DETERMINATION OF THE DEPTH OF HARDENED LAYER AFTER CENTRIFUGAL ROLLING OF LOW-RIGID SHAFTS
https://doi.org/10.26896/1028-6861-2018-84-9-64-71
Abstract
The issues regarding improving the quality of low-rigid shafts are considered through studying the stressed state of their surface layer. The depth of hardening, value and distribution of the residual stresses in the surface layer have a direct impact on the geometrical stability of low-rigid shafts. The main goal of hardening consists in providing the uniformity of the stressed state in the bulk. A novel design of a centrifugal roller is proposed to ensure effective hardening of low-rigid shafts. A notion of a mutual impact zone is introduced. Theoretical dependences providing determination of the optimal depth of the hardened layer of low-rigid shafts are presented. The experimental results regarding determination of the hardening depth as a function of the rotational frequency of a centrifugal roller are presented. The experimental data show that the quality of treating low-rigid shafts with a centrifugal roller depends on the characteristics and thickness of the mutual impact zone, which is determined by the average grain size of the microstructure. The developed design of a centrifugal roller provides an unchanged value of the working force, stability of deformation and stresses along the workpiece length. The optimal depth of hardening of the surface layer of low-rigid shafts attained upon finishing-hardening by surface plastic deformation (SPD), which is proved both theoretically and experimentally, should not exceed the size of the mutual impact zone.
About the Authors
S. A. Zaides
Irkutsk National Research Technical University
Russian Federation
Russian Federation
Semen A. Zaides.
Irkutsk.
A. V. Gorbunov
Irkutsk National Research Technical University
Russian Federation
Russian Federation
Andrew V. Gorbunov.
Irkutsk.
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Review
For citations:
Zaides S.A., Gorbunov A.V. DETERMINATION OF THE DEPTH OF HARDENED LAYER AFTER CENTRIFUGAL ROLLING OF LOW-RIGID SHAFTS. Industrial laboratory. Diagnostics of materials. 2018;84(9):64-71. (In Russ.) https://doi.org/10.26896/1028-6861-2018-84-9-64-71
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