Deep Contact Strength of Surface Hardened Gears
| Autor: | Oxana Ananova, Besarion Meskhi, Nikolay Onishkov, Lubov Kotelnitskaya, Alexey Beskopylny |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
lcsh:TN1-997
Materials science strength criteria Alloy hardened layer 02 engineering and technology Plasticity engineering.material 01 natural sciences gears deep contact strength 0103 physical sciences General Materials Science Limit state design Bearing capacity Composite material plasticity parameter lcsh:Mining engineering. Metallurgy 010302 applied physics Metals and Alloys 021001 nanoscience & nanotechnology Durability hardness Core (optical fiber) chemical-thermal treatment Hardened steel fracture Fracture (geology) engineering durability 0210 nano-technology |
| Zdroj: | Metals, Vol 10, Iss 600, p 600 (2020) Metals Volume 10 Issue 5 |
| ISSN: | 2075-4701 |
| Popis: | This article is devoted to the analysis methods for assessing the load capacity of gears hardened by surface chemical-thermal treatment (CTT), which are characterized by structural and chemical heterogeneity. The leading type of failure is determined by several factors, the main of which are the surface and deep layer properties of the material, which fundamentally differ in the energy and structural state. Intercrystalline fracture mechanisms predominate in the surface layers and transcrystalline in the core. For these cases, the classical failure criteria of Mohr, Tresca, and Mises lead to significant errors. Therefore, the bearing capacity of the layer component is investigated by the generalized criterion of the limit state of the Pisarenko-Lebedev structurally inhomogeneous material, considering changes in its plastic properties due to surface hardening. The reliability of predicting the level of bearing capacity of surface hardened steel parts, such as gears, was significantly improved. The influence of the plasticity parameter on the level of bearing capacity for various types of CTT is estimated. Calculations using the presented model show that for alloy steels with a Ni content up to 1%, the safety coefficient can be limited to 1.2, which will increase the bearing capacity by 25&ndash 27%. |
| Databáze: | OpenAIRE |
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