature and strain; b temperature and strain rate; c temperature, strain and strain rate[38][39][40][41][42][43] …”

mentioning

confidence: 99%

Surface Integrity of Inconel 738LC Parts Manufactured by Selective Laser Melting Followed by High-speed Milling

Ren

Guo

Zhang

2023

Chin. J. Mech. Eng.

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show abstract

“…However, workpiece is subjected to extremely high temperature and severe plastic deformation as the result of high hardness, which inevitably leads to the dramatic changes in the machined surface. Scholars has observed that white layer is formed on the machined surface during hard-cutting process [1] and differ from the bulk material in microstructure [2], surface quality [3] and mechanical property [4].…”

Section: Introductionmentioning

confidence: 99%

Modeling of Critical Cutting Speed of White Layer Formation in Hard-Cutting Process

Zhang

Duan

2021

Preprint

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White layer exists on the machined surface of the hard-cutting and affects the surface quality and mechanical properties of a workpiece. Accurate predicting the critical cutting speed of white layer formation is of great significance for controlling the surface quality and selecting appropriate cutting parameters. In this work, an austenite transformation driving force calculation model of the white layer formation was established based on phase transformation thermodynamics theory, in which the influence of cutting temperature, stress and strain on the austenite transformation driving force in the hard-cutting process was taken into account. Second, a finite element (FE) model of the hard-cutting process was built by using hardened AISI52100 steel as cutting material. Then, a prediction model of critical cutting speed of the white layer formation was developed in combination with the austenite transformation driving force model and the hard-cutting FE model. Finally, the critical cutting speeds of the white layer formation at different chip thicknesses, tool rake angles and different levels of flank wear were simulated by using the critical cutting speed prediction model.

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Modeling of critical cutting speed of white layer formation in the hard-cutting process

Zhang

Duan

2021

Int J Adv Manuf Technol

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Influence of tool characteristics on white layer produced by cutting hardened steel and prediction of white layer thickness

Cited by 6 publications

References 41 publications

Surface Integrity of Inconel 738LC Parts Manufactured by Selective Laser Melting Followed by High-speed Milling

Surface Integrity of Inconel 738LC Parts Manufactured by Selective Laser Melting Followed by High-speed Milling

Modeling of Critical Cutting Speed of White Layer Formation in Hard-Cutting Process

Modeling of critical cutting speed of white layer formation in the hard-cutting process

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