Mathematical Method for Optimising the Transport and Logistics Industry

Gaidar, S. M.; Karelina, M. Yu.; Akulov, A. A.; Ershov, V. S.; Taldykin, D. S.

doi:10.1109/ieeeconf53456.2022.9744403

Cited by 11 publications

(1 citation statement)

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“…Ultrasonic exposure leads to a significant increase in the density of dislocations in the near-surface layers of the treated metals. If in non-deformed metals the average dislocation density is 106...108 cm -2 , after ultrasonic treatment the dislocation density increases to 3×1011 cm -2 that significantly increases the microhardness of the hardened layer [7][8].…”

Section: Research Results and Discussionmentioning

confidence: 99%

Effective combined surface hardening processes of structural steels using ultrasound

Chudina,

Simonov,

Simonova

et al. 2023

E3S Web Conf.

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The effectiveness of hardening of the surface layer of machine parts is evaluated by the operational properties of the surface layer and depends on many conditions that characterize the specific features of the technological process in which this method of hardening is carried out. The surface plastic deformation of structural steels with the use of ultrasound is studied. Four variants of hardening are considered: ultrasonic treatment with continuous supply of ultrasonic energy, pulse ultrasonic treatment, combination of ultrasonic treatment with subsequent pulse treatment, ultrasonic treatment after hardening with induction heating. It is shown that ultrasonic treatment increases microhardness of surface layer of structural steels by 1.5 times, HF hardening by more than 2 times, HF hardening + UZO combination by 3 times and HF hardening + IUZO combination by 3.2 times. Ultrasonic treatment increases compression stresses occurring in steel surface hardened by HFI hardening. The compressive stresses increase especially strongly after pulse ultrasonic treatment with five passes and reach the value of 1200 Pa.

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Section: Research Results and Discussionmentioning

confidence: 99%